{"title":"Taper Pipe Plug Gages","description":"\u003cp\u003eA taper pipe plug gage inspects an \u003cstrong\u003einternal\u003c\/strong\u003e tapered pipe thread — the threaded hole a fitting screws into. Because a taper thread seals by wedging rather than by bottoming out, it cannot be accepted on diameter alone: the gage establishes where the thread stands relative to the gaging notch or step, and that standoff is the measurement. WESTport manufactures taper pipe plug gages for NPT, NPTF and ANPT thread forms, precision ground and hand lapped, and certifies every one in our own climate-controlled, ISO\/IEC 17025 accredited laboratory with NIST-traceable documentation.\u003c\/p\u003e\n\n\u003ch2\u003eThe WESTport taper pipe plug gage line\u003c\/h2\u003e\n\u003cp\u003eEach gage below is a single product covering the full size range and every step type in that form. Select size and step type on the product page.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNPT Taper Pipe Plug Gage.\u003c\/strong\u003e L1 plug gages for general-purpose American National Standard Taper Pipe internal threads, checking functional size and hand-tight engagement across the standard pipe sizes from 1\/16-27 upward.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNPTF Taper Pipe Plug Gage.\u003c\/strong\u003e The full dryseal family in one product — L1 for hand-tight engagement, L3 for wrench engagement and taper, and the 6-step for crest and root truncation. NPTF threads seal without compound, so the truncation check is not optional.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eANPT Thread Plug Gage.\u003c\/strong\u003e Aeronautical National Form Taper Pipe gages manufactured to \u003cstrong\u003eSAE AS71051\u003c\/strong\u003e, in L-1, L-3 and 6-step, for pipe threads in aerospace fluid and pneumatic systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat taper pipe gages inspect\u003c\/h2\u003e\n\u003cul class=\"gg-tags\"\u003e\n  \u003cli\u003eHand-tight engagement (L1)\u003c\/li\u003e\n  \u003cli\u003eWrench engagement (L3 \/ L2)\u003c\/li\u003e\n  \u003cli\u003eThread taper\u003c\/li\u003e\n  \u003cli\u003eCrest truncation (6-step)\u003c\/li\u003e\n  \u003cli\u003eRoot truncation\u003c\/li\u003e\n  \u003cli\u003eFunctional size\u003c\/li\u003e\n  \u003cli\u003eNPT \/ NPTF \/ ANPT forms\u003c\/li\u003e\n  \u003cli\u003eDryseal sealing threads\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhich gage checks what\u003c\/h2\u003e\n\u003cp\u003eA taper pipe thread is not accepted on a single check. Each gage in the family answers a different question, which is why they are ordered together.\u003c\/p\u003e\n\u003cdiv class=\"gg-scroll\"\u003e\n  \u003ctable\u003e\n    \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eGage\u003c\/th\u003e\n\u003cth\u003eWhat it checks\u003c\/th\u003e\n\u003cth\u003eWhy it matters\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003cth\u003eL1\u003c\/th\u003e\n\u003ctd\u003eFunctional size — hand-tight engagement\u003c\/td\u003e\n\u003ctd\u003eConfirms the thread will start and seat to the correct standoff\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003cth\u003eL3 (plug) \/ L2 (ring)\u003c\/th\u003e\n\u003ctd\u003eWrench engagement and taper\u003c\/td\u003e\n\u003ctd\u003eConfirms enough usable thread remains past hand-tight to torque the joint\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003cth\u003e6-step\u003c\/th\u003e\n\u003ctd\u003eCrest and root truncation — the thread profile itself\u003c\/td\u003e\n\u003ctd\u003eRequired on NPTF dryseal threads, where crest-to-root contact makes the seal\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eNPT, NPTF and ANPT\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eNPT\u003c\/strong\u003e is the general-purpose American taper pipe thread; it seals on the flanks and normally needs a sealant. \u003cstrong\u003eNPTF\u003c\/strong\u003e is the dryseal form — the crests and roots interfere on assembly to seal without compound, which is why NPTF work requires the 6-step truncation check that NPT does not. \u003cstrong\u003eANPT\u003c\/strong\u003e is the aeronautical form manufactured to \u003cstrong\u003eSAE AS71051\u003c\/strong\u003e, dimensionally NPT but held to tighter limits and inspection requirements for aerospace fluid systems.\u003c\/p\u003e\n\n\u003ch2\u003eWhat comes with every gage\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCertificate of Accuracy, NIST traceable.\u003c\/strong\u003e Certified in our own climate-controlled, ISO\/IEC 17025 accredited laboratory.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLong form certification available.\u003c\/strong\u003e Full dimensional data where your quality system requires it.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIn-house calibration and recertification.\u003c\/strong\u003e Send gages back to us for periodic recert rather than replacing them.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMade in the USA.\u003c\/strong\u003e Precision ground and hand lapped for accuracy, finish and wear life.\u003c\/li\u003e\n\u003c\/ul\u003e\n","products":[{"product_id":"anpt-thread-plug-gage","title":"ANPT Thread Plug Gage","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eWESTport provides a complete range of Aeronautical National Form Taper Pipe Thread Gages per SAE AS71051. ANPT thread gages are intended for use on pipe, plugs, fittings, and similar devices in aeronautical components and equipment requiring a sealed thread joint and where straight threads and gaskets or O‐rings are inadequate.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cspan\u003eOther standards referenced are MIL‐G‐10944 ‐ Gages, Dimensional Control and AND10052 ‐ Bosses ‐ Standard Dimensions for External Pipe Thread. Inspection gages shall not be used when worn beyond the basic dimensions by more than a ½ turn or pitch. In the case of internal threads, proper allowance shall be made for any variation from basic when using a gage L1 and L3.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cspan\u003eThese gages may be used, having three gaging notches, basic, maximum, and minimum, representing the tolerance of plus or minus one turn, the maximum notch being one turn below basic and all three notches equally spaced around the gage diameter. If requirements exists for external or internal threads to be chamfered or countersunk in excess of the dimensions in table 1 of the standard, then the thread size should be determined by using as the reference point, the end of the chamfer or bottom of the countersink (first thread scratch) instead of from the end of the pipe or fitting.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cspan\u003eWESTport Gage Corporation provides a Certificate of Accuracy, traceable to NIST (National Institute of Standards and Technology), free of charge with every gage.\u003c\/span\u003e\u003c\/p\u003e","brand":"WESTport","offers":[{"title":"ANPT L-1 \/ 1\/16-27","offer_id":43658020421668,"sku":"ANPT1P-01","price":215.67,"currency_code":"USD","in_stock":true},{"title":"ANPT L-1 \/ 1\/8-27","offer_id":43658020519972,"sku":"ANPT1P-02","price":215.67,"currency_code":"USD","in_stock":true},{"title":"ANPT L-1 \/ 1\/4-18","offer_id":43658020618276,"sku":"ANPT1P-03","price":215.67,"currency_code":"USD","in_stock":true},{"title":"ANPT L-1 \/ 3\/8-18","offer_id":43658020716580,"sku":"ANPT1P-04","price":201.11,"currency_code":"USD","in_stock":true},{"title":"ANPT L-1 \/ 1\/2-14","offer_id":43658020814884,"sku":"ANPT1P-05","price":183.82,"currency_code":"USD","in_stock":true},{"title":"ANPT L-1 \/ 3\/4-14","offer_id":43658020913188,"sku":"ANPT1P-06","price":196.56,"currency_code":"USD","in_stock":true},{"title":"ANPT L-1 \/ 1-11 1\/2","offer_id":43658021011492,"sku":"ANPT1P-07","price":222.95,"currency_code":"USD","in_stock":true},{"title":"ANPT L-1 \/ 1 1\/4-11 1\/2","offer_id":43658021109796,"sku":"ANPT1P-08","price":232.05,"currency_code":"USD","in_stock":true},{"title":"ANPT L-1 \/ 1 1\/2-11 1\/2","offer_id":43658021208100,"sku":"ANPT1P-09","price":260.26,"currency_code":"USD","in_stock":true},{"title":"ANPT L-1 \/ 2-11 1\/2","offer_id":43658021306404,"sku":"ANPT1P-10","price":317.13,"currency_code":"USD","in_stock":true},{"title":"ANPT L-1 \/ 2 1\/2-8","offer_id":43658021404708,"sku":"ANPT1P-11","price":509.2,"currency_code":"USD","in_stock":true},{"title":"ANPT L-1 \/ 3-8","offer_id":43658021503012,"sku":"ANPT1P-12","price":575.7,"currency_code":"USD","in_stock":true},{"title":"ANPT L-3 \/ 1\/16-27","offer_id":43658020454436,"sku":"ANPT3P-01","price":262.99,"currency_code":"USD","in_stock":true},{"title":"ANPT L-3 \/ 1\/8-27","offer_id":43658020552740,"sku":"ANPT3P-02","price":201.11,"currency_code":"USD","in_stock":true},{"title":"ANPT L-3 \/ 1\/4-18","offer_id":43658020651044,"sku":"ANPT3P-03","price":201.11,"currency_code":"USD","in_stock":true},{"title":"ANPT L-3 \/ 3\/8-18","offer_id":43658020749348,"sku":"ANPT3P-04","price":201.11,"currency_code":"USD","in_stock":true},{"title":"ANPT L-3 \/ 1\/2-14","offer_id":43658020847652,"sku":"ANPT3P-05","price":215.67,"currency_code":"USD","in_stock":true},{"title":"ANPT L-3 \/ 3\/4-14","offer_id":43658020945956,"sku":"ANPT3P-06","price":215.67,"currency_code":"USD","in_stock":true},{"title":"ANPT L-3 \/ 1-11 1\/2","offer_id":43658021044260,"sku":"ANPT3P-07","price":262.99,"currency_code":"USD","in_stock":true},{"title":"ANPT L-3 \/ 1 1\/4-11 1\/2","offer_id":43658021142564,"sku":"ANPT3P-08","price":262.99,"currency_code":"USD","in_stock":true},{"title":"ANPT L-3 \/ 1 1\/2-11 1\/2","offer_id":43658021240868,"sku":"ANPT3P-09","price":262.99,"currency_code":"USD","in_stock":true},{"title":"ANPT L-3 \/ 2-11 1\/2","offer_id":43658021339172,"sku":"ANPT3P-10","price":317.13,"currency_code":"USD","in_stock":true},{"title":"ANPT L-3 \/ 2 1\/2-8","offer_id":43658021437476,"sku":"ANPT3P-11","price":509.2,"currency_code":"USD","in_stock":true},{"title":"ANPT L-3 \/ 3-8","offer_id":43658021535780,"sku":"ANPT3P-12","price":575.7,"currency_code":"USD","in_stock":true},{"title":"ANPT 6-Step \/ 1\/16-27","offer_id":43658020388900,"sku":"ANPT6P-01","price":265.72,"currency_code":"USD","in_stock":true},{"title":"ANPT 6-Step \/ 1\/8-27","offer_id":43658020487204,"sku":"ANPT6P-02","price":265.72,"currency_code":"USD","in_stock":true},{"title":"ANPT 6-Step \/ 1\/4-18","offer_id":43658020585508,"sku":"ANPT6P-03","price":265.72,"currency_code":"USD","in_stock":true},{"title":"ANPT 6-Step \/ 3\/8-18","offer_id":43658020683812,"sku":"ANPT6P-04","price":265.72,"currency_code":"USD","in_stock":true},{"title":"ANPT 6-Step \/ 1\/2-14","offer_id":43658020782116,"sku":"ANPT6P-05","price":265.72,"currency_code":"USD","in_stock":true},{"title":"ANPT 6-Step \/ 3\/4-14","offer_id":43658020880420,"sku":"ANPT6P-06","price":279.37,"currency_code":"USD","in_stock":true},{"title":"ANPT 6-Step \/ 1-11 1\/2","offer_id":43658020978724,"sku":"ANPT6P-07","price":305.76,"currency_code":"USD","in_stock":true},{"title":"ANPT 6-Step \/ 1 1\/4-11 1\/2","offer_id":43658021077028,"sku":"ANPT6P-08","price":322.14,"currency_code":"USD","in_stock":true},{"title":"ANPT 6-Step \/ 1 1\/2-11 1\/2","offer_id":43658021175332,"sku":"ANPT6P-09","price":350.35,"currency_code":"USD","in_stock":true},{"title":"ANPT 6-Step \/ 2-11 1\/2","offer_id":43658021273636,"sku":"ANPT6P-10","price":498.48,"currency_code":"USD","in_stock":true},{"title":"ANPT 6-Step \/ 2 1\/2-8","offer_id":43658021371940,"sku":"ANPT6P-11","price":783.75,"currency_code":"USD","in_stock":true},{"title":"ANPT 6-Step \/ 3-8","offer_id":43658021470244,"sku":"ANPT6P-12","price":849.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2546\/6268\/files\/ANPTTaperPipePlugGagesGroup2.png?v=1781885660"},{"product_id":"npt-taper-pipe-plug-gage","title":"NPT Taper Pipe Plug Gage","description":"\u003cdiv\u003e\n\u003cbr\u003e\n\u003ch2\u003e\u003ca href=\"http:\/\/www.westportcorp.com\/resources\/national-standard-taper-pipe-threads-size-npt-chart\/#thread-plug-gages\"\u003e National Standard Taperpipe Threads NPT Chart \u003c\/a\u003e\u003c\/h2\u003e\n\u003cbr\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\u003cdiv\u003eNPT L1 plug (American National Standard Taper Pipe) is used to check an internal threaded hole. The NPT L1 plug inspects the functional size or hand tight engagement of couplings or an internal thread. Parts being checked are generally acceptable when they come flush with the notch to plus (+) or minus (-) one turn. \u003cbr\u003e \u003cbr\u003e NPT L1 taper pipe ring gages are used to check external threaded parts. NPT L1 rings inspect the functional size or hand tight engagement of the pipe, nipple or male threads. When gaging NPT threaded parts, thread the marked side on first. Parts being checked are generally acceptable when they come flush to end of ring to plus (+) or minus (-) one turn. \u003cbr\u003e \u003cbr\u003e NPTF L1 plug is used to check an internal threaded hole. The NPTF L1 plug inspects the functional size or hand tight engagement of couplings or an internal thread. NPTF gages are used to inspect pipe threads that are used in Dryseal applications. NPTF gages are manufactured per ANSI\/ASME B1.20.5Screw the L1 plug into the fitting (hand tighten). This classifies the thread as to “Maximum”, “Basic”, or “Minimum”. NPTF (Dryseal) and ANPT (Aeronautical) thread tolerances are more closely controlled requiring an L3 gage as well as an L1. \u003cbr\u003e \u003cbr\u003e NPTF L3 plug is used to check an internal threaded hole. The NPTF L3 plug inspects the wrench engagement and taper of couplings or internal threads and is used in conjunction or relationship with the NPTF L1. NPTF gages are used to inspect pipe threads that are used in Dryseal applications Screw the L3 plug into the fitting (hand tighten). The gage must match the classification of the L1 plug within +\/- 1\/2 turns. NPTF (Dryseal) and ANPT (Aeronautical) thread tolerances are more closely controlled requiring an L3 gage as well as an L1.\u003cbr\u003e \u003cbr\u003e NPTF 6 step plug is used in tapered threaded holes. The NPTF 6 step plug inspects the crest truncation or profile of the internal threads and is used in conjunction with L1 plug. NPTF gages are used to inspect pipe threads that are used in Dryseal applications. Insert the 6-step (crest check) plug into the fitting. When the L1 plug is at the maximum notch, the 6-step gage must go between “MX” and “MXT” notch. When the L1 plug is at the Basic Notch, the 6-Step gage must go between “B” and “BT” notch. When the L1 plug is at minimum notch, the 6-Step gage must go between the “MN” and “MNT” notch. \u003cbr\u003e \u003cbr\u003e NPTF L1 ring gages are used to check external threaded parts. NPTF L1 ring gages inspect the functional size or hand tight engagement of the pipe, nipple or male threads. NPTF gages are used to inspect pipe threads that are used in Dryseal applications NPTF (Dryseal) and ANPT (Aeronautical) thread tolerances are more closely controlled requiring an L2 thick ring gage as well as the L1 ring. \u003cbr\u003e \u003cbr\u003e NPTF L2 ring inspects the wrench engagement threads of a coupling and taper of the external threads and to be used in conjunction or relationship with the NPTF L1. NPTF gages are used to inspect pipe threads that are used in Dryseal applications NPTF (Dryseal) and ANPT (Aeronautical) thread tolerances are more closely controlled requiring an L2 thick ring gage as well as the L1 ring. \u003cbr\u003e \u003cbr\u003e NPTF 6 step ring gages are used to check external threaded parts. NPTF 6 step ring gages check the crest truncation or profile of the external threads and are used in conjunction or relationship with the L1 ring. NPTF gages are used to inspect pipe threads that are used in Dryseal applications NPTF (Dryseal) and ANPT (Aeronautical) thread tolerances are more closely controlled requiring an L2 thick ring gage as well as the L1 ring. \u003cbr\u003e \u003cbr\u003e WESTport Gage offers a complete line of taper pipe gages including special and custom designs. NPT general purpose pipe thread plug and ring gages are manufactured per ANSI\/ASME B1.20.1. Threads are within the permissible limits of the tolerance when the gaging notch of the plug or gaging face of the ring is plus or minus one turn from being flush with the end of the thread. \u003cbr\u003e \u003cbr\u003e NPTF gages are used to inspect pipe threads that are used in dryseal applications. NPTF gages are manufactured per ANSI\/ASME B1.20.5. Standard practice for gaging NPTF threads calls for using 2 or 3 gages used in conjunction with each other. The standard calls out class 1 and class 2 NPTF threads. Class 1 signifies that specific inspection of root and crest truncation is not required, while class 2 signifies that such is required. Other taper pipe thread gages include PTF SAE Short and NGT sizes.\u003c\/div\u003e\n\u003c\/div\u003e","brand":"WESTport Corp.","offers":[{"title":"1\/16-27 \/ L1","offer_id":43883338694692,"sku":"NPTP-01","price":88.0,"currency_code":"USD","in_stock":true},{"title":"1\/8-27 \/ L1","offer_id":43883338727460,"sku":"NPTP-02","price":69.0,"currency_code":"USD","in_stock":true},{"title":"1\/4-18 \/ L1","offer_id":43883338629156,"sku":"NPTP-03","price":72.0,"currency_code":"USD","in_stock":true},{"title":"3\/8-18 \/ L1","offer_id":43883338661924,"sku":"NPTP-04","price":80.0,"currency_code":"USD","in_stock":true},{"title":"1\/2-14 \/ L1","offer_id":43883338563620,"sku":"NPTP-05","price":90.0,"currency_code":"USD","in_stock":true},{"title":"3\/4-14 \/ L1","offer_id":43883338596388,"sku":"NPTP-06","price":104.0,"currency_code":"USD","in_stock":true},{"title":"1-11 1\/2 \/ L1","offer_id":43883338367012,"sku":"NPTP-07","price":114.0,"currency_code":"USD","in_stock":true},{"title":"1 1\/4-11 1\/2 \/ L1","offer_id":43883338399780,"sku":"NPTP-08","price":128.0,"currency_code":"USD","in_stock":true},{"title":"1 1\/2-11 1\/2 \/ L1","offer_id":43883338465316,"sku":"NPTP-09","price":144.0,"currency_code":"USD","in_stock":true},{"title":"2-11 1\/2 \/ L1","offer_id":43883338498084,"sku":"NPTP-10","price":177.0,"currency_code":"USD","in_stock":true},{"title":"2 1\/2-8 \/ L1","offer_id":43883338235940,"sku":"NPTP-11","price":212.0,"currency_code":"USD","in_stock":true},{"title":"3-8 \/ L1","offer_id":43883338268708,"sku":"NPTP-12","price":246.0,"currency_code":"USD","in_stock":true},{"title":"3 1\/2-8 \/ L1","offer_id":43883338301476,"sku":"NPTP-13","price":369.0,"currency_code":"USD","in_stock":true},{"title":"4-8 \/ L1","offer_id":43883338334244,"sku":"NPTP-14","price":410.0,"currency_code":"USD","in_stock":true},{"title":"5-8 \/ L1","offer_id":43883338432548,"sku":"NPTP-15","price":573.0,"currency_code":"USD","in_stock":true},{"title":"6-8 \/ L1","offer_id":43883338530852,"sku":"NPTP-16","price":682.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2546\/6268\/files\/NPTTaperPipePlugGage.png?v=1781892868"},{"product_id":"nptf-taper-pipe-plug-gage","title":"NPTF Taper Pipe Plug Gage","description":"\u003cdiv\u003e\n\u003cbr\u003e\n\u003ch2\u003e\u003ca href=\"http:\/\/www.westportcorp.com\/resources\/national-standard-taper-pipe-threads-size-npt-chart\/#thread-plug-gages\"\u003e National Standard Taperpipe Threads NPT Chart \u003c\/a\u003e\u003c\/h2\u003e\n\u003cbr\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\u003cdiv\u003eNPT L1 plug (American National Standard Taper Pipe) is used to check an internal threaded hole. The NPT L1 plug inspects the functional size or hand tight engagement of couplings or an internal thread. Parts being checked are generally acceptable when they come flush with the notch to plus (+) or minus (-) one turn. \u003cbr\u003e \u003cbr\u003e NPT L1 taper pipe ring gages are used to check external threaded parts. NPT L1 rings inspect the functional size or hand tight engagement of the pipe, nipple or male threads. When gaging NPT threaded parts, thread the marked side on first. Parts being checked are generally acceptable when they come flush to end of ring to plus (+) or minus (-) one turn. \u003cbr\u003e \u003cbr\u003e NPTF L1 plug is used to check an internal threaded hole. The NPTF L1 plug inspects the functional size or hand tight engagement of couplings or an internal thread. NPTF gages are used to inspect pipe threads that are used in Dryseal applications. NPTF gages are manufactured per ANSI\/ASME B1.20.5Screw the L1 plug into the fitting (hand tighten). This classifies the thread as to “Maximum”, “Basic”, or “Minimum”. NPTF (Dryseal) and ANPT (Aeronautical) thread tolerances are more closely controlled requiring an L3 gage as well as an L1. \u003cbr\u003e \u003cbr\u003e NPTF L3 plug is used to check an internal threaded hole. The NPTF L3 plug inspects the wrench engagement and taper of couplings or internal threads and is used in conjunction or relationship with the NPTF L1. NPTF gages are used to inspect pipe threads that are used in Dryseal applications Screw the L3 plug into the fitting (hand tighten). The gage must match the classification of the L1 plug within +\/- 1\/2 turns. NPTF (Dryseal) and ANPT (Aeronautical) thread tolerances are more closely controlled requiring an L3 gage as well as an L1.\u003cbr\u003e \u003cbr\u003e NPTF 6 step plug is used in tapered threaded holes. The NPTF 6 step plug inspects the crest truncation or profile of the internal threads and is used in conjunction with L1 plug. NPTF gages are used to inspect pipe threads that are used in Dryseal applications. Insert the 6-step (crest check) plug into the fitting. When the L1 plug is at the maximum notch, the 6-step gage must go between “MX” and “MXT” notch. When the L1 plug is at the Basic Notch, the 6-Step gage must go between “B” and “BT” notch. When the L1 plug is at minimum notch, the 6-Step gage must go between the “MN” and “MNT” notch. \u003cbr\u003e \u003cbr\u003e NPTF L1 ring gages are used to check external threaded parts. NPTF L1 ring gages inspect the functional size or hand tight engagement of the pipe, nipple or male threads. NPTF gages are used to inspect pipe threads that are used in Dryseal applications NPTF (Dryseal) and ANPT (Aeronautical) thread tolerances are more closely controlled requiring an L2 thick ring gage as well as the L1 ring. \u003cbr\u003e \u003cbr\u003e NPTF L2 ring inspects the wrench engagement threads of a coupling and taper of the external threads and to be used in conjunction or relationship with the NPTF L1. NPTF gages are used to inspect pipe threads that are used in Dryseal applications NPTF (Dryseal) and ANPT (Aeronautical) thread tolerances are more closely controlled requiring an L2 thick ring gage as well as the L1 ring. \u003cbr\u003e \u003cbr\u003e NPTF 6 step ring gages are used to check external threaded parts. NPTF 6 step ring gages check the crest truncation or profile of the external threads and are used in conjunction or relationship with the L1 ring. NPTF gages are used to inspect pipe threads that are used in Dryseal applications NPTF (Dryseal) and ANPT (Aeronautical) thread tolerances are more closely controlled requiring an L2 thick ring gage as well as the L1 ring. \u003cbr\u003e \u003cbr\u003e WESTport Gage offers a complete line of taper pipe gages including special and custom designs. NPT general purpose pipe thread plug and ring gages are manufactured per ANSI\/ASME B1.20.1. Threads are within the permissible limits of the tolerance when the gaging notch of the plug or gaging face of the ring is plus or minus one turn from being flush with the end of the thread. \u003cbr\u003e \u003cbr\u003e NPTF gages are used to inspect pipe threads that are used in dryseal applications. NPTF gages are manufactured per ANSI\/ASME B1.20.5. Standard practice for gaging NPTF threads calls for using 2 or 3 gages used in conjunction with each other. The standard calls out class 1 and class 2 NPTF threads. Class 1 signifies that specific inspection of root and crest truncation is not required, while class 2 signifies that such is required. 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