{"title":"Gage Block Sets","description":"\u003cp\u003eWESTport offers precision gage block sets for dimensional inspection, instrument setting, calibration and measurement verification from leading metrology manufacturers including Fowler, Mitutoyo, Starrett-Webber and INSIZE. Gage blocks are the reference standards other precision instruments are set and verified against, which makes their accuracy grade and calibration status central to any documented inspection process.\u003c\/p\u003e\n\u003cp\u003eChoose from economical workshop-grade sets through AS-2, AS-1 and Grade 0 precision systems for quality-control departments, machine shops, manufacturing facilities and calibration laboratories. Available configurations include 35-piece, 36-piece and comprehensive 81-piece sets in multiple accuracy grades.\u003c\/p\u003e\n\u003ch2\u003eWhy Buy Gage Blocks from WESTport?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eFowler, Mitutoyo, Starrett-Webber and INSIZE models\u003c\/li\u003e\n\u003cli\u003eAccuracy grades from Economy and Grade B through AS-2, AS-1 and Grade 0\u003c\/li\u003e\n\u003cli\u003e35-piece, 36-piece and 81-piece configurations\u003c\/li\u003e\n\u003cli\u003eWorkshop through calibration-grade systems\u003c\/li\u003e\n\u003cli\u003eHardened, stress-relieved and precision-lapped steel construction\u003c\/li\u003e\n\u003cli\u003eCertificates traceable to NIST\u003c\/li\u003e\n\u003cli\u003eISO\/IEC 17025 accredited calibration services available\u003c\/li\u003e\n\u003cli\u003eTechnical product assistance from our metrology team\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eContact WESTport for pricing and current availability.\u003c\/p\u003e","products":[{"product_id":"fowler-81-piece-rectangular-steel-gage-block-set","title":"Fowler 81-Piece Rectangular Steel Gage Block Set","description":"\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e81-piece professional set\u003c\/li\u003e\n\u003cli\u003eThree accuracy grades: Economy, AS-1 and Grade 0\u003c\/li\u003e\n\u003cli\u003eExtensive 0.050\"–4.000\" size coverage\u003c\/li\u003e\n\u003cli\u003eHardened high-carbon \/ chrome steel\u003c\/li\u003e\n\u003cli\u003eApproximately 65 HRC hardness\u003c\/li\u003e\n\u003cli\u003eStress relieved for dimensional stability\u003c\/li\u003e\n\u003cli\u003ePrecision lapped measuring surfaces\u003c\/li\u003e\n\u003cli\u003eMirror-polished finish\u003c\/li\u003e\n\u003cli\u003eIndividually serialized blocks on AS-1 and Grade 0\u003c\/li\u003e\n\u003cli\u003eCertificate of Inspection traceable to NIST\u003c\/li\u003e\n\u003cli\u003eFitted protective case\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eThe Fowler 81-piece rectangular steel gage block set provides an extensive selection of standard inch sizes from 0.050\" through 4.000\", allowing users to build a wide variety of precision reference dimensions for checking measuring instruments, setting comparative gages and performing dimensional inspection.\u003c\/p\u003e\n\u003cp\u003eThe hardened high-carbon\/chrome steel blocks are stress relieved, precision lapped and mirror polished, and every set includes a fitted protective case and a Certificate of Inspection traceable to NIST.\u003c\/p\u003e\n\u003ch2\u003eChoosing a Grade\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eEconomy \/ Workshop\u003c\/strong\u003e is the value-oriented choice for machine shops and production floors that need a comprehensive inch set without laboratory-grade accuracy, at ±0.000050\".\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAS-1\u003c\/strong\u003e steps up to inspection-grade accuracy with individually serialized blocks and a fitted wooden case, for professional dimensional inspection where traceability per block matters.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGrade 0\u003c\/strong\u003e is the tightest of the three, individually inspected for size, parallelism and flatness, for precision inspection, quality-control and calibration applications.\u003c\/p\u003e\n\u003cp\u003eAll three are the same 81-piece configuration covering the same size range — the choice is purely how tight an accuracy grade the work requires.\u003c\/p\u003e\n\u003ch2\u003eCalibration and Traceability\u003c\/h2\u003e\n\u003cp\u003eGage blocks are the reference standards other instruments are set against, so their own calibration status governs the credibility of everything measured with them. WESTport provides ISO\/IEC 17025 accredited calibration to keep a set documented and controlled over its working life.\u003c\/p\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cp\u003eInstrument setting and verification, comparative gage setting, dimensional inspection and layout in machine shops, manufacturing quality departments and calibration laboratories.\u003c\/p\u003e","brand":"WESTport Corp.","offers":[{"title":"Economy","offer_id":51277128302628,"sku":"53-672-081","price":0.01,"currency_code":"USD","in_stock":true},{"title":"AS-1","offer_id":51277128335396,"sku":"53-670-081","price":0.01,"currency_code":"USD","in_stock":true},{"title":"Grade 0","offer_id":51277128368164,"sku":"53-670-080-0","price":0.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2546\/6268\/files\/FOWLER_81-PIECE_ECONOMY_RECTANGULAR_STEEL_GAGE_BLOCK_SET_Part_Number_53-672-081.png?v=1786998980"},{"product_id":"insize-steel-gage-block-set","title":"INSIZE Steel Gage Block Set","description":"\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eThree configurations: 36-piece Grade 0, 81-piece AS-1, 81-piece Grade 0\u003c\/li\u003e\n\u003cli\u003eRectangular steel construction\u003c\/li\u003e\n\u003cli\u003eBroad 0.050\"–4.000\" capability on the 81-piece sets\u003c\/li\u003e\n\u003cli\u003eShort-form certificate included\u003c\/li\u003e\n\u003cli\u003eTraceable to NIST\u003c\/li\u003e\n\u003cli\u003eMeets or exceeds applicable ASME B89.1.9 requirements\u003c\/li\u003e\n\u003cli\u003eExcellent price-to-performance ratio\u003c\/li\u003e\n\u003cli\u003eStrong alternative to higher-priced premium brands\u003c\/li\u003e\n\u003cli\u003eProtective fitted storage case\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eINSIZE rectangular steel gage block sets give WESTport customers professional accuracy grades at a significantly lower investment than many premium-brand equivalents, with a short-form certificate traceable to NIST.\u003c\/p\u003e\n\u003ch2\u003eChoosing a Configuration\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003e36-piece Grade 0\u003c\/strong\u003e set is the compact professional choice — designed for inspection departments, machine shops and calibration work that needs precision reference standards but not the extensive size selection of an 81-piece system. It is easier to manage and faster to work from when the frequently used dimensions are what matter.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003e81-piece\u003c\/strong\u003e sets provide a very large number of buildable reference dimensions from a single case, well suited to shops and metrology operations working across a wide variety of component sizes. Choose \u003cstrong\u003eAS-1\u003c\/strong\u003e for professional dimensional inspection, or \u003cstrong\u003eGrade 0\u003c\/strong\u003e for the tighter accuracy demanded by quality-control laboratories that regularly set or verify precision measuring instruments.\u003c\/p\u003e\n\u003ch2\u003eCalibration and Traceability\u003c\/h2\u003e\n\u003cp\u003eGage blocks are the reference standards other instruments are set against, so their own calibration status governs the credibility of everything measured with them. WESTport provides ISO\/IEC 17025 accredited calibration to keep a set documented and controlled over its working life.\u003c\/p\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cp\u003eDimensional inspection, measuring-instrument verification, comparative gage setting and calibration in machine shops, manufacturing quality departments and QC laboratories.\u003c\/p\u003e","brand":"WESTport Corp.","offers":[{"title":"36-Piece Grade 0","offer_id":51277166215204,"sku":"4102-36","price":0.01,"currency_code":"USD","in_stock":true},{"title":"81-Piece AS-1","offer_id":51277166247972,"sku":"4102-181","price":0.01,"currency_code":"USD","in_stock":true},{"title":"81-Piece Grade 0","offer_id":51277166280740,"sku":"4102-81","price":0.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2546\/6268\/files\/INSIZE_81-PIECE_AS-1_STEEL_GAGE_BLOCK_SET_Part_Number_4102-181.png?v=1786998988"},{"product_id":"mitutoyo-rectangular-steel-gage-block-set","title":"Mitutoyo Rectangular Steel Gage Block Set","description":"\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ePremium Mitutoyo construction\u003c\/li\u003e\n\u003cli\u003eFour configurations: 35-piece AS-2 and Grade 0, 81-piece AS-1 and Grade 0\u003c\/li\u003e\n\u003cli\u003eRepeated controlled heat treatment for dimensional stability\u003c\/li\u003e\n\u003cli\u003eAdvanced lapped measuring surfaces\u003c\/li\u003e\n\u003cli\u003eExcellent wringing characteristics\u003c\/li\u003e\n\u003cli\u003eClear laser-marked identification\u003c\/li\u003e\n\u003cli\u003eInspection Certificate included\u003c\/li\u003e\n\u003cli\u003eSolid wooden storage case\u003c\/li\u003e\n\u003cli\u003eSuits inspection through calibration-laboratory work\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eMitutoyo rectangular steel gage block sets are the premium steel choice in the WESTport assortment. Mitutoyo's controlled heat treatment is applied repeatedly to reduce dimensional change over time, while advanced lapping provides the flatness and surface finish required for precision wringing.\u003c\/p\u003e\n\u003ch2\u003eChoosing a Configuration\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003e35-piece\u003c\/strong\u003e sets contain a carefully selected group of commonly useful inch dimensions, for customers who want Mitutoyo precision and traceability without purchasing a full 81-piece set. They keep the set compact and easy to manage. \u003cstrong\u003eAS-2\u003c\/strong\u003e is the entry point; \u003cstrong\u003eGrade 0\u003c\/strong\u003e is the tighter choice for calibration laboratories and manufacturing quality operations.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003e81-piece\u003c\/strong\u003e sets provide broad dimensional flexibility, letting users create an extensive range of reference lengths for setting and checking precision measuring instruments, comparative gages and inspection equipment. \u003cstrong\u003eAS-1\u003c\/strong\u003e serves professional dimensional inspection; \u003cstrong\u003eGrade 0\u003c\/strong\u003e is the premium option for aerospace, medical, automotive, defense and calibration customers whose requirements extend beyond ordinary workshop-grade blocks.\u003c\/p\u003e\n\u003ch2\u003eCalibration and Traceability\u003c\/h2\u003e\n\u003cp\u003eGage blocks are the reference standards other instruments are set against, so their own calibration status governs the credibility of everything measured with them. WESTport provides ISO\/IEC 17025 accredited calibration to keep a set documented and controlled over its working life.\u003c\/p\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cp\u003ePrecision inspection departments, calibration laboratories and manufacturing quality operations — anywhere reference lengths must be built to a documented, traceable accuracy grade.\u003c\/p\u003e","brand":"WESTport Corp.","offers":[{"title":"35-Piece AS-2","offer_id":51277166313508,"sku":"516-916-26","price":0.01,"currency_code":"USD","in_stock":true},{"title":"35-Piece Grade 0","offer_id":51277166346276,"sku":"516-914-26","price":0.01,"currency_code":"USD","in_stock":true},{"title":"81-Piece AS-1","offer_id":51277166379044,"sku":"516-903-26","price":0.01,"currency_code":"USD","in_stock":true},{"title":"81-Piece Grade 0","offer_id":51277166411812,"sku":"516-902-26","price":0.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2546\/6268\/files\/MITUTOYO_81_PIECE_AS-1_RECTANGULAR_GAGE_BLOCK_SET_516-903-26.png?v=1786998996"},{"product_id":"starrett-webber-81-piece-rectangular-steel-gage-block-set","title":"Starrett-Webber 81-Piece Rectangular Steel Gage Block Set","description":"\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e81-piece English set\u003c\/li\u003e\n\u003cli\u003eTwo accuracy grades: B and AS-1\u003c\/li\u003e\n\u003cli\u003eRectangular steel construction\u003c\/li\u003e\n\u003cli\u003eEstablished Starrett-Webber dimensional standards\u003c\/li\u003e\n\u003cli\u003eBroad dimensional coverage\u003c\/li\u003e\n\u003cli\u003eSuitable for instrument setting and verification\u003c\/li\u003e\n\u003cli\u003eCertificate of calibration on AS-1\u003c\/li\u003e\n\u003cli\u003eRecognizable American precision-measurement brand\u003c\/li\u003e\n\u003cli\u003eProfessional protective storage\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eThe Starrett-Webber RS81 is an 81-piece English rectangular steel gage block system from one of the most established names in precision dimensional standards, and the natural choice for customers who specify Starrett-Webber.\u003c\/p\u003e\n\u003ch2\u003eChoosing a Grade\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eGrade B\u003c\/strong\u003e is the shop-floor reference set — broad dimensional capability combined with the Starrett-Webber name, sitting between economy workshop sets and considerably more expensive inspection-grade systems.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAS-1\u003c\/strong\u003e is the premium choice, combining the same extensive 81-piece English configuration with inspection-grade accuracy and a certificate of calibration. It is appropriate for customers running professional dimensional inspection, calibration and quality-control work rather than shop-floor setting.\u003c\/p\u003e\n\u003ch2\u003eCalibration and Traceability\u003c\/h2\u003e\n\u003cp\u003eGage blocks are the reference standards other instruments are set against, so their own calibration status governs the credibility of everything measured with them. WESTport provides ISO\/IEC 17025 accredited calibration to keep a set documented and controlled over its working life.\u003c\/p\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cp\u003eMachine shops and inspection departments needing broad dimensional capability, and sophisticated quality departments that specify Starrett-Webber dimensional standards.\u003c\/p\u003e","brand":"WESTport Corp.","offers":[{"title":"B","offer_id":51277128695844,"sku":"RS81.B","price":0.01,"currency_code":"USD","in_stock":true},{"title":"AS-1","offer_id":51277128728612,"sku":"RS81.A1","price":0.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2546\/6268\/files\/STARRETT-WEBBER_81-PIECE_B-GRADE_RECTANGULAR_STEEL_GAGE_BLOCK_SET_RS_81B.png?v=1786999002"}],"url":"https:\/\/westportcorp.com\/collections\/gage-block-sets.oembed","provider":"WESTport","version":"1.0","type":"link"}