WESTport straight-sided spline plug gages inspect internal straight-sided splines, where the tooth flanks run parallel rather than following an involute profile. The GO member verifies full-form fit; the NO GO member guards individual space width.

Standards & setup

Built to the straight-sided standard called out on your print, such as DIN 5482, or to your drawing. Straight-sided gages are not interchangeable with involute spline gages — confirm the tooth form on the drawing before ordering.

Certification & quality

• Designed, ground, and hand lapped in-house for accuracy and long service life
• Certificate of Accuracy, NIST-traceable — included with every gage
• Certified to ISO/IEC 17025; Long Form Certification available on a 5–7 business day turnaround

Request a quote, or inspect external straight-sided splines with the Straight-Sided Spline Ring Gage. For serrated forms see the Serration Spline Plug Gage.