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Progressive Cylindrical Trilock Plug Gages

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Progressive Cylindrical Trilock Plug Gages

  • Progressive trilock plug gages check the GO and NOGO inspection of a hole with one insertion of the gage
  • Single end gage having GO and NO GO members stepped on a single gage
  • Parts can be inspected quickly with a progressive plug gage
  • Available in Class XX, X, Y and Z - Steel or Chrome
  • Precision hand lapped to a 3 micro inch finish to provide superior accuracy and optimum finish
  • Manufactured to the high end of the ANSI specifications to provide maximum wearability
  • Final inspection of gages is completed in an environmentally controlled ISO 17025 laboratory
  • Designed for size ranges from 1.510” to 4.510” (38.35 mm - 114.55 mm)
  • Free NIST certificate of accuracy

Please select a measure:


Steel Chrome
Size Range Class Item # Price Sale Price Item # Price Sale Price
1.5101-2.010 XXPTRSI-XX01$205.00$186.00PTRCI-XX01$267.00$241.00
XPTRSI-X01$186.00$169.00PTRCI-X01$242.00$219.00
YPTRSI-Y01$177.00$160.00PTRCI-Y01$230.00$208.00
ZPTRSI-Z01$177.00$160.00PTRCI-Z01$230.00$208.00
2.0101-2.510 XXPTRSI-XX02$287.00$260.00PTRCI-XX02$373.00$338.00
XPTRSI-X02$218.00$197.00PTRCI-X02$283.00$256.00
YPTRSI-Y02$208.00$189.00PTRCI-Y02$271.00$245.00
ZPTRSI-Z02$208.00$189.00PTRCI-Z02$271.00$245.00
2.5101-3.010 XXPTRSI-XX03$322.00$291.00PTRCI-XX03$418.00$378.00
XPTRSI-X03$246.00$223.00PTRCI-X03$320.00$289.00
YPTRSI-Y03$224.00$203.00PTRCI-Y03$291.00$264.00
ZPTRSI-Z03$224.00$203.00PTRCI-Z03$291.00$264.00
3.0101-3.510 XXPTRSI-XX04$383.00$346.00PTRCI-XX04$497.00$450.00
XPTRSI-X04$291.00$264.00PTRCI-X04$379.00$343.00
YPTRSI-Y04$252.00$228.00PTRCI-Y04$328.00$297.00
ZPTRSI-Z04$252.00$228.00PTRCI-Z04$328.00$297.00
3.5101-4.010 XXPTRSI-XX05$447.00$404.00PTRCI-XX05$581.00$525.00
XPTRSI-X05$335.00$304.00PTRCI-X05$436.00$394.00
YPTRSI-Y05$293.00$266.00PTRCI-Y05$381.00$345.00
ZPTRSI-Z05$293.00$266.00PTRCI-Z05$381.00$345.00
4.0101-4.510 XXPTRSI-XX06$509.00$460.00PTRCI-XX06$661.00$598.00
XPTRSI-X06$383.00$346.00PTRCI-X06$497.00$450.00
YPTRSI-Y06$338.00$305.00PTRCI-Y06$439.00$397.00
ZPTRSI-Z06$338.00$305.00PTRCI-Z06$439.00$397.00


Progressive trilock plug gages allow for both the GO and NO GO inspection of a hole with one insertion of the gage. The Progressive trilock style is a single end gage having GO and NO GO members stepped on a single gage. Parts can be inspected quickly with this type of gage. Members are securely attached to a trilock handle with mounting bolts. Gages are ring lapped to size and hand polished providing for superior accuracy and ensuring maximum gage wearability.

Progressive trilock plug gages are available in Class XX, X, Y and Z and are manufactured in accordance to ANSI standards. Available in steel and chrome from 1.510” – 4.510” (38.35 mm - 114.55 mm). WESTport Gage provides a Certificate of Accuracy, traceable to NIST (National Institute of Standards and Technology), free of charge with every gage.

WESTport Manufactured Products. 24th Anniversary Servicing Industry Worldwide (1989-2013)