S.T.I. Thread Plug Gages

Helical coil ( STI ) Plug Gages are used to gage threaded holes prior to insertion of screw thread inserts. Screw thread inserts are used to repair a damaged thread or to provide stronger thread assembly. All Helical Coil ‐ STI thread plug gages are manufactured of oil hardened tool steel to a class X tolerance. Class W tolerance thread plug gages priced on request.

SKU Description Size Go Length NoGo Length Pitch Diameter Each
STI-5/16-18-2B-GO 5/16-18 UNC 2B STI Go Plug-Class X 5/163/43/8.3486"
$47.00
STI-5/16-18-2B-NGO 5/16-18 UNC 2B STI NoGo Plug-Class X 5/163/43/8.3529"
$47.00
STI-5/16-18-2B-D/E 5/16-18 UNC 2B STI Go/NoGo Thread Plug Gage w/handle-Class X 5/163/43/8.3486" - .3529"
$105.00
STI-5/16-18-3B-GO 5/16-18 UNC 3B STI Go Plug-Class X 5/163/43/8.3486"
$47.00
STI-5/16-18-3B-NGO 5/16-18 UNC 3B STI NoGo Plug-Class X 5/163/43/8.3515"
$47.00
STI-5/16-18-3B-D/E 5/16-18 UNC 3B STI Go/NoGo Thread Plug Gage w/handle-Class X 5/163/43/8.3486" - .3515"
$105.00
STI-5/16-24-2B-GO 5/16-24 UNF 2B STI Go Plug-Class X 5/163/43/8.3395"
$47.00
STI-5/16-24-2B-NGO 5/16-24 UNF 2B STI NoGo Plug-Class X 5/163/43/8.3433"
$47.00
STI-5/16-24-2B-D/E 5/16-24 UNF 2B STI Go/NoGo Thread Plug Gage w/handle-Class X 5/163/43/8.3395" - 3433"
$105.00
STI-5/16-24-3B-GO 5/16-24 UNF 3B STI Go Plug-Class X 5/163/43/8.3395"
$47.00
STI-5/16-24-3B-NGO 5/16-24 UNF 3B STI NoGo Plug-Class X 5/163/43/8.3421"
$47.00
STI-5/16-24-3B-D/E 5/16-24 UNF 3B STI Go/NoGo Thread Plug Gage w/handle-Class X 5/163/43/8.3395" - 3421"
$105.00
STI-3/8-16-2B-GO 3/8-16 UNC 2B STI Go Plug-Class X 3/83/43/8.4156"
$49.00
STI-3/8-16-2B-NGO 3/8-16 UNC 2B STI NoGo Plug-Class X 3/83/43/8.4203"
$49.00
STI-3/8-16-2B-D/E 3/8-16 UNC 2B STI Go/NoGo Thread Plug Gage w/handle-Class X 3/83/43/8.4156" - .4203"
$110.00
STI-3/8-16-3B-GO 3/8-16 UNC 3B STI Go Plug-Class X 3/83/43/8.4156"
$49.00
STI-3/8-16-3B-NGO 3/8-16 UNC 3B STI NoGo Plug Class-X 3/83/43/8.4189"
$49.00
STI-3/8-16-3B-D/E 3/8-16 UNC 3B STI Go/NoGo Thread Plug Gage w/handle-Class X 3/83/43/8.4156" - .4189"
$110.00
STI-3/8-24-2B-GO 3/8-24 UNF 2B STI Go Plug-Class X 3/83/43/8.4020"
$49.00
STI-3/8-24-2B-NGO 3/8-24 UNF 2B STI NoGo Plug-Class X 3/83/43/8.4059"
$49.00
STI-3/8-24-2B-D/E 3/8-24 UNF 2B STI Go/NoGo Thread Plug Gage w/handle-Class X 3/83/43/8.4020" - .4059"
$110.00
STI-3/8-24-3B-GO 3/8-24 UNF 3B STI Go Plug-Class X 3/83/43/8.4020"
$49.00
STI-3/8-24-3B-NGO 3/8-24 UNF 3B STI NoGo Plug-Class X 3/83/43/8.4047"
$49.00
STI-3/8-24-3B-D/E 3/8-24 UNF 3B STI Go/NoGo Thread Plug Gage w/handle-Class X 3/83/43/8.4020" - .4047"
$110.00
STI-7/16-14-2B-GO 7/16-14 UNC 2B STI Go Plug-Class X 7/167/81/2.4839"
$51.00
STI-7/16-14-2B-NGO 7/16-14 UNC 2B STI NoGo Plug-Class X 7/167/81/2.4890"
$51.00
STI-7/16-14-2B-D/E 7/16-14 UNC 2B STI Go/NoGo Thread Plug Gage w/handle-Class X 7/167/81/2.4839" - .4890"
$114.00
STI-7/16-14-3B-GO 7/16-14 UNC 3B STI Go Plug-Class X 7/167/81/2.4839"
$51.00
STI-7/16-14-3B-NGO 7/16-14 UNC 3B STI NoGo Plug-Class X 7/167/81/2.4875"
$51.00
STI-7/16-14-3B-D/E 7/16-14 UNC 3B STI Go/NoGo Thread Plug Gage w/handle-Class X 7/167/81/2.4839" - .4875"
$114.00
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