Screw Thread Insert Taps

Stripped threads kill uptime. These STI taps cut the oversized insert thread that Perma-Thread coils lock into so you get a permanent standard screw thread back in aluminum, cast or steel. Choose USS-SAE or metric to match the fastener. Built for NAS 1222 work including MS 21208 and MS 21209 applications.

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USS & SAE Perma-Thread Insert STI Taps

Metric Perma-Thread Insert STI Taps

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USS & SAE Perma-Thread Insert STI Taps

Perma-Thread STI taps are stainless steel taps designed for installing helically coiled Perma-Thread inserts. Precision diamond‑shaped coil inserts install with a notched driving tang and expand to anchor in tapped holes. Meets NAS 1222 specifications and suitable for military and aerospace use.

Thread Size	Number of Flutes	Measurement Type	Thread Type	Material	Package Qty	Item #	Price Want to view pricing for this product? Log In or Create Login Not a Kimball Midwest Customer? Register
#8-32	4	USS	Coarse	Stainless Steel	1	822500	Log in to view price
#8-32 Perma-Thread Insert STI Tap Item #: 822500 Package Weight: 0 lbs View Product Details Log in to Order
#10-24	4	USS	Coarse	Stainless Steel	1	822501	Log in to view price
#10-24 Perma-Thread Insert STI Tap Item #: 822501 Package Weight: 0.1 lbs View Product Details Log in to Order
#10-32	4	SAE	Fine	Stainless Steel	1	822502	Log in to view price
#10-32 Perma-Thread Insert STI Tap Item #: 822502 Package Weight: 0.1 lbs View Product Details Log in to Order
#12-24	4	USS	Coarse	Stainless Steel	1	822504	Log in to view price
#12-24 Perma-Thread Insert STI Tap Item #: 822504 Package Weight: 0.1 lbs View Product Details Log in to Order
1/4"-20	4	USS	Coarse	Stainless Steel	1	822505	Log in to view price
1/4-20 Perma-Thread Insert STI Tap Item #: 822505 Package Weight: 0.1 lbs View Product Details Log in to Order
1/4"-28	4	SAE	Fine	Stainless Steel	1	822506	Log in to view price
1/4-28 Perma-Thread Insert STI Tap Item #: 822506 Package Weight: 0.1 lbs View Product Details Log in to Order
5/16"-18	4	USS	Coarse	Stainless Steel	1	822507	Log in to view price
5/16-18 Perma-Thread Insert STI Tap Item #: 822507 Package Weight: 0.1 lbs View Product Details Log in to Order
5/16"-24	4	SAE	Fine	Stainless Steel	1	822508	Log in to view price
5/16-24 Perma-Thread Insert STI Tap Item #: 822508 Package Weight: 0.1 lbs View Product Details Log in to Order
3/8"-16	4	USS	Coarse	Stainless Steel	1	822509	Log in to view price
3/8-16 Perma-Thread Insert STI Tap Item #: 822509 Package Weight: 0.1 lbs View Product Details Log in to Order
3/8"-24	4	SAE	Coarse	Stainless Steel	1	822510	Log in to view price
3/8-24 Perma-Thread Insert STI Tap Item #: 822510 Package Weight: 0.1 lbs View Product Details Log in to Order
7/16"-14	4	USS	Coarse	Stainless Steel	1	822511	Log in to view price
7/16-14 Perma-Thread Insert STI Tap Item #: 822511 Package Weight: 0.1 lbs View Product Details Log in to Order
7/16"-20	4	SAE	Fine	Stainless Steel	1	822512	Log in to view price
7/16-20 Perma-Thread Insert STI Tap Item #: 822512 Package Weight: 0.1 lbs View Product Details Log in to Order

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Metric Perma-Thread Insert STI Taps

Metric Perma-Thread insert STI taps are helically coiled stainless steel inserts made from 18-8 wire that form permanent screw threads. The notched driving tang eases installation and removal and the coil expands to anchor in tapped holes. Meets NAS 1222 specifications.

Thread Size	Number of Flutes	Measurement Type	Thread Type	Material	Package Qty	Item #	Price Want to view pricing for this product? Log In or Create Login Not a Kimball Midwest Customer? Register
M5 x 0.8	4	Metric	Coarse	Stainless Steel	1	822535	Log in to view price
M5 x 0.8 Perma-Thread Insert STI Tap Item #: 822535 Package Weight: 0.1 lbs View Product Details Log in to Order
M6 x 1.0	4	Metric	Coarse	Stainless Steel	1	822536	Log in to view price
M6 x 1.0 Perma-Thread Insert STI Tap Item #: 822536 Package Weight: 0.1 lbs View Product Details Log in to Order
M7 x 1.0	4	Metric	Coarse	Stainless Steel	1	822537	Log in to view price
M7 x 1.0 Perma-Thread Insert STI Tap Item #: 822537 Package Weight: 0.1 lbs View Product Details Log in to Order
M8 x 1.0	4	Metric	Fine	Stainless Steel	1	822539	Log in to view price
M8 x 1.0 Perma-Thread Insert STI Tap Item #: 822539 Package Weight: 0.1 lbs View Product Details Log in to Order
M8 x 1.25	4	Metric	Coarse	Stainless Steel	1	822538	Log in to view price
M8 x 1.25 Perma-Thread Insert STI Tap Item #: 822538 Package Weight: 0.1 lbs View Product Details Log in to Order
M10 x 1.25	4	Metric	Fine	Stainless Steel	1	822541	Log in to view price
M10 x 1.25 Perma-Thread Insert STI Tap Item #: 822541 Package Weight: 0.1 lbs View Product Details Log in to Order
M10 x 1.5	4	Metric	Coarse	Stainless Steel	1	822540	Log in to view price
M10 x 1.5 Perma-Thread Insert STI Tap Item #: 822540 Package Weight: 0.1 lbs View Product Details Log in to Order
M12 x 1.5	4	Metric	Fine	Stainless Steel	1	822543	Log in to view price
M12 x 1.5 Perma-Thread Insert STI Tap Item #: 822543 Package Weight: 0.2 lbs View Product Details Log in to Order
M12 x 1.75	4	Metric	Coarse	Stainless Steel	1	822542	Log in to view price
M12 x 1.75 Perma-Thread Insert STI Tap Item #: 822542 Package Weight: 0.2 lbs View Product Details Log in to Order
M14 x 1.5	4	Metric	Fine	Stainless Steel	1	822545	Log in to view price
M14 x 1.5 Perma-Thread Insert STI Tap Item #: 822545 Package Weight: 0.2 lbs View Product Details Log in to Order
M14 x 2.0	4	Metric	Coarse	Stainless Steel	1	822544	Log in to view price
M14 x 2.0 Perma-Thread Insert STI Tap Item #: 822544 Package Weight: 0.3 lbs View Product Details Log in to Order
M16 x 1.5	4	Metric	Fine	Stainless Steel	1	822547	Log in to view price
M16 x 1.5 Perma-Thread Insert STI Tap Item #: 822547 Package Weight: 0.3 lbs View Product Details Log in to Order