Thread Size Thread Size |
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For Thread Direction For Thread Direction |
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Installed Length Installed Length |
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Thread Direction Thread Direction |
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![]() | ![]() |
Right Hand | Left Hand |
For Minimum Material Thickness For MinimumMaterial Thickness |
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Thread Spacing Thread Spacing |
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For Maximum Hole Diameter For Maximum Hole Diameter |
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Drill Bit Size Drill Bit Size |
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Screw an insert onto these tools and drive them a quarter to half-turn below the material’s surface. They’re compatible with helical inserts that have a prong.
Style B cannot be used with screw-lock inserts.
For Thread Size | Style | Each | |
For Right-Hand Thread | |||
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1-64 | H | 000000000 | 0000000 |
2-56 | E | 000000000 | 00000 |
4-40 | A | 000000000 | 00000 |
4-40 | B | 000000000 | 00000 |
6-32 | A | 000000000 | 00000 |
6-32 | B | 000000000 | 00000 |
8-32 | B | 000000000 | 00000 |
8-36 | A | 000000000 | 000000 |
10-24 | A | 000000000 | 00000 |
10-32 | A | 000000000 | 00000 |
10-32 | B | 000000000 | 00000 |
12-24 | A | 000000000 | 000000 |
1/4"-20 | A | 000000000 | 00000 |
1/4"-28 | A | 000000000 | 00000 |
5/16"-18 | A | 000000000 | 000000 |
5/16"-18 | B | 000000000 | 00000 |
5/16"-24 | A | 000000000 | 000000 |
3/8"-16 | A | 000000000 | 000000 |
3/8"-16 | B | 000000000 | 00000 |
3/8"-24 | A | 000000000 | 000000 |
7/16"-14 | A | 000000000 | 000000 |
7/16"-14 | B | 000000000 | 00000 |
7/16"-20 | A | 000000000 | 000000 |
1/2"-13 | A | 000000000 | 000000 |
1/2"-13 | B | 000000000 | 00000 |
1/2"-20 | A | 000000000 | 000000 |
9/16"-12 | C | 000000000 | 00000 |
9/16"-18 | D | 000000000 | 000000 |
5/8"-11 | B | 000000000 | 00000 |
5/8"-11 | C | 000000000 | 00000 |
5/8"-18 | D | 000000000 | 000000 |
3/4"-10 | B | 000000000 | 00000 |
3/4"-10 | C | 000000000 | 00000 |
3/4"-16 | D | 000000000 | 000000 |
7/8"-9 | C | 000000000 | 00000 |
7/8"-14 | D | 000000000 | 000000 |
1"-8 | C | 000000000 | 00000 |
1"-12 | D | 000000000 | 000000 |
1"-14 | D | 000000000 | 000000 |
1 1/4"-7 | C | 000000000 | 00000 |
1 1/4"-12 | D | 000000000 | 000000 |
For Left-Hand Thread | |||
5/16"-18 | F | 000000000 | 00000 |
3/8"-24 | F | 000000000 | 00000 |
1/2"-13 | G | 000000000 | 00000 |
1/2"-20 | G | 000000000 | 00000 |
5/8"-11 | G | 000000000 | 00000 |
For Thread | ||||
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Size | Pitch, mm | Style | Each | |
For Right-Hand Thread | ||||
M2 | 0.4 | H | 000000000 | 0000000 |
M2.2 | 0.45 | E | 000000000 | 00000 |
M2.5 | 0.45 | A | 000000000 | 000000 |
M3 | 0.5 | A | 000000000 | 00000 |
M3.5 | 0.6 | A | 000000000 | 00000 |
M4 | 0.7 | A | 000000000 | 00000 |
M5 | 0.8 | A | 000000000 | 00000 |
M6 | 1 | A | 000000000 | 00000 |
M8 | 1.25 | A | 000000000 | 000000 |
M8 | 1 | A | 000000000 | 000000 |
M10 | 1 | A | 000000000 | 000000 |
M12 | 1.5 | A | 000000000 | 000000 |
M12 | 1.25 | A | 000000000 | 000000 |
M14 | 1.5 | A | 000000000 | 000000 |
M18 | 2.5 | E | 000000000 | 000000 |
Inserts come with a through-hole tap and installation tool. Also known as Heli-Coil inserts, they have coils that expand once installed to securely anchor the insert. All have a prong for ease of installation. An installation tool grips the prong and reduces the coil diameter, enabling the insert to fit in tapped holes. Remove the prong to insert the screw.
Thread Size | Installed Lg. | Drill Bit Size | For Max. Hole Dia. | No. of Inserts Included | Includes | Each | |
18-8 Stainless Steel—Right-Hand Threaded | |||||||
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2-56 | 0.129" | 3/32" | 3/32" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 000000 |
4-40 | 0.168" | No. 31 | 0.12" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
6-32 | 0.207" | No. 25 | 0.1495" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
6-32 | 0.276" | No. 25 | 0.1495" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
8-32 | 0.246" | 11/64" | 11/64" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
8-32 | 0.328" | 11/64" | 11/64" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
10-24 | 0.285" | 13/64" | 13/64" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
10-32 | 0.19" | 13/64" | 13/64" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
10-32 | 0.285" | 13/64" | 13/64" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
10-32 | 0.38" | 13/64" | 13/64" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
12-24 | 0.324" | 15/64" | 15/64" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
1/4"-20 | 3/8" | 17/64" | 17/64" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
1/4"-20 | 1/2" | 17/64" | 17/64" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
1/4"-28 | 3/8" | 17/64" | 17/64" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
5/16"-18 | 0.469" | 21/64" | 21/64" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
5/16"-18 | 5/8" | 21/64" | 21/64" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
5/16"-24 | 0.469" | 21/64" | 21/64" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
3/8"-16 | 0.562" | 25/64" | 25/64" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
3/8"-16 | 3/4" | 25/64" | 25/64" | 5 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
3/8"-24 | 0.562" | 25/64" | 25/64" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
7/16"-14 | 0.656" | 29/64" | 29/64" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
7/16"-20 | 0.656" | 29/64" | 29/64" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
1/2"-13 | 3/4" | 17/32" | 17/32" | 5 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
1/2"-20 | 3/4" | 33/64" | 33/64" | 5 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
5/8"-11 | 0.938" | 21/32" | 21/32" | 6 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 000000 |
5/8"-18 | 0.938" | 41/64" | 41/64" | 6 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 000000 |
1"-12 | 1 1/2" | 1 1/64" | 1 1/64" | 6 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 000000 |
1"-14 | 1 1/2" | 1 1/64" | 1 1/64" | 6 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 000000 |
1 1/8"-12 | 1.688" | 1 5/32" | 1 5/32" | 5 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 000000 |
1 1/4"-12 | 1 7/8" | 1 9/32" | 1 9/32" | 4 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 000000 |
1 1/2"-12 | 2 1/4" | 1 17/32" | 1 17/32" | 4 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 000000 |
18-8 Stainless Steel—Left-Hand Threaded | |||||||
1/4"-20 | 3/8" | 17/64" | 17/64" | 6 | Through-Hole Tap, Installation Tool | 000000000 | 00000 |
1/4"-28 | 3/8" | 17/64" | 17/64" | 6 | Through-Hole Tap, Installation Tool | 000000000 | 00000 |
5/16"-18 | 0.469" | 21/64" | 21/64" | 6 | Through-Hole Tap, Installation Tool | 000000000 | 00000 |
5/16"-24 | 0.469" | 21/64" | 21/64" | 6 | Through-Hole Tap, Installation Tool | 000000000 | 00000 |
3/8"-16 | 0.562" | 25/64" | 25/64" | 6 | Through-Hole Tap, Installation Tool | 000000000 | 00000 |
3/8"-24 | 0.562" | 25/64" | 25/64" | 6 | Through-Hole Tap, Installation Tool | 000000000 | 00000 |
1/2"-13 | 3/4" | 17/32" | 17/32" | 4 | Through-Hole Tap, Installation Tool | 000000000 | 000000 |
1/2"-20 | 3/4" | 33/64" | 33/64" | 4 | Through-Hole Tap, Installation Tool | 000000000 | 000000 |
5/8"-11 | 0.938" | 21/32" | 21/32" | 2 | Through-Hole Tap, Installation Tool | 000000000 | 000000 |
5/8"-18 | 0.938" | 41/64" | 41/64" | 2 | Through-Hole Tap, Installation Tool | 000000000 | 000000 |
3/4"-10 | 1 1/8" | 25/32" | 25/32" | 2 | Through-Hole Tap, Installation Tool | 000000000 | 000000 |
Thread Size | Thread Pitch, mm | Thread Spacing | Installed Lg., mm | Drill Bit Size | For Max. Hole Dia. | No. of Inserts Included | Includes | Each | |
18-8 Stainless Steel—Right-Hand Threaded | |||||||||
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M2.5 | 0.45 | Coarse | 3.8 | No. 38 | 0.1015" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 0000000 |
M3 | 0.5 | Coarse | 4.5 | 1/8" | 1/8" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
M3 | 0.5 | Coarse | 6 | 1/8" | 1/8" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 000000 |
M4 | 0.7 | Coarse | 4 | 11/64" | 11/64" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
M4 | 0.7 | Coarse | 6 | 11/64" | 11/64" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
M4 | 0.7 | Coarse | 8 | 11/64" | 11/64" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
M5 | 0.8 | Coarse | 7.5 | 13/64" | 13/64" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
M5 | 0.8 | Coarse | 10 | 13/64" | 13/64" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
M6 | 1 | Coarse | 6 | 1/4" | 1/4" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
M6 | 1 | Coarse | 9 | 1/4" | 1/4" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
M6 | 1 | Coarse | 12 | 1/4" | 1/4" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
M7 | 1 | Coarse | 10.5 | 9/32" | 9/32" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
M8 | 1.25 | Coarse | 12 | 21/64" | 21/64" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
M8 | 1.25 | Coarse | 16 | 21/64" | 21/64" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 000000 |
M10 | 1.5 | Coarse | 15 | 13/32" | 13/32" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
M10 | 1 | Extra Fine | 15 | 13/32" | 13/32" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
M12 | 1.5 | Fine | 18 | 31/64" | 31/64" | 5 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
M12 | 1.25 | Extra Fine | 18 | 31/64" | 31/64" | 5 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
M14 | 2 | Coarse | 21 | 37/64" | 37/64" | 12 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 000000 |
M14 | 1.5 | Fine | 21 | 9/16" | 9/16" | 5 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
M16 | 2 | Coarse | 24 | 21/32" | 21/32" | 6 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 000000 |
M18 | 2.5 | Coarse | 27 | 47/64" | 47/64" | 6 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 000000 |
M20 | 2.5 | Coarse | 30 | 13/16" | 13/16" | 4 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 000000 |
M24 | 3 | Coarse | 36 | 31/32" | 31/32" | 5 | Through-Hole Tap, Installation Tool | 000000000 | 000000 |
M30 | 3.5 | Coarse | 45 | 1 1/4" | 1 1/4" | 5 | Through-Hole Tap, Installation Tool | 000000000 | 000000 |
M36 | 4 | Coarse | 54 | 1 7/16" | 1 7/16" | 4 | Through-Hole Tap, Installation Tool | 000000000 | 000000 |
Pipe Size | Installed Lg. | Drill Bit Size | For Max. Hole Dia. | No. of Inserts Included | Includes | Each | |
18-8 Stainless Steel—Right-Hand Threaded | |||||||
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1/8 | 0.273" | 3/8" | 3/8" | 12 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 0000000 |
1/4 | 0.394" | 33/64" | 33/64" | 12 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 000000 |
3/8 | 0.407" | 21/32" | 21/32" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 000000 |