Screw thread insert (STI) taps cut the oversized internal threads required for installing screw thread inserts such as Heli-Coil® and equivalents. Designed for thread repair and reinforcement in steel, stainless steel, aluminum, and alloys, these taps deliver precise, durable internal threads for demanding applications.
All models meet NAS 1222 specifications, making them approved for use in military vehicles and aircraft maintenance. Options include metric and USS/SAE sizes, with notched driving tangs for fast installation and removal. Compatible with standard tap wrenches and production tools, these taps support both MRO (maintenance, repair, operations) and production repair, ensuring long life, repeatable fit, and reliable performance.
Thread Size | Number of Flutes | Measurement Type | Thread Type | Material | Package Qty | Item # |
Price
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#8-32
|
4
|
USS
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Coarse
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Stainless Steel
|
1
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822500
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#10-24
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4
|
USS
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Coarse
|
Stainless Steel
|
1
|
822501
|
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|
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#10-32
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4
|
SAE
|
Fine
|
Stainless Steel
|
1
|
822502
|
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|
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#12-24
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4
|
USS
|
Coarse
|
Stainless Steel
|
1
|
822504
|
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|
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1/4"-20
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4
|
USS
|
Coarse
|
Stainless Steel
|
1
|
822505
|
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|
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1/4"-28
|
4
|
SAE
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Fine
|
Stainless Steel
|
1
|
822506
|
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|
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5/16"-18
|
4
|
USS
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Coarse
|
Stainless Steel
|
1
|
822507
|
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|
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5/16"-24
|
4
|
SAE
|
Fine
|
Stainless Steel
|
1
|
822508
|
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|
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3/8"-16
|
4
|
USS
|
Coarse
|
Stainless Steel
|
1
|
822509
|
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3/8"-24
|
4
|
SAE
|
Coarse
|
Stainless Steel
|
1
|
822510
|
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7/16"-14
|
4
|
USS
|
Coarse
|
Stainless Steel
|
1
|
822511
|
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|
|
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7/16"-20
|
4
|
SAE
|
Fine
|
Stainless Steel
|
1
|
822512
|
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|
|
Thread Size | Number of Flutes | Measurement Type | Thread Type | Material | Package Qty | Item # |
Price
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---|---|---|---|---|---|---|---|
M5 x 0.8
|
4
|
Metric
|
Coarse
|
Stainless Steel
|
1
|
822535
|
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|
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M6 x 1.0
|
4
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Metric
|
Coarse
|
Stainless Steel
|
1
|
822536
|
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|
|
|||||||
M7 x 1.0
|
4
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Metric
|
Coarse
|
Stainless Steel
|
1
|
822537
|
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|
|||||||
M8 x 1.0
|
4
|
Metric
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Fine
|
Stainless Steel
|
1
|
822539
|
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|||||||
M8 x 1.25
|
4
|
Metric
|
Coarse
|
Stainless Steel
|
1
|
822538
|
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|
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|||||||
M10 x 1.25
|
4
|
Metric
|
Fine
|
Stainless Steel
|
1
|
822541
|
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|
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M10 x 1.5
|
4
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Metric
|
Coarse
|
Stainless Steel
|
1
|
822540
|
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M12 x 1.5
|
4
|
Metric
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Fine
|
Stainless Steel
|
1
|
822543
|
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M12 x 1.75
|
4
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Metric
|
Coarse
|
Stainless Steel
|
1
|
822542
|
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|
|||||||
M14 x 1.5
|
4
|
Metric
|
Fine
|
Stainless Steel
|
1
|
822545
|
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M14 x 2.0
|
4
|
Metric
|
Coarse
|
Stainless Steel
|
1
|
822544
|
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|
|
|||||||
M16 x 1.5
|
4
|
Metric
|
Fine
|
Stainless Steel
|
1
|
822547
|
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