Clear All
System of Measurement System of Measurement |
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Thread Type Thread Type | Show |
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Threaded Insert Type Threaded Insert Type |
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 | Key Locking |
Specifications Met Specifications Met |
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For Tap Thread Size For Tap Thread Size |
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Material Material |
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Finish Finish |
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Thread Fit Thread Fit |
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For Use In For Use In |
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Tensile Strength Tensile Strength |
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For Maximum Hole Diameter For Maximum Hole Diameter |
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External Locking Type External Locking Type |
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End Type End Type |
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Thread Spacing Thread Spacing |
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For Tap Type For Tap Type |
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Thread Direction Thread Direction |
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How to Install Key-Locking Inserts
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Mil. Spec. Alloy Steel Key-Locking Inserts
The strongest key-locking inserts we offer, these inserts are made to stringent military specifications. Drive the keys into the surrounding material for a more secure hold than thread-locking inserts. Use them to repair or change threads in soft metals such as aluminum. Inserts may be mildly magnetic. They’re comparable to Keensert® inserts. Installation requires a drill bit, a standard tap, an installation tool, and a hammer.
Inserts with a thin wall are often used in small holes or near the edge of a workpiece.
Choose inserts with a thick wall for greater strength than thin-wall inserts, or to fill a large hole.
For technical drawings and 3-D models, click on a part number.
Inch
Inserts | Installation Tools | |||||||||
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| Thread Size | For Tap Thread Size | Installed Lg. | Drill Bit Size | For Max. Hole Dia. | No. of Locking Keys | Specifications Met | Each | Each | ||
Cadmium-Plated Alloy Steel with Thin Wall | ||||||||||
| 10-32 | 5/16"-18 | 5/16" | 17/64" | 17/64" | 2 | MS51830-A201, NAS1394-3 | 000000000 | 00000 | 000000000 | 000000 |
| 1/4"-28 | 3/8"-16 | 3/8" | 21/64" | 21/64" | 2 | MS51830-A202, NAS1394-4 | 000000000 | 0000 | 000000000 | 00000 |
| 5/16"-24 | 7/16"-14 | 7/16" | 25/64" | 25/64" | 4 | MS51830-A203, NAS1394-5 | 000000000 | 0000 | 000000000 | 00000 |
| 3/8"-24 | 1/2"-13 | 1/2" | 29/64" | 29/64" | 4 | MS51830-A204, NAS1394-6 | 000000000 | 0000 | 000000000 | 00000 |
| 7/16"-20 | 9/16"-12 | 9/16" | 33/64" | 33/64" | 4 | MS51830-A205, NAS1394-7 | 000000000 | 0000 | 000000000 | 00000 |
| 1/2"-20 | 5/8"-11 | 5/8" | 37/64" | 37/64" | 4 | MS51830-A206, NAS1394-8 | 000000000 | 0000 | 000000000 | 00000 |
Cadmium-Plated Alloy Steel with Thick Wall | ||||||||||
| 10-32 | 3/8"-16 | 5/16" | 21/64" | 21/64" | 2 | MS51831-A201, NAS13953 | 000000000 | 00000 | 000000000 | 00000 |
| 1/4"-28 | 7/16"-14 | 3/8" | 25/64" | 25/64" | 2 | MS51831-A202, NAS1395-4 | 000000000 | 0000 | 000000000 | 00000 |
| 5/16"-24 | 1/2"-13 | 7/16" | 29/64" | 29/64" | 4 | MS51831-A203 | 000000000 | 0000 | 000000000 | 00000 |
| 3/8"-24 | 9/16"-12 | 1/2" | 33/64" | 33/64" | 4 | MS51831-A204 | 000000000 | 0000 | 000000000 | 00000 |
| 7/16"-20 | 5/8"-11 | 5/8" | 37/64" | 37/64" | 4 | MS51831-A205, NAS1395-7 | 000000000 | 0000 | 000000000 | 00000 |
| 1/2"-20 | 11/16"-11 | 11/16" | 41/64" | 41/64" | 4 | MS51831-A206, NAS1395-8 | 000000000 | 0000 | 000000000 | 00000 |
| 9/16"-18 | 13/16"-16 | 13/16" | 49/64" | 49/64" | 4 | MS51831-A207, NAS1395-9 | 000000000 | 00000 | 000000000 | 00000 |
| 5/8"-18 | 7/8"-14 | 7/8" | 53/64" | 53/64" | 4 | MS51831-A209, NAS1395-10 | 000000000 | 00000 | 000000000 | 00000 |
| 3/4"-16 | 1 1/8"-12 | 1 1/8" | 1 1/16" | 1 1/16" | 4 | MS51831-A209 | 000000000 | 00000 | 000000000 | 000000 |