inserts › screw thread inserts
MS51831CA202L
Military Standard Screw Thread Insert
Description
Thread Size: 1/4", Thread Length: 1/4", stainless steel, dry film lubricant, MS51831 series insert
Specifications
| Features Provided | Individually keyed |
|---|---|
| Full Internal Thread Length | Between 0.280 inches and 0.330 inches |
| Insert Size | 7/16-14 unc (coarse thread) 2a |
| Internal Thread Relief Depth | Between 0.060 inches and 0.080 inches |
| Length | Between 0.360 inches and 0.390 inches |
| Material | CRES |
| Special Features | Dry film lubricant. has internal thread lock |
| Style Designator | Keylock |
| Surface Treatment | Passivate |
| Thread Class | 3b |
| Thread Direction | Right-hand |
| Thread Length | 0.305 |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series | UNJF |
| Thread Series Designator | Unjf (fine thread with external controlled root radius) |
| Thread Size | 0.250 |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
Cross-reference
Similar parts
Parts with matching key dimensions — often from a different standards family. Candidates for comparison only; verify the full specification before substituting.
- NAS1395CA4L NAS 1/4-28 · 25/64 in · Steel
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Catalog data updated 2026-07-05. Report a data error