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MS51831-202L
Military Standard Screw Thread Insert
Description
Screw Thread Insert
Specifications
| Alternate Item Number | NAS1395 |
|---|---|
| Alternate Part Number | NAS1395 KNHL428J |
| External Thread Size | 0.4375-14 |
| Features | Heavy-Duty |
| Features Provided | Individually keyed |
| Full Internal Thread Length | 0.305 |
| Industry Standards/Certification | MS51831 |
| Insert Size | 0.437 in.-14 |
| Internal Thread Relief Depth | 0.070 |
| Internal Thread Size | 0.2500-28 |
| Length | 0.375 |
| Locking Tabs | 2 |
| Material | CRES |
| Material Specification | Ams 5640 comp 303/303e assn standard single material response or stm a582 comp 303/303e assn standard single material response |
| NIIN | 00-236-3612 |
| NSN | 5325-00-236-3612 |
| Special Features | Has internal thread lock |
| Style Designator | Keylock |
| Surface Treatment | Passivate |
| Surface Treatment Specification | Qq-p-35 federal specification single treatment response |
| Thread Class | 3b |
| Thread Direction | Right-hand |
| Thread Length | 0.305 |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series | UNF |
| Thread Series Designator | Unf (fine thread) |
| Thread Size | 0.250 |
| Thread Type | Internal Thread Lock |
| Weight | .005 lb |
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.
- NAS1395-4 NAS 1/4-28 · 3/8 in · Steel
- NAS1395-4L NAS 1/4-28 · 3/8 in · Steel
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Catalog data updated 2026-07-05. Report a data error