inserts › screw thread inserts
MS51831-201
Military Standard Screw Thread Insert
Description
Screw Thread Insert
Specifications
| Alternate Item Number | NAS1395 |
|---|---|
| Alternate Part Number | NAS1395 NAS1395C3 |
| External Thread Size | 0.3750-16 |
| Features | Heavy-Duty |
| Full Internal Thread Length | 0.240 |
| Industry Standards/Certification | MS51831 |
| Insert Size | 0.375-16 unc (coarse thread) class 2a |
| Internal Thread Relief Depth | 0.070 |
| Internal Thread Size | 0.1900-32 |
| Length | 0.310, 0.312 in |
| Locking Tabs | 2 |
| Material | CRES |
| Material Specification | Ams 5640 comp 303/303e assn standard single material response or astm a582 comp 303/303e assn standard single material response |
| NIIN | 00-713-4765 |
| NSN | 5325-00-713-4765 |
| Specification Data | 80205-nas1395 professional/industrial association standard |
| Style Designator | Keylock |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Class 3 federal specification single treatment response type 2 qq-p-416 |
| Thread Class | 3b |
| Thread Direction | Right-hand |
| Thread Length | 0.242 |
| Thread Qty | 32 |
| Thread Qty Per Inch (tpi) | 32 |
| Thread Series | UNJF |
| Thread Series Designator | Unjf (fine thread with external controlled root radius) |
| Thread Size | 0.190 |
| Weight | .005 lb |
Cross-reference
Interchangeable
Parts that share a National Stock Number or are listed as an alternate for MS51831-201 — functionally equivalent.
- NAS1395C3 Listed alternate 5/16 in · CRES
Similar parts
Parts with matching key dimensions — often from a different standards family. Candidates for comparison only; verify the full specification before substituting.
- NAS1395-3 NAS #10-32 · 5/16 in · CRES
- NAS1395C3L NAS #10-32 · 5/16 in · CRES
- MS51831-201L MS #10-32 · 5/16 in · CRES
- MS51831CA201L MS #10-32 · 5/16 in · Iron
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Catalog data updated 2026-07-05. Report a data error