The Nut,self-Locking,round, cataloged under National Stock Number 5310-01-138-5513, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-138-5513 |
| Primary Part Number | ST3M831-10 |
| Item Name | Nut,self-Locking,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-416 TYP 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Temp Rating | 450.0 FAHRENHEIT NOMINAL DEGF |
| Hardness Rating | 43.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | AMS 6304 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.625 INCHES IN |
| Nut Thickness | 0.499 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OR CADMIUM AND CHROMATE OVERALL |
| Thread Class | 3B |
| Thread Quantity Per Inch | 18 |
| Material | STEEL COMP 601 OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| ST3M831-10 PRIMARY | The Boeing Company Div Defense (USA) |
| SP51148-10 | Howmet Global Fastening Systems Inc (USA) |
| 80311-10 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| 113LH11922 10 | 5/9 Secondary reference Harvard Industries Inc |
NSN 5310-01-138-5513 is a Nut,self-Locking,round, manufactured by The Boeing Company Div Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-138-5513 has 3 manufacturer part numbers on file: ST3M831-10 (The Boeing Company Div Defense), SP51148-10 (Howmet Global Fastening Systems Inc), 80311-10 (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for ST3M831-10: Surface Treatment Document and Classification: QQ-416 TYP 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF); Temp Rating: 450.0 FAHRENHEIT NOMINAL DEGF; Hardness Rating: 43.0 ROCKWELL C MAXIMUM. 12 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.