The Nut,self-Locking,single Ball Sea, cataloged under National Stock Number 5310-01-602-4138, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Fastenal Company Dba Fastenal Co. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-602-4138 |
| Primary Part Number | 37519 |
| Item Name | Nut,self-Locking,single Ball Sea |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Fastenal Company Dba Fastenal Co |
| Status | ACTIVE |
| Width Across Flats | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | ASTM F1941 YELLOW ZINC FE/ZN 5C ASSN STD SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Nut Height | 0.298 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN |
| Surface Treatment | ZINC OVERALL EXCEPT INSERT |
| Nut Style | SINGLE BALL SEAT, HEXAGON |
| Thread Class | 2B |
| Thread Quantity Per Inch | 20 |
| Material | STEEL OVERALL EXCEPT INSERT |
| Material | PLASTIC NYLON LOCKING INSERT |
| 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 |
|---|---|
| 37519 PRIMARY | Fastenal Company Dba Fastenal Co (USA) |
NSN 5310-01-602-4138 is a Nut,self-Locking,single Ball Sea, manufactured by Fastenal Company Dba Fastenal Co, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-602-4138 has 1 manufacturer part number on file: 37519 (Fastenal Company Dba Fastenal Co).
Key specifications for 37519: Width Across Flats: 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN; Surface Treatment Document and Classification: ASTM F1941 YELLOW ZINC FE/ZN 5C ASSN STD SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT; Thread Series: UNIFIED NATIONAL COARSE (UNC); Thread Direction: RIGHT-HAND. 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.