The Nut,plain,round, cataloged under National Stock Number 5310-01-421-0503, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 14 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 | 5310-01-421-0503 |
| Primary Part Number | 903-5912047 PIECE 42 |
| Item Name | Nut,plain,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Thread Series | UNEF |
| Hardness Rating | 50.0 ROCKWELL C MINIMUM AND 55.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | ASTM A681 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.438 INCHES IN |
| Nut Diameter | 1.375 INCHES NOMINAL IN |
| Drive Point Depth | 0.250 INCHES NOMINAL IN |
| Nut Thickness | 0.2495 INCHES MINIMUM AND 0.2505 INCHES MAXIMUM IN |
| Drive Point Diameter | 0.141 INCHES NOMINAL IN |
| Drive Point Quantity | 8 |
| Nut Style | ROUND |
| Thread Class | 2B |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP H11 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 |
|---|---|
| 903-5912047 PIECE 42 PRIMARY | Naval Sea Systems Command (USA) |
NSN 5310-01-421-0503 is a Nut,plain,round, manufactured by Naval Sea Systems Command, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-421-0503 has 1 manufacturer part number on file: 903-5912047 PIECE 42 (Naval Sea Systems Command).
Key specifications for 903-5912047 PIECE 42: Thread Series: UNEF; Hardness Rating: 50.0 ROCKWELL C MINIMUM AND 55.0 ROCKWELL C MAXIMUM; Material Document and Classification: ASTM A681 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Thread Direction: RIGHT-HAND. 14 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.