The Nut,plain,knurled, cataloged under National Stock Number 5310-01-417-2531, 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 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-417-2531 |
| Primary Part Number | 903-5912048 PIECE 5 |
| Item Name | Nut,plain,knurled |
| 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 |
| Thread Direction | LEFT-HAND |
| Nominal Thread Size | 0.875 INCHES IN |
| Nut Diameter | 1.495 INCHES MINIMUM AND 1.505 INCHES MAXIMUM IN |
| Nut Thickness | 0.870 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN |
| Small End Length | 0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN |
| Small End Diameter | 1.120 INCHES MINIMUM AND 1.130 INCHES MAXIMUM IN |
| Thread Class | 2B |
| Thread Quantity Per Inch | 20 |
| Material | STEEL OVERALL |
| Knurl Width | 0.620 INCHES MINIMUM AND 0.630 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 903-5912048 PIECE 5 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 903-5912048 PIECE 5 | 5/9 Secondary reference U.S. Government activity |
NSN 5310-01-417-2531 is a Nut,plain,knurled, manufactured by Naval Sea Systems Command, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-417-2531 has 1 manufacturer part number on file: 903-5912048 PIECE 5 (Naval Sea Systems Command).
Key specifications for 903-5912048 PIECE 5: Thread Series: UNEF; Hardness Rating: 50.0 ROCKWELL C MINIMUM AND 55.0 ROCKWELL C MAXIMUM; Thread Direction: LEFT-HAND; Nominal Thread Size: 0.875 INCHES IN. 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.