The Nut,plain,hexagon, cataloged under National Stock Number 5310-01-654-1921, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-654-1921 |
| Item Name | Nut,plain,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Material Document and Classification | IL-DTL-1222 TY 1 GR 400 MIL SPEC 10TH MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.500 INCHES IN |
| Thread Class | 3B |
| Thread Quantity Per Inch | 13 |
| Material | NICKEL ALLOY OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | V |
| Reference | Meaning |
|---|---|
| 111-8540933 ITEM 6 | 3/1 Design control — primary reference Naval Sea Systems Command |
| MIL-DLT-1222 TY I GR400 | 4/1 Identification reference U.S. Government activity |
| 0.500-13UNC-3B NICU | 5/1 Secondary reference Naval Sea Systems Command |
NSN 5310-01-654-1921 is a Nut,plain,hexagon, classified under FSC 5310, Nuts and Washers. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5310-01-659-1042. Verify interchangeability with system specifications before substitution.
Key specifications for 5310-01-654-1921: Thread Series: UNIFIED NATIONAL COARSE (UNC); Material Document and Classification: IL-DTL-1222 TY 1 GR 400 MIL SPEC 10TH MATERIAL RESPONSE OVERALL; Thread Direction: RIGHT-HAND; Nominal Thread Size: 0.500 INCHES IN. 7 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.