The Nut,plain,knurled, cataloged under National Stock Number 5310-00-623-1684, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-623-1684 |
| Item Name | Nut,plain,knurled |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Hole Thread Quantity Per Inch | 32 |
| Surface Treatment Document and Classification | MIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNF |
| Hole Configuration Style | CONFIGURATION J |
| Material Document and Classification | QQ-A-354 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-225/4 FED SPEC 2ND MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.190 INCHES IN |
| Nut Diameter | 0.625 INCHES NOMINAL IN |
| Nut Thickness | 0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN |
| Surface Treatment | OXIDE FILM OVERALL |
| Countersink Angle | 89.0 DEGREES MINIMUM AND 91.0 DEGREES MAXIMUM NUT |
| Nut Style | KNURLED |
| Thread Class | 2B |
| Hole Nominal Thread Diameter | 0.138 INCHES IN |
| Thread Quantity Per Inch | 32 |
| Material | ALUMINUM ALLOY 2024 OR ALUMINUM ALLOY 2017 OVERALL |
| Hole Type and Quantity | 1 TAPPED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| SM3578 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-00-623-1684 is a Nut,plain,knurled, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-623-1684: Hole Thread Quantity Per Inch: 32; Surface Treatment Document and Classification: MIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNF; Hole Configuration Style: CONFIGURATION J. 17 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.