The Nut,plain,hexagon, cataloged under National Stock Number 5310-01-212-5689, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-212-5689 |
| Item Name | Nut,plain,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Width Across Flats | 2.119 INCHES MINIMUM AND 2.188 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-P-16232 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UN |
| Hardness Rating | 24.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM |
| Criticality Code Justification | ZZZY |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 1.375 INCHES IN |
| Nut Height | 1.310 INCHES MINIMUM AND 1.378 INCHES MAXIMUM IN |
| Surface Treatment | PHOSPHATE OVERALL |
| Nut Style | HEXAGON |
| Thread Class | 2B |
| Thread Quantity Per Inch | 8 |
| Material | STEEL OVERALL |
| Bearing Surface Type | WASHER FACED |
| Reference Number Differentiating Characteristics | MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL F — Mutilate — Cut |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Reference | Meaning |
|---|---|
| 1.375-008UN-2B LEVEL 1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 688-1864 APPX 1 | 3/1 Design control — primary reference U.S. Government activity |
NSN 5310-01-212-5689 is a Nut,plain,hexagon, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-212-5689: Width Across Flats: 2.119 INCHES MINIMUM AND 2.188 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-P-16232 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UN; Hardness Rating: 24.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM. 15 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.
NSN 5310-01-212-5689 has DEMIL Code F. Demilitarization may be required before disposal or transfer to non-military entities.
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.