The Nut,plain,hexagon, cataloged under National Stock Number 5310-00-265-9552, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-265-9552 |
| Primary Part Number | 12Z23PC21 |
| Item Name | Nut,plain,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Width Across Flats | 0.425 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Material Document and Classification | MIL-C-895 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Nondefinitive Spec/std Data | 2 TYPE AND A STYLE AND B STYLE |
| Nut Height | 0.203 INCHES NOMINAL IN |
| Nut Style | HEXAGON |
| Thread Class | 2B |
| Thread Quantity Per Inch | 20 |
| Material | COPPER ALLOY OVERALL |
| Bearing Surface Type | CHAMFERED OR WASHER FACED |
| 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 |
|---|---|
| 12Z23PC21 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| MILB857TYPE2STYLEA0RB | 4/1 Identification reference U.S. Government activity |
| 43N6000 | 5/9 Secondary reference U.S. Government activity |
NSN 5310-00-265-9552 is a Nut,plain,hexagon, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-265-9552 has 1 manufacturer part number on file: 12Z23PC21 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
Key specifications for 12Z23PC21: Width Across Flats: 0.425 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN; Thread Series: UNIFIED NATIONAL COARSE (UNC); Material Document and Classification: MIL-C-895 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Thread Direction: RIGHT-HAND. 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.