The Nut,self-Locking,hexagon, cataloged under National Stock Number 5310-00-211-3432, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 10 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 11 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-211-3432 |
| Primary Part Number | NAS1021A7 |
| Item Name | Nut,self-Locking,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANT OR SOLUBLE LUBRICANT |
| Width Across Flats | 0.679 INCHES MINIMUM AND 0.690 INCHES MAXIMUM IN |
| Bearing Surface Finish | 125.0 MICROINCHES |
| Surface Treatment Document and Classification | QQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Temp Rating | 450.0 FAHRENHEIT NOMINAL DEGF |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.438 INCHES IN |
| Specification/standard Data | 80205-NAS1021 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Nut Height | 0.489 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Countersink Angle | 120.0 DEGREES NOMINAL NUT |
| Nut Style | HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 20 |
| Material | STEEL 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 |
|---|---|
| NAS0121A7 | Satair A/s (DNK) |
| NAS1021A7 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| NAS1021A7 | Hardware Specialty Co. Inc. Dba Hardware Specialty Co Inc (USA) |
| NAS1021A7 | Esna, Llc (USA) |
| NAS0121A7 | Plastic and Metal Products Corporation (USA) |
| NAS1021A7 | Nor-Cal Supply Co (USA) |
| JL2S720UN | Satair A/s (DNK) |
| NAS1021A7 PRIMARY | Qualified Air Components Inc. (USA) |
| NAS1021A7 PRIMARY | Apcom Inc (USA) |
| NAS1021A7 PRIMARY | Republic Fastener Mfg. Corp. Dba Arconic Fastening Systems (USA) |
| Reference | Meaning |
|---|---|
| NAS1021A7 | 5/9 Secondary reference Harvard Industries Inc |
| JL2S720UN | 5/9 Secondary reference Sps Technologies, Llc Dba Cherry Aerospace Div Div Cherry Aerospace |
| NAS1021A7 | 5/9 Secondary reference U.S. Government activity |
| NAS1021A7 | 5/9 Secondary reference Klx Aerospace Solutions II SAS |
| NAS1021A7 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| NAS1021A7 | C/1 Advisory reference — outside the item-of-supply concept Boeing Distribution Services SAS |
| NAS1021A7 | 5/9 Secondary reference Lawrence Engineering and Supply Inc |
| NAS1021A7 | 3/2 Design control — primary reference U.S. Government activity |
| NAS1021A7 | 5/9 Secondary reference U.S. Government activity |
| NAS1021A7 | 5/9 Secondary reference F and C Sales Inc |
| NAS1021A7 | 5/9 Secondary reference Collins Engineering Corp |
NSN 5310-00-211-3432 is a Nut,self-Locking,hexagon, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-211-3432 has 10 manufacturer part numbers on file: NAS0121A7 (Satair A/s), NAS1021A7 (Howmet Global Fastening Systems Inc), NAS1021A7 (Hardware Specialty Co. Inc. Dba Hardware Specialty Co Inc), NAS1021A7 (Esna, Llc), NAS0121A7 (Plastic and Metal Products Corporation) and 5 more.
Key specifications for NAS1021A7: Lubrication: DRY FILM LUBRICANT OR SOLUBLE LUBRICANT; Width Across Flats: 0.679 INCHES MINIMUM AND 0.690 INCHES MAXIMUM IN; Bearing Surface Finish: 125.0 MICROINCHES; Surface Treatment Document and Classification: QQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 18 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.