The Nut,plain,hexagon, cataloged under National Stock Number 5310-00-400-3971, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Honeywell International Inc. Div Aerospace - Torrance. Government technical data includes 18 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 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-400-3971 |
| Primary Part Number | 801209-1 |
| Item Name | Nut,plain,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Honeywell International Inc. Div Aerospace - Torrance |
| Status | ACTIVE |
| Width Across Flats | 0.610 INCHES MINIMUM AND 0.630 INCHES MAXIMUM IN |
| Bearing Surface Finish | 125.0 MICROINCHES |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNS |
| Hole Configuration Style | CONFIGURATION B |
| Material Document and Classification | QQ-S-637 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Nut Height | 0.140 INCHES MINIMUM AND 0.155 INCHES MAXIMUM IN |
| Drilled Hole Diameter | 0.045 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL |
| Countersink Angle | 80.0 DEGREES MINIMUM AND 100.0 DEGREES MAXIMUM NUT |
| Nut Style | HEXAGON |
| Thread Class | 2B |
| Thread Quantity Per Inch | 40 |
| Material | STEEL COMP 1117 OVERALL |
| Bearing Surface Type | CHAMFERED |
| Hole Type and Quantity | 2 DRILLED |
| 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 |
|---|---|
| 801209-1 PRIMARY | Honeywell International Inc. Div Aerospace - Torrance (USA) |
NSN 5310-00-400-3971 is a Nut,plain,hexagon, manufactured by Honeywell International Inc. Div Aerospace - Torrance, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-400-3971 has 1 manufacturer part number on file: 801209-1 (Honeywell International Inc. Div Aerospace - Torrance).
2 possible matches (shared part number, not a government interchangeability claim): 5342-00-863-5251, 6110-01-245-7443. Verify interchangeability with system specifications before substitution.
Key specifications for 801209-1: Width Across Flats: 0.610 INCHES MINIMUM AND 0.630 INCHES MAXIMUM IN; Bearing Surface Finish: 125.0 MICROINCHES; Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNS. 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.