The Nut,plain,slotted,hexagon, cataloged under National Stock Number 5310-00-176-8108, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Aviation Spares and Repairs Ltd. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 7 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 5310-00-176-8108 |
| Primary Part Number | AN320-4 |
| Item Name | Nut,plain,slotted,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Aviation Spares and Repairs Ltd |
| Status | CANCELLED |
| Width Across Flats | 0.428 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNF |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Nut Height | 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Nut Style | SLOTTED, HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 28 |
| Material | STEEL OVERALL |
| Bearing Surface Type | CHAMFERED OR WASHER FACED |
| Acquisition Status | CANCELLED |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| AN320-4 | Aviation Spares and Repairs Ltd (GBR) |
| 1276-18-480 | Leonardo S.p.a. - Electronics Division - Defence Business Area (ITA) |
| AN320-4 | Leonardo Spa Aeronautics Division - Pomigliano D'arco Site (ITA) |
| 175S1 | Honeywell International Inc Div Aerospace-South Bend (bendix Dr) (USA) |
| 404 393 | Piper Industrial Manufacturing Company, Llc Div Piper Industrial Manufacturing Company (USA) |
| 2210293 | Embraer S.a. (BRA) |
| NASM320-4 | All-System Aerospace International, Inc. (USA) |
| Reference | Meaning |
|---|---|
| AN320-4 | 5/9 Secondary reference U.S. Government activity |
| 5310001768108 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| AN320-4 | 3/2 Design control — primary reference U.S. Government activity |
| 5310PL0138366 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 2210293 | 5/9 Secondary reference Embraer Empresa Brasileira De Aeronautica Sa |
| 807115-00 | 5/9 Secondary reference Defense Reduction Agency |
NSN 5310-00-176-8108 is a Nut,plain,slotted,hexagon, manufactured by Aviation Spares and Repairs Ltd, classified under FSC 5310, Nuts and Washers. Status: cancelled.
NSN 5310-00-176-8108 has 7 manufacturer part numbers on file: AN320-4 (Aviation Spares and Repairs Ltd), 1276-18-480 (Leonardo S.p.a. - Electronics Division - Defence Business Area), AN320-4 (Leonardo Spa Aeronautics Division - Pomigliano D'arco Site), 175S1 (Honeywell International Inc Div Aerospace-South Bend (bendix Dr)), 404 393 (Piper Industrial Manufacturing Company, Llc Div Piper Industrial Manufacturing Company) and 2 more.
1 possible match (shared part number, not a government interchangeability claim): 5310-01-223-6672. Verify interchangeability with system specifications before substitution.
Key specifications for AN320-4: Width Across Flats: 0.428 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNF; 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.
NSN 5310-00-176-8108 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.
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.