The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-01-206-7288, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Howmet Fixations Simmonds SAS. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 14 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-206-7288 |
| Primary Part Number | BACN10HR7C |
| Item Name | Nut,self-Locking,extended Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Howmet Fixations Simmonds SAS |
| Status | ACTIVE |
| Washer Outside Diameter | 0.750 INCHES MAXIMUM IN |
| Width Across Flats | 0.553 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Precious Material | SILVER |
| Temp Rating | 900.0 FAHRENHEIT MAXIMUM DEGF |
| Washer Thickness | 0.075 INCHES MINIMUM IN |
| Material Document and Classification | AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.438 INCHES IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Surface Treatment | SILVER OVERALL |
| Precious Material and Location | OVERALL SILVER |
| Nut Style | DOUBLE HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 20 |
| Material | IRON ALLOY 660 OVERALL |
| 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 |
|---|---|
| BACN10HR7C | Howmet Fixations Simmonds SAS (FRA) |
| BACN10HR7C | Howmet Global Fastening Systems Inc (USA) |
| BACN10HR7C | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BACN10HR7C | Esna, Llc (USA) |
| BACN10HR7C | Bristol Industries, Llc (USA) |
| Reference | Meaning |
|---|---|
| BACN10HR7C | 3/2 Design control — primary reference U.S. Government activity |
| 101LH9031-7 | 5/9 Secondary reference Harvard Industries Inc |
| GH00304-7C | 5/9 Secondary reference Bristol Industries, Llc |
| BMN5024C-7 | 5/9 Secondary reference Warner and Swasey Co Lima Plant Div Sub of Cross and Trecker Corp |
| BACN10HR7C | 5/9 Secondary reference U.S. Government activity |
| H97-7 | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| BACN10HR7C | 5/9 Secondary reference Alcoa Global Fasteners, Inc Dba Simmonds Mecaero Fas Pdts Div Simmonds Mecaero Fas Pdts |
| BACN10HR7C | 5/9 Secondary reference Sps Technologies, Llc Dba Cherry Aerospace Div Div Cherry Aerospace |
| 67832A7 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| 67867832A-720 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| 101LH9031-7 | 5/9 Secondary reference Esna, Llc |
| BACN10HR7C | 5/9 Secondary reference Huck International, Inc |
| BACN10HR7C | 5/9 Secondary reference Valley-Todeco, Inc. Dba Arconic Fastening Systems |
| BMN5024C7 | 5/9 Secondary reference U.S. Government activity |
NSN 5310-01-206-7288 is a Nut,self-Locking,extended Washer, manufactured by Howmet Fixations Simmonds SAS, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-206-7288 has 5 manufacturer part numbers on file: BACN10HR7C (Howmet Fixations Simmonds SAS), BACN10HR7C (Howmet Global Fastening Systems Inc), BACN10HR7C (Sps Technologies, Llc Dba PB Fasteners), BACN10HR7C (Esna, Llc), BACN10HR7C (Bristol Industries, Llc).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-669-5379. Verify interchangeability with system specifications before substitution.
Key specifications for BACN10HR7C: Overall Height: 0.520 INCHES MAXIMUM IN; Washer Outside Diameter: 0.750 INCHES MAXIMUM IN; Width Across Flats: 0.553 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN; Surface Treatment Document and Classification: AMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OVERALL. 17 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.