The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-01-099-0343, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Hi-Shear Corporation. Government technical data includes 19 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-099-0343 |
| Primary Part Number | N11-3 |
| Item Name | Nut,self-Locking,extended Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANT |
| Washer Outside Diameter | 0.330 INCHES MAXIMUM IN |
| Width Across Flats | 0.243 INCHES MINIMUM AND 0.251 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-T-10727 TY 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Temp Rating | 232.0 CELSIUS MAXIMUM DEGC |
| Hardness Rating | 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | AMS 6300 ASSN STD 1ST MATERIAL RESPONSE OR AMS 6322 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| Nut Counterbore Depth | 0.160 INCHES MINIMUM AND 0.170 INCHES MAXIMUM NUT IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.190 INCHES IN |
| Specification/standard Data | 26512-GN512JG MANUFACTURERS STANDARD |
| Counterbore Diameter | 0.231 INCHES MINIMUM AND 0.235 INCHES MAXIMUM NUT IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Surface Treatment | TIN OVERALL |
| Nut Style | HEXAGON |
| Thread Class | 2B |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 4037 AND STEEL COMP 8740 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 |
|---|---|
| N11-3 PRIMARY | Hi-Shear Corporation (USA) |
| 78456-1032 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| N11-3 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| H50437-3 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| H50437-3 | Boeing Distribution Services SAS (FRA) |
| Reference | Meaning |
|---|---|
| H50437-3 | 5/9 Secondary reference Klx Aerospace Solutions II SAS |
| GN512JG3 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation |
NSN 5310-01-099-0343 is a Nut,self-Locking,extended Washer, manufactured by Hi-Shear Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-099-0343 has 5 manufacturer part numbers on file: N11-3 (Hi-Shear Corporation), 78456-1032 (Sps Technologies, Llc Dba PB Fasteners), N11-3 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), H50437-3 (Howmet Global Fastening Systems Inc), H50437-3 (Boeing Distribution Services SAS).
2 possible matches (shared part number, not a government interchangeability claim): 6515-01-153-5870, 5325-01-393-8152. Verify interchangeability with system specifications before substitution.
Key specifications for N11-3: Lubrication: DRY FILM LUBRICANT; Overall Height: 0.305 INCHES MAXIMUM IN; Washer Outside Diameter: 0.330 INCHES MAXIMUM IN; Width Across Flats: 0.243 INCHES MINIMUM AND 0.251 INCHES MAXIMUM IN. 19 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.