The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-01-073-2942, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Alcoa Global Fasteners, Inc Dba Simmonds Mecaero Fas Pdts Div Simmonds Mecaero Fas Pdts. Government technical data includes 15 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-073-2942 |
| Primary Part Number | THCR-354 |
| Item Name | Nut,self-Locking,extended Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Alcoa Global Fasteners, Inc Dba Simmonds Mecaero Fas Pdts Div Simmonds Mecaero Fas Pdts |
| Status | ACTIVE |
| Lubrication | SOLUBLE LUBRICANT |
| Washer Outside Diameter | 0.420 INCHES MAXIMUM IN |
| Width Across Flats | 0.305 INCHES MINIMUM AND 0.315 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | Q-P-416,TY 2,CL 2 ASSN STD 13TH TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Temp Rating | 450.0 FAHRENHEIT MAXIMUM DEGF |
| Washer Thickness | 0.020 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Nut Style | SLOTTED HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 28 |
| Material | STEEL 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 |
|---|---|
| THCR-354 | Alcoa Global Fasteners, Inc Dba Simmonds Mecaero Fas Pdts Div Simmonds Mecaero Fas Pdts (USA) |
| Reference | Meaning |
|---|---|
| 10456191 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| TE9868-4 | 5/9 Secondary reference Harvard Industries Inc |
| MS14145-4 | 5/9 Secondary reference U.S. Government activity |
| MS14145-4 | 3/2 Design control — primary reference U.S. Government activity |
| E12589-4 | C/1 Advisory reference — outside the item-of-supply concept Harvard Industries Inc |
NSN 5310-01-073-2942 is a Nut,self-Locking,extended Washer, manufactured by Alcoa Global Fasteners, Inc Dba Simmonds Mecaero Fas Pdts Div Simmonds Mecaero Fas Pdts, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-073-2942 has 1 manufacturer part number on file: THCR-354 (Alcoa Global Fasteners, Inc Dba Simmonds Mecaero Fas Pdts Div Simmonds Mecaero Fas Pdts).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-116-1207. Verify interchangeability with system specifications before substitution.
Key specifications for THCR-354: Lubrication: SOLUBLE LUBRICANT; Overall Height: 0.173 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN; Washer Outside Diameter: 0.420 INCHES MAXIMUM IN; Width Across Flats: 0.305 INCHES MINIMUM AND 0.315 INCHES MAXIMUM IN. 15 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.