The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-00-010-8450, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-010-8450 |
| Primary Part Number | H34-3 |
| Item Name | Nut,self-Locking,extended Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Washer Outside Diameter | 0.345 INCHES MAXIMUM IN |
| Width Across Flats | 0.243 INCHES MINIMUM AND 0.251 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 | 1200.0 FAHRENHEIT NOMINAL DEGF |
| Washer Thickness | 0.047 INCHES MINIMUM AND 0.057 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5735 ASSN STD 1ST MATERIAL RESPONSE OR 5737 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.190 INCHES IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Surface Treatment | SILVER OVERALL |
| Precious Material and Location | EXTERNAL SURFACE SILVER |
| Nut Style | DOUBLE HEXAGON |
| Thread Class | 3BG |
| Thread Quantity Per Inch | 32 |
| 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 |
|---|---|
| H34-3 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| BH00210-3 | Bristol Industries, Llc (USA) |
| Reference | Meaning |
|---|---|
| LH9114-3K | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc. Div Microdot Products |
| 525-618-9002 | 7/2 Vendor item drawing reference U.S. Government activity |
| LH9114-3K | 5/9 Secondary reference Harvard Industries Inc |
| VN448802 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-00-010-8450 is a Nut,self-Locking,extended Washer, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-010-8450 has 2 manufacturer part numbers on file: H34-3 (Howmet Global Fastening Systems Inc), BH00210-3 (Bristol Industries, Llc).
1 possible match (shared part number, not a government interchangeability claim): 5330-01-310-0772. Verify interchangeability with system specifications before substitution.
Key specifications for H34-3: Overall Height: 0.240 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN; Washer Outside Diameter: 0.345 INCHES MAXIMUM IN; Width Across Flats: 0.243 INCHES MINIMUM AND 0.251 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.