The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-01-259-6355, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Niagara Plastics L.l.c.. Government technical data includes 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-259-6355 |
| Primary Part Number | LH3 |
| Item Name | Nut,self-Locking,extended Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Niagara Plastics L.l.c. |
| Status | ACTIVE |
| Washer Outside Diameter | 0.395 INCHES NOMINAL IN |
| Width Across Flats | 0.343 INCHES NOMINAL IN |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Material Document and Classification | L-P-410 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.164 INCHES IN |
| Locking Feature | PREVAILING TORQUE ALL NONMETALLIC DESIGN |
| Nut Style | HEXAGON |
| Thread Class | 2B |
| Thread Quantity Per Inch | 32 |
| Material | PLASTIC POLYHEXAMETHYLENE ADIPAMIDE OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5310-01-259-6355 is a Nut,self-Locking,extended Washer, manufactured by Niagara Plastics L.l.c., classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-259-6355 has 2 manufacturer part numbers on file: LH3 (Niagara Plastics L.l.c.), LH3 (Craftech Industries, Inc. Dba Craftech Industries Inc).
1 possible match (shared part number, not a government interchangeability claim): 6625-01-497-7918. Verify interchangeability with system specifications before substitution.
Key specifications for LH3: Overall Height: 0.205 INCHES NOMINAL IN; Washer Outside Diameter: 0.395 INCHES NOMINAL IN; Width Across Flats: 0.343 INCHES NOMINAL IN; Thread Series: UNIFIED NATIONAL COARSE (UNC). 11 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.