The Nut,plain,extended Washer,double, cataloged under National Stock Number 5310-00-110-1550, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Esna, Llc. Government technical data includes 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-110-1550 |
| Primary Part Number | RMLH3830-054 |
| Item Name | Nut,plain,extended Washer,double |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Esna, Llc |
| Status | ACTIVE |
| Washer Outside Diameter | 0.500 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN |
| Width Across Flats | 0.369 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Temp Rating | 450.0 FAHRENHEIT NOMINAL DEGF |
| Washer Thickness | 0.058 INCHES MINIMUM AND 0.068 INCHES MAXIMUM IN |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.312 INCHES IN |
| Surface Treatment | CADMIUM OVERALL |
| Nut Style | DOUBLE HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 24 |
| Material | 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 |
|---|---|
| RMLH3830-054 | Safran Transmission Systems (FRA) |
| RMLH3830-054 PRIMARY | Esna, Llc (USA) |
| Reference | Meaning |
|---|---|
| RMLH3830-054 | 5/9 Secondary reference Harvard Industries Inc |
NSN 5310-00-110-1550 is a Nut,plain,extended Washer,double, manufactured by Esna, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-110-1550 has 2 manufacturer part numbers on file: RMLH3830-054 (Safran Transmission Systems), RMLH3830-054 (Esna, Llc).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-377-7928. Verify interchangeability with system specifications before substitution.
Key specifications for RMLH3830-054: Overall Height: 0.350 INCHES MINIMUM AND 0.360 INCHES MAXIMUM IN; Washer Outside Diameter: 0.500 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN; Width Across Flats: 0.369 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 14 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.