The Nut,self-Locking,round, cataloged under National Stock Number 5310-01-135-1657, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Pcx Aerosystems Enfield, Llc Dba Pcx Aerosystems Enfield Llc. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-135-1657 |
| Primary Part Number | 65391-11625-101 |
| Item Name | Nut,self-Locking,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Pcx Aerosystems Enfield, Llc Dba Pcx Aerosystems Enfield Llc |
| Status | ACTIVE |
| Width Across Flats | 5.437 INCHES NOMINAL IN |
| Thread Series | UNJS |
| Material Document and Classification | MIL-S-5000 COMP 4340 COND C MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 5.437 INCHES IN |
| Nut Diameter | 6.700 INCHES NOMINAL IN |
| Nut Thickness | 0.748 INCHES NOMINAL IN |
| Nut Style | ROUND |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 12 |
| Material | STEEL COMP 4340 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 |
|---|---|
| 65391-11625-101 | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| 65391-11625-101 PRIMARY | Pcx Aerosystems Enfield, Llc Dba Pcx Aerosystems Enfield Llc (USA) |
NSN 5310-01-135-1657 is a Nut,self-Locking,round, manufactured by Pcx Aerosystems Enfield, Llc Dba Pcx Aerosystems Enfield Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-135-1657 has 2 manufacturer part numbers on file: 65391-11625-101 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp), 65391-11625-101 (Pcx Aerosystems Enfield, Llc Dba Pcx Aerosystems Enfield Llc).
Key specifications for 65391-11625-101: Width Across Flats: 5.437 INCHES NOMINAL IN; Thread Series: UNJS; Material Document and Classification: MIL-S-5000 COMP 4340 COND C MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Thread Direction: RIGHT-HAND. 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.