The Nut,self-Locking,clinch, cataloged under National Stock Number 5310-00-882-7935, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Penn Engineering & Manufacturing Corp. Government technical data includes 13 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-882-7935 |
| Primary Part Number | LKS-256-1EF |
| Item Name | Nut,self-Locking,clinch |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Penn Engineering & Manufacturing Corp |
| Status | ACTIVE |
| Width Across Flats | 0.218 INCHES NOMINAL IN |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Material Document and Classification | AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.086 INCHES IN |
| Pilot Diameter | 0.165 INCHES NOMINAL IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Nut Height | 0.173 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Nut Style | CLINCH |
| Thread Class | 3B |
| Thread Quantity Per Inch | 56 |
| Material | STEEL COMP 303 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 |
|---|---|
| LKS-256-1EF PRIMARY | Penn Engineering & Manufacturing Corp (USA) |
| Reference | Meaning |
|---|---|
| 04MN009-10 | 7/2 Vendor item drawing reference Raytheon Co ESD Long Island Div |
| 2-300-294-01 | 5/2 Secondary reference U.S. Government activity |
| 413268-1 | 5/2 Secondary reference U.S. Government activity |
| LKS256-1 | 5/9 Secondary reference Penn Engineering & Manufacturing Corp |
NSN 5310-00-882-7935 is a Nut,self-Locking,clinch, manufactured by Penn Engineering & Manufacturing Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-882-7935 has 1 manufacturer part number on file: LKS-256-1EF (Penn Engineering & Manufacturing Corp).
1 possible match (shared part number, not a government interchangeability claim): 5340-01-623-4377. Verify interchangeability with system specifications before substitution.
Key specifications for LKS-256-1EF: Width Across Flats: 0.218 INCHES NOMINAL IN; Thread Series: UNIFIED NATIONAL COARSE (UNC); Material Document and Classification: AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Thread Direction: RIGHT-HAND. 13 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.