The Nut,self-Locking,clinch, cataloged under National Stock Number 5310-00-730-9558, 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 17 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-730-9558 |
| Primary Part Number | LKS-440-1EF |
| Item Name | Nut,self-Locking,clinch |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Penn Engineering & Manufacturing Corp |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANT |
| Width Across Flats | 0.250 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Temp Rating | 450.0 FAHRENHEIT NOMINAL DEGF |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.112 INCHES IN |
| Pilot Diameter | 0.185 INCHES MAXIMUM IN |
| Pilot Length | 0.038 INCHES MAXIMUM IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Nut Height | 0.173 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL |
| Nut Style | CLINCH |
| Thread Class | 3B |
| Thread Quantity Per Inch | 40 |
| 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-440-1EF PRIMARY | Penn Engineering & Manufacturing Corp (USA) |
| 990289-3 | L3harris Technologies, Inc. Dba Harris Corp Div Antenna Products (USA) |
| GN512BH04S1 | Northrop Grumman Systems Corporation (USA) |
| 5800332-9002-038 | Hensoldt Sensors Gmbh (DEU) |
| Reference | Meaning |
|---|---|
| 210546-004 | 5/2 Secondary reference U.S. Government activity |
| 04MN009-6 | 7/2 Vendor item drawing reference Raytheon Co ESD Long Island Div |
| LKS440-1 | 5/9 Secondary reference Penn Engineering & Manufacturing Corp |
| 10163825 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 247AS-C0402-005 | 7/2 Vendor item drawing reference Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| 003241-05 | 5/9 Secondary reference Emerson Power Transmission Corporation Div Ept |
| 5310PL0145321 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 134348-001 | 5/9 Secondary reference U.S. Government activity |
| 104842-1 | C/1 Advisory reference — outside the item-of-supply concept L3harris Technologies, Inc. Dba Harris Corp Div Antenna Products |
NSN 5310-00-730-9558 is a Nut,self-Locking,clinch, manufactured by Penn Engineering & Manufacturing Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-730-9558 has 4 manufacturer part numbers on file: LKS-440-1EF (Penn Engineering & Manufacturing Corp), 990289-3 (L3harris Technologies, Inc. Dba Harris Corp Div Antenna Products), GN512BH04S1 (Northrop Grumman Systems Corporation), 5800332-9002-038 (Hensoldt Sensors Gmbh).
1 possible match (shared part number, not a government interchangeability claim): 5998-01-062-9637. Verify interchangeability with system specifications before substitution.
Key specifications for LKS-440-1EF: Lubrication: DRY FILM LUBRICANT; Width Across Flats: 0.250 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNIFIED NATIONAL COARSE (UNC). 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.