The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-028-4829, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Long-Lok, Llc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-028-4829 |
| Primary Part Number | LP57M40S14 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Long-Lok, Llc |
| Status | ACTIVE |
| Head Height | 0.061 INCHES MINIMUM AND 0.068 INCHES MAXIMUM IN |
| Fastener Length | 0.813 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN |
| Thread Length | 0.763 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.112 INCHES IN |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 40 |
| Material | STEEL COMP 304 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.223 INCHES MINIMUM AND 0.235 INCHES MAXIMUM IN |
| 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 |
|---|---|
| LP57M40S14 PRIMARY | Long-Lok, Llc (USA) |
| Reference | Meaning |
|---|---|
| 6091-0414 | 5/9 Secondary reference Kidde-Fenwal, Llc |
NSN 5305-01-028-4829 is a Screw,cap,socket Head, manufactured by Long-Lok, Llc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-028-4829 has 1 manufacturer part number on file: LP57M40S14 (Long-Lok, Llc).
Key specifications for LP57M40S14: Head Height: 0.061 INCHES MINIMUM AND 0.068 INCHES MAXIMUM IN; Fastener Length: 0.813 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN; Thread Length: 0.763 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN; Material Document and Classification: QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 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.