The Screw,cap,socket Head, cataloged under National Stock Number 5305-00-031-0501, 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 14 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-031-0501 |
| Primary Part Number | LL54N04S8 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Long-Lok, Llc |
| Status | ACTIVE |
| Head Height | 0.118 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN |
| Fastener Length | 0.469 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Thread Length | 0.386 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FILLISTER |
| Thread Direction | RIGHT-HAND |
| Nondefinitive Spec/std Data | 1 TYPE AND 4S STYLE |
| Locking Feature | STRIP THREADS |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.292 INCHES MINIMUM AND 0.313 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 |
|---|---|
| LL54N04S8 PRIMARY | Long-Lok, Llc (USA) |
| Reference | Meaning |
|---|---|
| 655-502-9004 | 5/2 Secondary reference U.S. Government activity |
| 307-7270365ITEM | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
| FFS92 | 4/1 Identification reference U.S. Government activity |
| LL5N04S8 | 5/9 Secondary reference Long-Lok, Llc |
NSN 5305-00-031-0501 is a Screw,cap,socket Head, manufactured by Long-Lok, Llc, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-031-0501 has 1 manufacturer part number on file: LL54N04S8 (Long-Lok, Llc).
Key specifications for LL54N04S8: Head Height: 0.118 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN; Fastener Length: 0.469 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN; Thread Length: 0.386 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN; Nominal Thread Diameter: 0.190 INCHES IN. 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.