The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-256-5199, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corp Div Space. Government technical data includes 19 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-256-5199 |
| Primary Part Number | 47B530980P4 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Lockheed Martin Corp Div Space |
| Status | ACTIVE |
| Width Across Flats | 0.109 INCHES MINIMUM AND 0.111 INCHES MAXIMUM IN |
| Head Height | 0.134 INCHES MINIMUM AND 0.138 INCHES MAXIMUM IN |
| Fastener Length | 0.604 INCHES MINIMUM AND 0.609 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-STD-865 MIL STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.542 INCHES MINIMUM AND 0.609 INCHES MAXIMUM IN |
| Supplementary Features | ITEM HAS OTHER CRITICAL FEATURES SUCH AS TOLERANCE, FIT RESTRICTIONS OR APPLICATION AS WELL AS BEING NUCLEAR HARD |
| Criticality Code Justification | SUPP |
| Nominal Thread Diameter | 0.138 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | CADMIUM OVERALL |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Nuclear Hardness Critical Feature | HARDENED |
| Head Diameter | 0.218 INCHES MINIMUM AND 0.226 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | M |
| Part Number | Manufacturer |
|---|---|
| 47B530980P4 PRIMARY | Lockheed Martin Corp Div Space (USA) |
| Reference | Meaning |
|---|---|
| 47B530980P4 | 5/9 Secondary reference Lockheed Martin Corporation Dba Lockheed Martin Aerostructures |
NSN 5305-01-256-5199 is a Screw,cap,socket Head, manufactured by Lockheed Martin Corp Div Space, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-256-5199 has 1 manufacturer part number on file: 47B530980P4 (Lockheed Martin Corp Div Space).
Key specifications for 47B530980P4: Width Across Flats: 0.109 INCHES MINIMUM AND 0.111 INCHES MAXIMUM IN; Head Height: 0.134 INCHES MINIMUM AND 0.138 INCHES MAXIMUM IN; Fastener Length: 0.604 INCHES MINIMUM AND 0.609 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-STD-865 MIL STD SINGLE TREATMENT RESPONSE OVERALL. 19 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.
NSN 5305-01-256-5199 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.