The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-043-0553, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corporation Div Rotary and Mission Systems. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-043-0553 |
| Primary Part Number | 6379337-1 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Lockheed Martin Corporation Div Rotary and Mission Systems |
| Status | ACTIVE |
| Head Height | 0.180 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN |
| Fastener Length | 1.430 INCHES MINIMUM AND 1.450 INCHES MAXIMUM IN |
| Thread Length | 0.470 INCHES MINIMUM AND 0.490 INCHES MAXIMUM IN |
| Shank Unthreaded Hole Diameter | 0.062 INCHES MINIMUM AND 0.065 INCHES MAXIMUM FIRST HOLE IN |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 302 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 0.870 INCHES MINIMUM AND 0.890 INCHES MAXIMUM FIRST HOLE 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 |
|---|---|
| 6379337-1 PRIMARY | Lockheed Martin Corporation Div Rotary and Mission Systems (USA) |
NSN 5305-01-043-0553 is a Screw,cap,hexagon Head, manufactured by Lockheed Martin Corporation Div Rotary and Mission Systems, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-043-0553 has 1 manufacturer part number on file: 6379337-1 (Lockheed Martin Corporation Div Rotary and Mission Systems).
Key specifications for 6379337-1: Head Height: 0.180 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN; Fastener Length: 1.430 INCHES MINIMUM AND 1.450 INCHES MAXIMUM IN; Thread Length: 0.470 INCHES MINIMUM AND 0.490 INCHES MAXIMUM IN; Shank Unthreaded Hole Diameter: 0.062 INCHES MINIMUM AND 0.065 INCHES MAXIMUM FIRST HOLE 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.