The Screw,externally Relieved Body, cataloged under National Stock Number 5305-00-078-3249, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corporation Div Rms. Government technical data includes 17 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 | 5305-00-078-3249 |
| Primary Part Number | 7238643P001 |
| Item Name | Screw,externally Relieved Body |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Lockheed Martin Corporation Div Rms |
| Status | ACTIVE |
| Head Height | 1.180 INCHES NOMINAL IN |
| Fastener Length | 0.880 INCHES MINIMUM IN |
| Thread Length | 0.665 INCHES MINIMUM IN |
| Material Document and Classification | QQ-S-763,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.500 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.625 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.215 INCHES NOMINAL IN |
| Externally Relieved Body Diameter Quantity | 1 |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 11 |
| Material | STEEL COMP 316 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.750 INCHES NOMINAL 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 |
|---|---|
| 7238643P001 PRIMARY | Lockheed Martin Corporation Div Rms (USA) |
NSN 5305-00-078-3249 is a Screw,externally Relieved Body, manufactured by Lockheed Martin Corporation Div Rms, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-078-3249 has 1 manufacturer part number on file: 7238643P001 (Lockheed Martin Corporation Div Rms).
Key specifications for 7238643P001: Head Height: 1.180 INCHES NOMINAL IN; Fastener Length: 0.880 INCHES MINIMUM IN; Thread Length: 0.665 INCHES MINIMUM IN; Material Document and Classification: QQ-S-763,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 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.