The Screw,externally Relieved Body, cataloged under National Stock Number 5305-00-649-6993, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Raytheon Company Div Corp. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-649-6993 |
| Primary Part Number | 2791-1029 |
| Item Name | Screw,externally Relieved Body |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Raytheon Company Div Corp |
| Status | ACTIVE |
| Head Height | 0.163 INCHES NOMINAL IN |
| Fastener Length | 2.500 INCHES NOMINAL IN |
| Thread Length | 0.875 INCHES MINIMUM IN |
| First Diameter From Head | 0.189 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.438 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.125 INCHES NOMINAL IN |
| Externally Relieved Body Diameter Quantity | 1 |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5305-00-649-6993 is a Screw,externally Relieved Body, manufactured by Raytheon Company Div Corp, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-649-6993 has 2 manufacturer part numbers on file: 2791-1029 (Raytheon Company Div Corp), 9084751 (Us Army Aviation and Missile Command).
Key specifications for 2791-1029: Head Height: 0.163 INCHES NOMINAL IN; Fastener Length: 2.500 INCHES NOMINAL IN; Thread Length: 0.875 INCHES MINIMUM IN; First Diameter From Head: 0.189 INCHES NOMINAL IN. 16 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.