The Screw,externally Relieved Body, cataloged under National Stock Number 5305-01-277-2564, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company. Government technical data includes 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-277-2564 |
| Primary Part Number | 7-317236846 |
| Item Name | Screw,externally Relieved Body |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company |
| Status | ACTIVE |
| Width Across Flats | 0.125 INCHES NOMINAL IN |
| Head Height | 0.167 INCHES NOMINAL IN |
| Fastener Length | 1.028 INCHES NOMINAL IN |
| Thread Length | 0.216 INCHES NOMINAL IN |
| Head Style | HEXAGON COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.155 INCHES NOMINAL IN |
| Externally Relieved Body Diameter Quantity | 4 |
| Internal Drive Style | HEXAGON |
| Countersink Angle | 120.0 DEGREES NOMINAL |
| Material | STEEL COMP 4340 OVERALL |
| Thread Series Designator | UNF |
| 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 |
|---|---|
| 7-317236846 PRIMARY | The Boeing Company (USA) |
| 7-317236846 PRIMARY | Alziebler Incorporated (USA) |
| Reference | Meaning |
|---|---|
| 7-317236846 | 5/9 Secondary reference Mcdonnell Douglas Helicopter Co Inc |
NSN 5305-01-277-2564 is a Screw,externally Relieved Body, manufactured by The Boeing Company, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-277-2564 has 2 manufacturer part numbers on file: 7-317236846 (The Boeing Company), 7-317236846 (Alziebler Incorporated).
Key specifications for 7-317236846: Width Across Flats: 0.125 INCHES NOMINAL IN; Head Height: 0.167 INCHES NOMINAL IN; Fastener Length: 1.028 INCHES NOMINAL IN; Thread Length: 0.216 INCHES NOMINAL IN. 12 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.