The Screw,externally Relieved Body, cataloged under National Stock Number 5305-01-478-9928, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-478-9928 |
| Item Name | Screw,externally Relieved Body |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.100 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN |
| Fastener Length | 0.797 INCHES MINIMUM AND 0.907 INCHES MAXIMUM IN |
| Thread Length | 0.250 INCHES NOMINAL IN |
| Material Document and Classification | ASTM-A-581 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM-A-582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.119 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.164 INCHES IN |
| Head Style | OVAL COUNTERSUNK UNDERCUT |
| Thread Direction | RIGHT-HAND |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.453 INCHES NOMINAL IN |
| Externally Relieved Body Diameter Quantity | 1 |
| Internal Drive Style | SLOT |
| Countersink Angle | 81.0 DEGREES MINIMUM AND 83.0 DEGREES MAXIMUM |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.312 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 |
| Reference | Meaning |
|---|---|
| 555660 | 3/9 Design control — primary reference Matthew Warren, Inc Dba Raf Electronic Hardware Div Raf Electronic Hardware, Llc |
| 931SS0 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5305-01-478-9928 is a Screw,externally Relieved Body, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-478-9928: Head Height: 0.100 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN; Fastener Length: 0.797 INCHES MINIMUM AND 0.907 INCHES MAXIMUM IN; Thread Length: 0.250 INCHES NOMINAL IN; Material Document and Classification: ASTM-A-581 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM-A-582 ASSN STD 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.