The Screw,externally Relieved Body, cataloged under National Stock Number 5305-00-920-9957, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 24 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-920-9957 |
| Item Name | Screw,externally Relieved Body |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Fourth Diameter From Head | 0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN |
| Head Height | 0.420 INCHES MINIMUM AND 0.450 INCHES MAXIMUM IN |
| Fastener Length | 3.076 INCHES MINIMUM AND 3.116 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-F-14072,FINISH E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.287 INCHES MINIMUM AND 0.327 INCHES MAXIMUM IN |
| Material Document and Classification | ASTM A582 ASSN STD ALL MATERIAL RESPONSES OVERALL |
| First Diameter From Head | 0.147 INCHES MINIMUM AND 0.149 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 0.137 INCHES MINIMUM AND 0.147 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Distance From Largest Bearing Surface of Head to End of Third Diameter | 2.635 INCHES MINIMUM AND 2.648 INCHES MAXIMUM IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 0.182 INCHES MINIMUM AND 0.192 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.070 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN |
| Externally Relieved Body Diameter Quantity | 4 |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 303 OR STEEL COMP 304 OVERALL |
| Distance From Largest Bearing Surface of Head to End of Fourth Diameter | 2.677 INCHES MINIMUM AND 2.683 INCHES MAXIMUM IN |
| Third Diameter From Head | 0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN |
| Thread Series Designator | UNF |
| Head Diameter | 0.182 INCHES MINIMUM AND 0.192 INCHES MAXIMUM 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 |
|---|---|
| 150850-002 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5305-00-920-9957 is a Screw,externally Relieved Body, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-00-920-9957: Fourth Diameter From Head: 0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN; Head Height: 0.420 INCHES MINIMUM AND 0.450 INCHES MAXIMUM IN; Fastener Length: 3.076 INCHES MINIMUM AND 3.116 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-F-14072,FINISH E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL. 24 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.