The Screw,externally Relieved Body, cataloged under National Stock Number 5305-01-124-1216, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 25 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-124-1216 |
| Item Name | Screw,externally Relieved Body |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Fourth Diameter From Head | 0.124 INCHES MINIMUM AND 0.132 INCHES MAXIMUM IN |
| Head Height | 0.165 INCHES NOMINAL IN |
| Fastener Length | 0.980 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.399 INCHES NOMINAL IN |
| Material Document and Classification | ASTM 479,GR UNS 21800 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.160 INCHES MINIMUM AND 0.166 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 0.494 INCHES MINIMUM AND 0.507 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.164 INCHES IN |
| Distance From Largest Bearing Surface of Head to End of Third Diameter | 0.524 INCHES MINIMUM AND 0.537 INCHES MAXIMUM IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 0.127 INCHES MINIMUM AND 0.129 INCHES MAXIMUM IN |
| Width Between Flats | 0.312 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.465 INCHES MINIMUM AND 0.475 INCHES MAXIMUM IN |
| Externally Relieved Body Diameter Quantity | 4 |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | W/O INTERNAL DRIVE |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Distance From Largest Bearing Surface of Head to End of Fourth Diameter | 0.574 INCHES MINIMUM AND 0.587 INCHES MAXIMUM IN |
| Third Diameter From Head | 0.160 INCHES MINIMUM AND 0.166 INCHES MAXIMUM IN |
| 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 |
| Reference | Meaning |
|---|---|
| 3516721 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-124-1216 is a Screw,externally Relieved Body, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-124-1216: Fourth Diameter From Head: 0.124 INCHES MINIMUM AND 0.132 INCHES MAXIMUM IN; Head Height: 0.165 INCHES NOMINAL IN; Fastener Length: 0.980 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 25 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.