The Screw,tapping, cataloged under National Stock Number 5305-01-157-6794, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-157-6794 |
| Item Name | Screw,tapping |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Nonmachine Nominal Thread Diameter | 0.250 INCHES IN |
| Head Height | 0.092 INCHES MINIMUM AND 0.107 INCHES MAXIMUM IN |
| Fastener Length | 0.500 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Nonmachine Thread Style | THRU SLOT (TYPE D) |
| Material Document and Classification | 66 FED STD ALL MATERIAL RESPONSES OVERALL |
| Head Style | FLAT COUNTERSUNK UNDERCUT |
| Nondefinitive Spec/std Data | D TYPE OR F TYPE OR G TYPE OR T TYPE |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Countersink Angle | 80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM |
| Material | STEEL OVERALL |
| Head Diameter | 0.452 INCHES MINIMUM AND 0.507 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 |
|---|---|
| FF-S-107 | 4/1 Identification reference U.S. Government activity |
| MS24627-62 | 3/2 Design control — primary reference U.S. Government activity |
| MS24627-62 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-157-6794 is a Screw,tapping, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-157-6794: Nonmachine Nominal Thread Diameter: 0.250 INCHES IN; Head Height: 0.092 INCHES MINIMUM AND 0.107 INCHES MAXIMUM IN; Fastener Length: 0.500 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 13 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.