The Screw,tapping, cataloged under National Stock Number 5305-01-078-5072, 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17 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-078-5072 |
| Item Name | Screw,tapping |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Nonmachine Nominal Thread Diameter | 0.375 INCHES IN |
| Extended Washer Thickness | 0.037 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN |
| Head Height | 0.307 INCHES MINIMUM AND 0.358 INCHES MAXIMUM IN |
| Fastener Length | 0.950 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416 TY 2 CL2 FED SPEC SINGLE TREATMENT RESPONSE OR MIL-C-81562 TY 2 CL 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 0.720 INCHES MINIMUM AND 0.780 INCHES MAXIMUM IN |
| Hardness Rating | 32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL |
| Nonmachine Thread Style | BLUNT (TYPE TT) |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Features Provided | CASEHARDENED |
| Head Style | HEXAGON EXTENDED WASHER |
| Width Between Flats | 0.551 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN |
| Nondefinitive Spec/std Data | B TYPE |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Minimum Tensile Strength | 150000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | W/O INTERNAL DRIVE |
| Material | STEEL COMP 4037 OVERALL |
| 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 |
|---|---|
| 4701271-4 | C/1 Advisory reference — outside the item-of-supply concept C Systems Llc Dba Craig Systems Dba Eastern Technologies |
| FF-S-107 | 4/1 Identification reference U.S. Government activity |
| MS51871-15 | 2/2 Government specification standardization U.S. Government activity |
NSN 5305-01-078-5072 is a Screw,tapping, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-078-5072: Nonmachine Nominal Thread Diameter: 0.375 INCHES IN; Extended Washer Thickness: 0.037 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN; Head Height: 0.307 INCHES MINIMUM AND 0.358 INCHES MAXIMUM IN; Fastener Length: 0.950 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN. 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.