The Screw,machine, cataloged under National Stock Number 5305-00-151-2526, 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17 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-151-2526 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Screw Surface Treatment | CADMIUM AND CHROMATE |
| Fastener Length | 1.375 INCHES MINIMUM AND 1.422 INCHES MAXIMUM IN |
| Screw Material Document and Classification | MIL-S-6758 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6050 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-6098 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 4TH MATERIAL RESPONSE |
| Thread Length | 0.791 INCHES MINIMUM AND 0.969 INCHES MAXIMUM IN |
| Hardness Rating | 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Screw Material | STEEL COMP 4130 OR STEEL COMP 8630 OR STEEL COMP 8735 OR STEEL COMP 8740 |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Thread Series Designator | UNF |
| Head Diameter | 0.919 INCHES MINIMUM AND 1.017 INCHES MAXIMUM IN |
| Screw Surface Treatment Document and Classification | QQ-P-416,TYPE 2,CLASS 3 FED SPEC ALL TREATMENT RESPONSES |
| 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 |
|---|---|
| AN509-816R21 | 5/9 Secondary reference U.S. Government activity |
| MS24694-S285 | 3/2 Design control — primary reference U.S. Government activity |
| NASM24694-S285 | 5/2 Secondary reference U.S. Government activity |
| NASM24694 | 5/9 Secondary reference U.S. Government activity |
| AN509-816R21 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-00-151-2526 is a Screw,machine, classified under FSC 5305, Screws. Status: active.
5 possible matches (shared part number, not a government interchangeability claim): 5305-00-900-3254, 5305-01-105-1135, 5305-01-475-8178. Verify interchangeability with system specifications before substitution.
Key specifications for 5305-00-151-2526: Screw Surface Treatment: CADMIUM AND CHROMATE; Fastener Length: 1.375 INCHES MINIMUM AND 1.422 INCHES MAXIMUM IN; Screw Material Document and Classification: MIL-S-6758 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6050 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-6098 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 4TH MATERIAL RESPONSE; Thread Length: 0.791 INCHES MINIMUM AND 0.969 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.