The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-236-1670, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Mcmaster-Carr Supply Co. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-236-1670 |
| Primary Part Number | 91309A724 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Head Height | 0.312 INCHES NOMINAL IN |
| Fastener Length | 2.940 INCHES MINIMUM AND 3.060 INCHES MAXIMUM IN |
| Thread Length | 2.786 INCHES MINIMUM AND 3.060 INCHES MAXIMUM IN |
| Material Document and Classification | SAE GRADE 2 ASSN STD ALL MATERIAL RESPONSES OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.750 INCHES NOMINAL IN |
| Surface Treatment | ZINC OR CADMIUM OVERALL |
| Minimum Tensile Strength | 74000 POUNDS PER SQUARE INCH LBS |
| Minimum Yield Strength | 24000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 13 |
| Material | STEEL OVERALL |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 91309A724 | Mcmaster-Carr Supply Co (USA) |
| Reference | Meaning |
|---|---|
| 8457666-1 | 7/2 Vendor item drawing reference Air Armament Center/ En |
| 1/2-13X3UNC-2A,ALL THREAD | 3/9 Design control — primary reference Spectrum Sciences & Software, Inc. |
| 1/2-13X3UNC-2A,ALL THREAD | 5/9 Secondary reference Ver-Val Enterprises Inc. Dba Vve |
NSN 5305-01-236-1670 is a Screw,cap,hexagon Head, manufactured by Mcmaster-Carr Supply Co, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-236-1670 has 1 manufacturer part number on file: 91309A724 (Mcmaster-Carr Supply Co).
Key specifications for 91309A724: Head Height: 0.312 INCHES NOMINAL IN; Fastener Length: 2.940 INCHES MINIMUM AND 3.060 INCHES MAXIMUM IN; Thread Length: 2.786 INCHES MINIMUM AND 3.060 INCHES MAXIMUM IN; Material Document and Classification: SAE GRADE 2 ASSN STD ALL MATERIAL RESPONSES OVERALL. 15 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.