The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-309-7039, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 16 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through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-309-7039 |
| Primary Part Number | 74A731255-2001 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Width Across Flats | 0.378 INCHES MINIMUM AND 0.383 INCHES MAXIMUM IN |
| Head Height | 0.750 INCHES NOMINAL IN |
| Fastener Length | 6.340 INCHES NOMINAL IN |
| Thread Length | 1.170 INCHES NOMINAL IN |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE FASTENER |
| Nominal Thread Diameter | 0.750 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Locking Feature | PATCH THREADS |
| Internal Drive Style | SQUARE |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 16 |
| Material | PLASTIC POLYAMIDE NYLON LOCKING FEATURE |
| Material | STEEL COMP XM-13 FASTENER |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 1.250 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| 74A731255-2001 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 74A731255-2001 | 5/9 Secondary reference Huck International, Inc |
| 74A731255-2001 | 3/9 Design control — primary reference U.S. Government activity |
| 74A731255-2001 | 5/9 Secondary reference U.S. Government activity |
| 74A731255-2001 | 5/9 Secondary reference Valley-Todeco, Inc. Dba Arconic Fastening Systems |
| 741731255-2001 | 5/9 Secondary reference U.S. Government activity |
| 74A731255-2001 | 5/9 Secondary reference Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| 74A731255-2001 | 5/9 Secondary reference Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| 74A731255-2001 | 5/9 Secondary reference Hi-Shear Corporation |
| 74A731255-2001 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-309-7039 is a Screw,cap,socket Head, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-309-7039 has 1 manufacturer part number on file: 74A731255-2001 (The Boeing Company Div Defense).
Key specifications for 74A731255-2001: Width Across Flats: 0.378 INCHES MINIMUM AND 0.383 INCHES MAXIMUM IN; Head Height: 0.750 INCHES NOMINAL IN; Fastener Length: 6.340 INCHES NOMINAL IN; Thread Length: 1.170 INCHES NOMINAL IN. 16 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.