The Screw,shoulder, cataloged under National Stock Number 5305-01-260-0432, 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 20 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-260-0432 |
| Primary Part Number | 75A304021-2007 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Width Across Flats | 0.378 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN |
| Head Height | 0.675 INCHES NOMINAL IN |
| Fastener Length | 2.431 INCHES NOMINAL IN |
| Shoulder Length | 0.875 INCHES NOMINAL FIRST SHOULDER IN |
| Shoulder Length | 0.380 INCHES NOMINAL SECOND SHOULDER IN |
| Shoulder Diameter | 0.363 INCHES MINIMUM AND 0.370 INCHES MAXIMUM SECOND SHOULDER IN |
| Shoulder Diameter | 0.570 INCHES MINIMUM AND 0.580 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.600 INCHES NOMINAL IN |
| Shoulder Shape | ROUND ALL SHOULDERS |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | SQUARE |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.750 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 | X |
| Part Number | Manufacturer |
|---|---|
| 75A304021-2007 PRIMARY | The Boeing Company Div Defense (USA) |
| PL75A304021 | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 75A304-21-2007 | C/1 Advisory reference — outside the item-of-supply concept Carden Machine Shop, Inc. |
NSN 5305-01-260-0432 is a Screw,shoulder, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-260-0432 has 2 manufacturer part numbers on file: 75A304021-2007 (The Boeing Company Div Defense), PL75A304021 (The Boeing Company Div Defense).
Key specifications for 75A304021-2007: Width Across Flats: 0.378 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN; Head Height: 0.675 INCHES NOMINAL IN; Fastener Length: 2.431 INCHES NOMINAL IN; Shoulder Length: 0.875 INCHES NOMINAL FIRST SHOULDER IN. 20 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.