The Screw,shoulder, cataloged under National Stock Number 5305-01-025-4374, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Air Industries Machining, Corp. Dba Air Industries Machining Corp. Government technical data includes 18 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-025-4374 |
| Primary Part Number | AC129436 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Air Industries Machining, Corp. Dba Air Industries Machining Corp |
| Status | ACTIVE |
| Width Across Flats | 0.156 INCHES MAXIMUM IN |
| Head Height | 0.156 INCHES MINIMUM AND 0.213 INCHES MAXIMUM IN |
| Fastener Length | 1.914 INCHES MINIMUM AND 1.940 INCHES MAXIMUM IN |
| Shoulder Length | 1.497 INCHES MINIMUM AND 1.503 INCHES MAXIMUM FIRST SHOULDER IN |
| Shoulder Diameter | 0.310 INCHES MINIMUM AND 0.311 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.342 INCHES MINIMUM AND 0.362 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Hardness Rating | 36.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | KNURLED NO. 1 |
| Thread Direction | RIGHT-HAND |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNRC |
| Head Diameter | 0.419 INCHES MINIMUM AND 0.438 INCHES MAXIMUM 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 |
|---|---|
| AC129436 | Air Industries Machining, Corp. Dba Air Industries Machining Corp (USA) |
| Reference | Meaning |
|---|---|
| AC-331336 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| AC129436 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| 12705L-5C-24 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| 12705L5C24 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 12705L-5C-24 | 5/9 Secondary reference U.S. Government activity |
| AC129436 | 3/9 Design control — primary reference Tlt-Babcock, Inc. |
| AC-3313-36 | 5/9 Secondary reference Tlt-Babcock, Inc. |
NSN 5305-01-025-4374 is a Screw,shoulder, manufactured by Air Industries Machining, Corp. Dba Air Industries Machining Corp, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-025-4374 has 1 manufacturer part number on file: AC129436 (Air Industries Machining, Corp. Dba Air Industries Machining Corp).
Key specifications for AC129436: Width Across Flats: 0.156 INCHES MAXIMUM IN; Head Height: 0.156 INCHES MINIMUM AND 0.213 INCHES MAXIMUM IN; Fastener Length: 1.914 INCHES MINIMUM AND 1.940 INCHES MAXIMUM IN; Shoulder Length: 1.497 INCHES MINIMUM AND 1.503 INCHES MAXIMUM FIRST SHOULDER IN. 18 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.