The Screw,shoulder, cataloged under National Stock Number 5305-01-142-9408, 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 18 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-142-9408 |
| Primary Part Number | 3M957-3-2-6 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Fastener Length | 0.485 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN |
| Shoulder Length | 0.065 INCHES MINIMUM AND 0.093 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.2177 INCHES MINIMUM AND 0.2182 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.350 INCHES MINIMUM AND 0.400 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | OVAL COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.328 INCHES MINIMUM AND 0.333 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 |
|---|---|
| 3M957-3-2-6 PRIMARY | The Boeing Company Div Defense (USA) |
| HT4041-3-2-6Y | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4041-3-2-6Y | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| HT4041-3-2-6Y | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| 3M957-3-2-6 | 5/2 Secondary reference U.S. Government activity |
| HT4041-3-2-6Y | 5/2 Secondary reference U.S. Government activity |
| HT4041-3-2-6Y | 5/9 Secondary reference U.S. Government activity |
| HT4041-3-2-6Y | 5/9 Secondary reference U.S. Government activity |
| ST3M653 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| HT4041-3-2-6Y | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
NSN 5305-01-142-9408 is a Screw,shoulder, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-142-9408 has 3 manufacturer part numbers on file: 3M957-3-2-6 (The Boeing Company Div Defense), HT4041-3-2-6Y (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HT4041-3-2-6Y (Hi-Shear Corporation).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-142-9424. Verify interchangeability with system specifications before substitution.
Key specifications for 3M957-3-2-6: Fastener Length: 0.485 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN; Shoulder Length: 0.065 INCHES MINIMUM AND 0.093 INCHES MAXIMUM FIRST SHOULDER IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Shoulder Diameter: 0.2177 INCHES MINIMUM AND 0.2182 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.