The Screw,shoulder, cataloged under National Stock Number 5305-01-235-7495, 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 19 specifications, cited from the U.S. Government catalog. The record lists 9 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-235-7495 |
| Primary Part Number | 3M1131-2 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Width Across Flats | 0.156 INCHES MINIMUM AND 0.158 INCHES MAXIMUM IN |
| Head Height | 0.035 INCHES MINIMUM AND 0.045 INCHES MAXIMUM IN |
| Fastener Length | 0.625 INCHES NOMINAL IN |
| Shoulder Length | 0.300 INCHES NOMINAL FIRST SHOULDER IN |
| Surface Treatment Document and Classification | P.S. 13105 FSCM 76301 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.250 INCHES NOMINAL FIRST SHOULDER IN |
| Thread Length | 0.255 INCHES NOMINAL IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.164 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | NICKEL OVERALL |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNJC |
| Head Diameter | 0.360 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 |
|---|---|
| 3M1131-2 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 3M1131-2 | Howmet Global Fastening Systems Inc. Div Voi-Shan Products (USA) |
| 3M1131-2 | G.s. Precision, Inc. (USA) |
| 3M1131-2 | Hi Rel Connectors, Inc. Dba Hi Rel Connectors Inc (USA) |
| 0018-020-000 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 3M1131-2 | Huck International, Inc (USA) |
| 3M1131-2 | Hi-Shear Corporation (USA) |
| 3M1131-2 | Abounding Security Inc Div of Maa Corp (USA) |
| 3M1131-2 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 3M1131-2 | 5/2 Secondary reference U.S. Government activity |
| 3M1131-2 | 5/2 Secondary reference U.S. Government activity |
NSN 5305-01-235-7495 is a Screw,shoulder, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-235-7495 has 9 manufacturer part numbers on file: 3M1131-2 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), 3M1131-2 (Howmet Global Fastening Systems Inc. Div Voi-Shan Products), 3M1131-2 (G.s. Precision, Inc.), 3M1131-2 (Hi Rel Connectors, Inc. Dba Hi Rel Connectors Inc), 0018-020-000 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company) and 4 more.
Key specifications for 3M1131-2: Width Across Flats: 0.156 INCHES MINIMUM AND 0.158 INCHES MAXIMUM IN; Head Height: 0.035 INCHES MINIMUM AND 0.045 INCHES MAXIMUM IN; Fastener Length: 0.625 INCHES NOMINAL IN; Shoulder Length: 0.300 INCHES NOMINAL FIRST SHOULDER IN. 19 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.