The Screw,shoulder, cataloged under National Stock Number 5305-01-266-3052, 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 10 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-266-3052 |
| Primary Part Number | 68A250583-2003 |
| 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 0.383 INCHES MAXIMUM IN |
| Head Height | 1.000 INCHES NOMINAL IN |
| Fastener Length | 4.930 INCHES NOMINAL IN |
| Shoulder Length | 3.867 INCHES MINIMUM AND 3.877 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | PS13001 CAGEC 76301 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.7485 INCHES MINIMUM AND 0.7490 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.933 INCHES NOMINAL IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.625 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 | 18 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 1.1230 INCHES MINIMUM AND 1.1240 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 |
|---|---|
| 68A250583-2003 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| 68A250583-2003 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 68A250583-2003 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| 68A250583-2003 PRIMARY | The Boeing Company Div Defense (USA) |
| 68A250583-2003 | Howmet Global Fastening Systems Inc (USA) |
| 68A250583-2003 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 68A250583-2003 | Heartland Precision Fasteners Inc (USA) |
| 68A250583-2003 | Hi-Shear Corporation (USA) |
| 68A250583-2003 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 68A250583-2003 | Huck International, Inc (USA) |
| Reference | Meaning |
|---|---|
| 68A250583-2003 | 5/9 Secondary reference Sps Technologies Inc |
NSN 5305-01-266-3052 is a Screw,shoulder, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-266-3052 has 10 manufacturer part numbers on file: 68A250583-2003 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries), 68A250583-2003 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), 68A250583-2003 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), 68A250583-2003 (The Boeing Company Div Defense), 68A250583-2003 (Howmet Global Fastening Systems Inc) and 5 more.
Key specifications for 68A250583-2003: Width Across Flats: 0.378 INCHES MINIMUM AND 0.383 INCHES MAXIMUM IN; Head Height: 1.000 INCHES NOMINAL IN; Fastener Length: 4.930 INCHES NOMINAL IN; Shoulder Length: 3.867 INCHES MINIMUM AND 3.877 INCHES MAXIMUM 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.