The Screw,shoulder, cataloged under National Stock Number 5305-01-181-0806, 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 24 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-181-0806 |
| Primary Part Number | 75A613631-2003 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Fastener Length | 0.936 INCHES NOMINAL IN |
| Shoulder Length | 0.540 INCHES MINIMUM AND 0.550 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | PS13143 TY 1 CL 3,FSCM 76301 MFR REF SINGLE TREATMENT RESPONSE BEARING SURFACE OF HEAD |
| Surface Treatment Document and Classification | PS13143 TY1 CL 3,FSCM 76301 MFR REF SINGLE TREATMENT RESPONSE GRIP |
| Surface Treatment Document and Classification | PS13143 TY1 CL 3,FSCM 76301 MFR REF SINGLE TREATMENT RESPONSE HEAD |
| Shoulder Diameter | 0.3188 INCHES MINIMUM AND 0.3200 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.366 INCHES NOMINAL IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Shank Unthreaded Hole Diameter | 0.076 INCHES MINIMUM AND 0.086 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | MIL-T-9047,COND ANLD MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | ALUMINUM GRIP |
| Surface Treatment | ALUMINUM HEAD |
| Surface Treatment | ALUMINUM BEARING SURFACE OF HEAD |
| Internal Drive Style | SLOT |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | TITANIUM ALLOY OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 0.828 INCHES NOMINAL FIRST HOLE IN |
| Head Diameter | 0.429 INCHES MINIMUM 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 |
|---|---|
| 75A613631-2003 PRIMARY | The Boeing Company Div Defense (USA) |
NSN 5305-01-181-0806 is a Screw,shoulder, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-181-0806 has 1 manufacturer part number on file: 75A613631-2003 (The Boeing Company Div Defense).
Key specifications for 75A613631-2003: Fastener Length: 0.936 INCHES NOMINAL IN; Shoulder Length: 0.540 INCHES MINIMUM AND 0.550 INCHES MAXIMUM FIRST SHOULDER IN; Surface Treatment Document and Classification: PS13143 TY 1 CL 3,FSCM 76301 MFR REF SINGLE TREATMENT RESPONSE BEARING SURFACE OF HEAD; Surface Treatment Document and Classification: PS13143 TY1 CL 3,FSCM 76301 MFR REF SINGLE TREATMENT RESPONSE GRIP. 24 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.