The Screw,shoulder, cataloged under National Stock Number 5305-01-235-6450, 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 17 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 | 5305-01-235-6450 |
| Primary Part Number | ST3M547-4-8 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Fastener Length | 0.881 INCHES MINIMUM AND 0.928 INCHES MAXIMUM IN |
| Shoulder Length | 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | MAC PS 13145 FSCM 76301 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.2797 INCHES MINIMUM AND 0.2807 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.371 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | CADMIUM 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 | 28 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.497 INCHES MINIMUM AND 0.507 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 |
|---|---|
| ST3M547-4-8 PRIMARY | The Boeing Company Div Defense (USA) |
NSN 5305-01-235-6450 is a Screw,shoulder, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-235-6450 has 1 manufacturer part number on file: ST3M547-4-8 (The Boeing Company Div Defense).
Key specifications for ST3M547-4-8: Fastener Length: 0.881 INCHES MINIMUM AND 0.928 INCHES MAXIMUM IN; Shoulder Length: 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM FIRST SHOULDER IN; Surface Treatment Document and Classification: MAC PS 13145 FSCM 76301 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Shoulder Diameter: 0.2797 INCHES MINIMUM AND 0.2807 INCHES MAXIMUM FIRST SHOULDER IN. 17 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.