The Screw,shoulder, cataloged under National Stock Number 5305-01-203-9347, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Raytheon Company Div Rmd Strategic. Government technical data includes 20 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-203-9347 |
| Primary Part Number | 4177608-20 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Raytheon Company Div Rmd Strategic |
| Status | ACTIVE |
| Width Across Flats | 0.500 INCHES NOMINAL IN |
| Head Height | 0.610 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN |
| Fastener Length | 3.465 INCHES MINIMUM AND 3.505 INCHES MAXIMUM IN |
| Shoulder Length | 2.495 INCHES MINIMUM AND 2.505 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-416,TY2,CL3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.996 INCHES MINIMUM AND 0.998 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.970 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Hardness Rating | 32.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Thread Diameter | 0.750 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Minimum Tensile Strength | 140000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 10 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 1.287 INCHES MINIMUM AND 1.312 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 |
|---|---|
| 4177608-20 PRIMARY | Raytheon Company Div Rmd Strategic (USA) |
| Reference | Meaning |
|---|---|
| MS51975-64 | 3/2 Design control — primary reference U.S. Government activity |
| MS51975-64 | 5/9 Secondary reference U.S. Government activity |
| MS519757-64 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 5305-01-203-9347 is a Screw,shoulder, manufactured by Raytheon Company Div Rmd Strategic, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-203-9347 has 1 manufacturer part number on file: 4177608-20 (Raytheon Company Div Rmd Strategic).
Key specifications for 4177608-20: Width Across Flats: 0.500 INCHES NOMINAL IN; Head Height: 0.610 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN; Fastener Length: 3.465 INCHES MINIMUM AND 3.505 INCHES MAXIMUM IN; Shoulder Length: 2.495 INCHES MINIMUM AND 2.505 INCHES MAXIMUM FIRST SHOULDER IN. 20 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.