The Screw,shoulder, cataloged under National Stock Number 5305-01-141-7904, 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 18 specifications, cited from the U.S. Government catalog. The record lists 8 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-141-7904 |
| Primary Part Number | 3M902C3-4D |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.0320 INCHES MINIMUM AND 0.0340 INCHES MAXIMUM IN |
| Fastener Length | 0.640 INCHES MINIMUM AND 0.687 INCHES MAXIMUM IN |
| Shoulder Length | 0.206 INCHES MINIMUM AND 0.228 INCHES MAXIMUM FIRST SHOULDER IN |
| Shoulder Diameter | 0.2177 INCHES MINIMUM AND 0.2182 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.380 INCHES MINIMUM AND 0.447 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT COUNTERSUNK UNDERCUT |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.377 INCHES MINIMUM AND 0.381 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 |
|---|---|
| WC4020-34Y | West Coast Aerospace, Inc. (USA) |
| HT4020-3-4Y | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 3M902C3-4D PRIMARY | The Boeing Company Div Defense (USA) |
| HT4020-3-4Y | Howmet Global Fastening Systems Inc (USA) |
| HT4020-3-4Y | Hi-Shear Corporation (USA) |
| 3M902C3-4D | Huck International, Inc (USA) |
| 3M902C3-4D | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| 11879C3-4D | Reid Products Inc. Dba Reid Products Inc (USA) |
| Reference | Meaning |
|---|---|
| HT4020-3-4Y | 5/9 Secondary reference U.S. Government activity |
| 3M902C3-4D | 5/9 Secondary reference U.S. Government activity |
| HT4020-3-4Y | 5/2 Secondary reference U.S. Government activity |
| HT4020-3-4Y | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-141-7904 is a Screw,shoulder, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-141-7904 has 8 manufacturer part numbers on file: WC4020-34Y (West Coast Aerospace, Inc.), HT4020-3-4Y (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), 3M902C3-4D (The Boeing Company Div Defense), HT4020-3-4Y (Howmet Global Fastening Systems Inc), HT4020-3-4Y (Hi-Shear Corporation) and 3 more.
Key specifications for 3M902C3-4D: Head Height: 0.0320 INCHES MINIMUM AND 0.0340 INCHES MAXIMUM IN; Fastener Length: 0.640 INCHES MINIMUM AND 0.687 INCHES MAXIMUM IN; Shoulder Length: 0.206 INCHES MINIMUM AND 0.228 INCHES MAXIMUM FIRST SHOULDER IN; Shoulder Diameter: 0.2177 INCHES MINIMUM AND 0.2182 INCHES MAXIMUM FIRST SHOULDER IN. 18 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.