The Screw,shoulder, cataloged under National Stock Number 5305-01-050-4307, 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 10 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-050-4307 |
| Primary Part Number | ST3M496-3-17 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Fastener Length | 1.378 INCHES MINIMUM AND 1.408 INCHES MAXIMUM IN |
| Shoulder Length | 0.979 INCHES MINIMUM AND 0.999 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.2021 INCHES MINIMUM AND 0.2026 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.306 INCHES MINIMUM AND 0.356 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 |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | PASSIVATE 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 | 32 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.338 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 |
|---|---|
| ST3M496-3-17 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M496-3-17 | Howmet Global Fastening Systems Inc (USA) |
| ST3M496-3-17 PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M496-3-17 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| WC4008-3-17 | West Coast Aerospace, Inc. (USA) |
| ST3M496-3-17 | Huck International, Inc (USA) |
| ST3M496-3-17 | Hi-Shear Corporation (USA) |
| ST3M496-3-17 | West Coast Aerospace, Inc. (USA) |
| HT4008-3-17 | Howmet Global Fastening Systems Inc (USA) |
| HT4008-3-17 | Huck International, Inc (USA) |
| Reference | Meaning |
|---|---|
| HT4008-3-17 | 5/9 Secondary reference Sps Technologies Inc |
| ST3M496-3-17 | 5/9 Secondary reference Sps Technologies Inc |
| HT4008-3-17 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| HT4008-3-17 | 5/9 Secondary reference U.S. Government activity |
| ST3M496-3-17 | 5/2 Secondary reference U.S. Government activity |
| HT4008-3-17 | 5/9 Secondary reference U.S. Government activity |
| HT4008-3-17 | 5/9 Secondary reference U.S. Government activity |
| HT4008-3-17 | 5/9 Secondary reference Hi-Shear Corporation |
NSN 5305-01-050-4307 is a Screw,shoulder, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-050-4307 has 10 manufacturer part numbers on file: ST3M496-3-17 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), ST3M496-3-17 (Howmet Global Fastening Systems Inc), ST3M496-3-17 (The Boeing Company Div Defense), ST3M496-3-17 (Fastener Innovation Technology, Inc. Dba F I T), WC4008-3-17 (West Coast Aerospace, Inc.) and 5 more.
Key specifications for ST3M496-3-17: Fastener Length: 1.378 INCHES MINIMUM AND 1.408 INCHES MAXIMUM IN; Shoulder Length: 0.979 INCHES MINIMUM AND 0.999 INCHES MAXIMUM FIRST SHOULDER IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Shoulder Diameter: 0.2021 INCHES MINIMUM AND 0.2026 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.