The Screw,shoulder, cataloged under National Stock Number 5305-01-047-6345, 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-047-6345 |
| Primary Part Number | ST3M506-5-11 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Fastener Length | 1.129 INCHES MINIMUM AND 1.176 INCHES MAXIMUM IN |
| Shoulder Length | 0.678 INCHES MINIMUM AND 0.698 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.342 INCHES MINIMUM AND 0.343 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.431 INCHES MINIMUM AND 0.498 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 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 | 24 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.461 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 |
|---|---|
| ST3M506-5-11 | Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc (USA) |
| ST3M506-5-11 | Huck International, Inc (USA) |
| ST3M506-5-11 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| ST3M506-5-11 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M506-5-11 | Howmet Global Fastening Systems Inc (USA) |
| ST3M506-5-11 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| ST3M506-5-11 PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M506-5-11 | Hi-Shear Corporation (USA) |
| ST3M506-5-11 | West Coast Aerospace, Inc. (USA) |
| HT4011-5-11 | Huck International, Inc (USA) |
| Reference | Meaning |
|---|---|
| ST3M506 | D/9 Drawing number reference only The Boeing Company Div Defense |
| HT4011-5-11 | 5/9 Secondary reference U.S. Government activity |
| ST3M506-5-11 | 5/9 Secondary reference Sps Technologies Inc |
| HT4011-5-11 | 5/9 Secondary reference U.S. Government activity |
| HT4011-5-11 | 5/9 Secondary reference Hi-Shear Corporation |
| ST3M506-5-11 | 5/2 Secondary reference U.S. Government activity |
| HT4011-5-11 | 5/9 Secondary reference U.S. Government activity |
| HT4011-5-11 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
NSN 5305-01-047-6345 is a Screw,shoulder, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-047-6345 has 10 manufacturer part numbers on file: ST3M506-5-11 (Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc), ST3M506-5-11 (Huck International, Inc), ST3M506-5-11 (Sps Technologies Ltd, Tj Brooks Division), ST3M506-5-11 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), ST3M506-5-11 (Howmet Global Fastening Systems Inc) and 5 more.
1 possible match (shared part number, not a government interchangeability claim): 5305-01-143-2833. Verify interchangeability with system specifications before substitution.
Key specifications for ST3M506-5-11: Fastener Length: 1.129 INCHES MINIMUM AND 1.176 INCHES MAXIMUM IN; Shoulder Length: 0.678 INCHES MINIMUM AND 0.698 INCHES MAXIMUM FIRST SHOULDER IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Shoulder Diameter: 0.342 INCHES MINIMUM AND 0.343 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.