The Bolt,shoulder, cataloged under National Stock Number 5306-01-237-4977, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 7 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-237-4977 |
| Primary Part Number | ST3M607-6-52 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Extended Washer Thickness | 0.081 INCHES MINIMUM AND 0.101 INCHES MAXIMUM IN |
| Head Height | 0.378 INCHES MINIMUM AND 0.398 INCHES MAXIMUM IN |
| Fastener Length | 3.849 INCHES MINIMUM AND 3.879 INCHES MAXIMUM IN |
| Shoulder Length | 3.240 INCHES MINIMUM AND 3.260 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 0.639 INCHES MINIMUM AND 0.649 INCHES MAXIMUM IN |
| Shoulder Diameter | 0.4052 INCHES MINIMUM AND 0.4057 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.589 INCHES MINIMUM AND 0.639 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 220000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| 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 |
|---|---|
| 74328-6-52Y | Sps Technologies, Llc Dba PB Fasteners (USA) |
| MB87-6-52 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| MB87-6-52 | Hi-Shear Corporation (USA) |
| ST3M607-6-52 | Reid Products Inc. Dba Reid Products Inc (USA) |
| VAL23033-6-52 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| BM3326-6-52 | Huck International, Inc (USA) |
| ST3M607-6-52 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| VS3061-6-52 | 5/2 Secondary reference U.S. Government activity |
NSN 5306-01-237-4977 is a Bolt,shoulder, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-237-4977 has 7 manufacturer part numbers on file: 74328-6-52Y (Sps Technologies, Llc Dba PB Fasteners), MB87-6-52 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), MB87-6-52 (Hi-Shear Corporation), ST3M607-6-52 (Reid Products Inc. Dba Reid Products Inc), VAL23033-6-52 (Valley-Todeco, Inc. Dba Arconic Fastening Systems) and 2 more.
Key specifications for ST3M607-6-52: Extended Washer Thickness: 0.081 INCHES MINIMUM AND 0.101 INCHES MAXIMUM IN; Head Height: 0.378 INCHES MINIMUM AND 0.398 INCHES MAXIMUM IN; Fastener Length: 3.849 INCHES MINIMUM AND 3.879 INCHES MAXIMUM IN; Shoulder Length: 3.240 INCHES MINIMUM AND 3.260 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.