The Bolt,shoulder, cataloged under National Stock Number 5306-01-617-8643, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba PB Fasteners. Government technical data includes 23 specifications, cited from the U.S. Government catalog. The record lists 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-01-617-8643 |
| Primary Part Number | 74328-4H8Y |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Extended Washer Thickness | 0.059 INCHES MINIMUM AND 0.079 INCHES MAXIMUM IN |
| Head Height | 0.290 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN |
| Fastener Length | 0.968 INCHES NOMINAL IN |
| Shoulder Length | 0.500 INCHES NOMINAL GRIP IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN |
| Shoulder Diameter | 0.2802 INCHES MINIMUM AND 0.2807 INCHES MAXIMUM GRIP IN |
| Thread Length | 0.468 INCHES NOMINAL IN |
| Shoulder Shape | ROUND GRIP |
| Hole Configuration Style | DOUBLE HEXAGON FLATS |
| Material Document and Classification | AMS5629,PH13-8-0 CRES ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.313 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Hole Quantity | 4 |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Hole Type | DRILLED |
| Hole Diameter | 0.032 INCHES MINIMUM AND 0.042 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 |
|---|---|
| ST3M607-4H8 | The Boeing Company Div Defense (USA) |
| 74328-4H8Y PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| VAL23033-4H8X | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| AIC473H4-8 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BM3326-4H8Y | Huck International, Inc (USA) |
| PBF1652-4H8 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| VS3601-4H8 | 5/2 Secondary reference U.S. Government activity |
NSN 5306-01-617-8643 is a Bolt,shoulder, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-617-8643 has 6 manufacturer part numbers on file: ST3M607-4H8 (The Boeing Company Div Defense), 74328-4H8Y (Sps Technologies, Llc Dba PB Fasteners), VAL23033-4H8X (Valley-Todeco, Inc. Dba Arconic Fastening Systems), AIC473H4-8 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), BM3326-4H8Y (Huck International, Inc) and 1 more.
Key specifications for 74328-4H8Y: Extended Washer Thickness: 0.059 INCHES MINIMUM AND 0.079 INCHES MAXIMUM IN; Head Height: 0.290 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN; Fastener Length: 0.968 INCHES NOMINAL IN; Shoulder Length: 0.500 INCHES NOMINAL GRIP IN. 23 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.