The Bolt,shoulder, cataloged under National Stock Number 5306-01-046-0503, 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 Div PB Fasteners. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 11 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-046-0503 |
| Primary Part Number | PBF1366-4-8 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| Status | ACTIVE |
| Head Height | 0.154 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN |
| Fastener Length | 0.881 INCHES MINIMUM AND 0.928 INCHES MAXIMUM IN |
| Shoulder Length | 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM FIRST SHOULDER IN |
| Shoulder Diameter | 0.2802 INCHES MINIMUM AND 0.2807 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.371 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 76301-ST3-507 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Width Between Flats | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL 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 |
|---|---|
| PBF1366-4-8 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| VAL23608-4-8 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| S11-1062-4-8 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| VS3038-4-8 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| MB89-4-8 | Hi-Shear Corporation (USA) |
| ST3M507-4-8 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| MB89-4-8 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M507-4-8 PRIMARY | The Boeing Company Div Defense (USA) |
| HP5507-4-8 | Heartland Precision Fasteners Inc (USA) |
| ST3M507-4-8 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| BM17019-48Y PRIMARY | Huck International, Inc (USA) |
| Reference | Meaning |
|---|---|
| MA5507-4-8 | 5/9 Secondary reference Abounding Security Inc Div of Maa Corp |
| ST3M507-4-8 | 5/9 Secondary reference Abounding Security Inc Div of Maa Corp |
| VS3038-4-8 | 5/2 Secondary reference U.S. Government activity |
| 109451-4-8 | 5/2 Secondary reference U.S. Government activity |
| 109453-4-8Y | 5/2 Secondary reference U.S. Government activity |
| 109451-4-8 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| 109453-4-8Y | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| BM17019-4-8Y | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-046-0503 is a Bolt,shoulder, manufactured by Sps Technologies Llc Dba PB Fasteners Div PB Fasteners, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-046-0503 has 11 manufacturer part numbers on file: PBF1366-4-8 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), VAL23608-4-8 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), S11-1062-4-8 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries), VS3038-4-8 (Howmet Global Fastening Systems Inc), MB89-4-8 (Hi-Shear Corporation) and 6 more.
Key specifications for PBF1366-4-8: Head Height: 0.154 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN; Fastener Length: 0.881 INCHES MINIMUM AND 0.928 INCHES MAXIMUM IN; Shoulder Length: 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM FIRST SHOULDER IN; Shoulder Diameter: 0.2802 INCHES MINIMUM AND 0.2807 INCHES MAXIMUM FIRST SHOULDER IN. 15 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.