The Bolt,shoulder, cataloged under National Stock Number 5306-01-045-2877, 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 17 specifications, cited from the U.S. Government catalog. The record lists 8 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 12 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-045-2877 |
| Primary Part Number | PBF1366-6D20 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| Status | ACTIVE |
| Head Height | 0.200 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN |
| Fastener Length | 1.750 INCHES MINIMUM AND 1.797 INCHES MAXIMUM IN |
| Shoulder Length | 1.240 INCHES MINIMUM AND 1.260 INCHES MAXIMUM FIRST SHOULDER IN |
| Shoulder Diameter | 0.4052 INCHES MINIMUM AND 0.4057 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.490 INCHES MINIMUM AND 0.557 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Shank Unthreaded Hole Diameter | 0.106 INCHES MINIMUM AND 0.111 INCHES MAXIMUM FIRST HOLE IN |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 76301-ST3-507 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Width Between Flats | 0.553 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 1.625 INCHES MINIMUM AND 1.682 INCHES MAXIMUM FIRST HOLE 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 |
|---|---|
| PBF1366-6D20 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M507-6D20 | M.s. Aerospace Inc. Dba Ms Aerospace Inc (USA) |
| VAL23608-6D20 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M507-6D20 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| MB89-6D20 PRIMARY | Hi-Shear Corporation (USA) |
| MB89-6D20 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HP5507-6D20 | Heartland Precision Fasteners Inc (USA) |
| S11-1062-6D20 PRIMARY | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| Reference | Meaning |
|---|---|
| MA5507-6D20 | 5/9 Secondary reference Abounding Security Inc Div of Maa Corp |
| ST3M507-6D20 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| BM17019-6D20Y | 5/9 Secondary reference U.S. Government activity |
| VS3038-6D20 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| 109453-6D20Y | 3/2 Design control — primary reference U.S. Government activity |
| 109451-6D20 | 3/2 Design control — primary reference U.S. Government activity |
| 109453-6D20Y | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| ST3M507-6D20 | 5/2 Secondary reference U.S. Government activity |
| 109451-6D20 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| ST3M507-6D20 | 5/9 Secondary reference Abounding Security Inc Div of Maa Corp |
| VS3038-6D20 | 5/9 Secondary reference U.S. Government activity |
| BM17019-6D20Y | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
NSN 5306-01-045-2877 is a Bolt,shoulder, manufactured by Sps Technologies Llc Dba PB Fasteners Div PB Fasteners, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-045-2877 has 8 manufacturer part numbers on file: PBF1366-6D20 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), ST3M507-6D20 (M.s. Aerospace Inc. Dba Ms Aerospace Inc), VAL23608-6D20 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), ST3M507-6D20 (Sps Technologies, Llc Dba PB Fasteners), MB89-6D20 (Hi-Shear Corporation) and 3 more.
Key specifications for PBF1366-6D20: Head Height: 0.200 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN; Fastener Length: 1.750 INCHES MINIMUM AND 1.797 INCHES MAXIMUM IN; Shoulder Length: 1.240 INCHES MINIMUM AND 1.260 INCHES MAXIMUM FIRST SHOULDER IN; Shoulder Diameter: 0.4052 INCHES MINIMUM AND 0.4057 INCHES MAXIMUM FIRST SHOULDER IN. 17 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.