The Bolt,shoulder, cataloged under National Stock Number 5306-01-141-7876, 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 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-141-7876 |
| Primary Part Number | ST3M507-4D26 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.154 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN |
| Fastener Length | 2.006 INCHES MINIMUM AND 2.053 INCHES MAXIMUM IN |
| Shoulder Length | 1.615 INCHES MINIMUM AND 1.635 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 |
| Shank Unthreaded Hole Diameter | 0.076 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.439 INCHES MAXIMUM IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 1.885 INCHES MINIMUM AND 1.942 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 |
|---|---|
| MB89-4D26 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| VAL23608-4D26 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M507-4D26 PRIMARY | The Boeing Company Div Defense (USA) |
| S11-1062-4D26 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| MB89-4D26 | Hi-Shear Corporation (USA) |
| PBF1366-4D26 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 109451-4D26 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 11921-4D26 | Reid Products Inc. Dba Reid Products Inc (USA) |
| Reference | Meaning |
|---|---|
| VS3038-4D26 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| BM17019-4D26Y | 5/9 Secondary reference U.S. Government activity |
| BM17019-4D26Y | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| MA5507-4D26 | 5/9 Secondary reference Abounding Security Inc Div of Maa Corp |
| 109451-4D26 | 5/9 Secondary reference U.S. Government activity |
| VS3038-4D26 | 5/2 Secondary reference U.S. Government activity |
NSN 5306-01-141-7876 is a Bolt,shoulder, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-141-7876 has 8 manufacturer part numbers on file: MB89-4D26 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), VAL23608-4D26 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), ST3M507-4D26 (The Boeing Company Div Defense), S11-1062-4D26 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries), MB89-4D26 (Hi-Shear Corporation) and 3 more.
Key specifications for ST3M507-4D26: Head Height: 0.154 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN; Fastener Length: 2.006 INCHES MINIMUM AND 2.053 INCHES MAXIMUM IN; Shoulder Length: 1.615 INCHES MINIMUM AND 1.635 INCHES MAXIMUM FIRST SHOULDER IN; Shoulder Diameter: 0.2802 INCHES MINIMUM AND 0.2807 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.