The Bolt,shoulder, cataloged under National Stock Number 5306-01-261-1866, 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 18 specifications, cited from the U.S. Government catalog. The record lists 14 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-261-1866 |
| Primary Part Number | ST3M497-4-6 |
| 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 | 0.757 INCHES MINIMUM AND 0.787 INCHES MAXIMUM IN |
| Shoulder Length | 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM ALL SHOULDERS IN |
| Surface Treatment Document and Classification | MIL-S-5002 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.264 INCHES MINIMUM AND 0.265 INCHES MAXIMUM ALL SHOULDERS IN |
| Thread Length | 0.397 INCHES NOMINAL IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| 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 | 0.438 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 7530 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| 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 |
|---|---|
| ST3M497-4-6 PRIMARY | The Boeing Company Div Defense (USA) |
| PBF1254-4-6 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M497-4-6 | Howmet Global Fastening Systems Inc (USA) |
| ST3M497-4-6 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HP5497-4-6 | Heartland Precision Fasteners Inc (USA) |
| ST3M497-4-6 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| ST3M497-4-6 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| ST3M497-4-6 | Houston Precision Fasteners I Lp (USA) |
| S11-1061-4-6 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| WC497-4-6 | West Coast Aerospace, Inc. (USA) |
| MB88-4-6 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M497-4-6 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| MB88-4-6 PRIMARY | Hi-Shear Corporation (USA) |
| VAL23607-4-6 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| Reference | Meaning |
|---|---|
| VS3037-4-6 | 5/2 Secondary reference U.S. Government activity |
| MA5497-4-6 | 5/9 Secondary reference Abounding Security Inc Div of Maa Corp |
| BM17019-4-6X | 5/9 Secondary reference U.S. Government activity |
| ST3M497-4-6 | 5/2 Secondary reference U.S. Government activity |
| 109450-4-6 | 3/2 Design control — primary reference U.S. Government activity |
| BM17019-4-6X | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| VS3037-4-6 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
NSN 5306-01-261-1866 is a Bolt,shoulder, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-261-1866 has 14 manufacturer part numbers on file: ST3M497-4-6 (The Boeing Company Div Defense), PBF1254-4-6 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), ST3M497-4-6 (Howmet Global Fastening Systems Inc), ST3M497-4-6 (Sps Technologies, Llc Dba PB Fasteners), HP5497-4-6 (Heartland Precision Fasteners Inc) and 9 more.
Key specifications for ST3M497-4-6: Head Height: 0.154 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN; Fastener Length: 0.757 INCHES MINIMUM AND 0.787 INCHES MAXIMUM IN; Shoulder Length: 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM ALL SHOULDERS IN; Surface Treatment Document and Classification: MIL-S-5002 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 18 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.