The Bolt,shoulder, cataloged under National Stock Number 5306-01-142-9891, 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 19 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through both NSN and commercial part number lookups. 14 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-142-9891 |
| Primary Part Number | ST3M497-4D6 |
| 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 | 0.756 INCHES MINIMUM AND 0.803 INCHES MAXIMUM IN |
| Shoulder Length | 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.2646 INCHES MINIMUM AND 0.2651 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 |
| Surface Treatment | PASSIVATE OVERALL |
| 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 | 0.635 INCHES MINIMUM AND 0.692 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 |
|---|---|
| ST3M497-4D6 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M497-4D6 | Heartland Precision Fasteners Inc (USA) |
| ST3M497-4D6 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M497-4D6 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| ST3M497-4D6 | Howmet Global Fastening Systems Inc (USA) |
| ST3M497-4D6 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| ST3M497-4D6 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M497-4D6 | Hi-Shear Corporation (USA) |
| ST3M497-4D6 PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M497-4D6 | Huck International, Inc (USA) |
| ST3M497-4D6 | J M Precision Inc (USA) |
| Reference | Meaning |
|---|---|
| ST3M497-4D6 | 5/9 Secondary reference Sps Technologies Inc |
| MB88-4D6 | 5/9 Secondary reference Hi-Shear Corporation |
| PBF1254-4D6 | 5/9 Secondary reference Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| VS3037-4D6 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| 109450-4D6 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| VAL23607-4D6 | 5/9 Secondary reference Valley-Todeco, Inc. Dba Arconic Fastening Systems |
| 109450-4D6 | 5/9 Secondary reference U.S. Government activity |
| VS3037-4D6 | 5/9 Secondary reference U.S. Government activity |
| ST3M497-4D6 | 5/2 Secondary reference U.S. Government activity |
| MA5497-4D6 | 5/9 Secondary reference Abounding Security Inc Div of Maa Corp |
| S11-1061-4D6 | 5/9 Secondary reference Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries |
| BM17019-4D6X | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| HP5497-4D6 | 5/9 Secondary reference Heartland Precision Fasteners Inc |
| BM17019-4D6X | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-142-9891 is a Bolt,shoulder, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-142-9891 has 11 manufacturer part numbers on file: ST3M497-4D6 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), ST3M497-4D6 (Heartland Precision Fasteners Inc), ST3M497-4D6 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), ST3M497-4D6 (Fastener Innovation Technology, Inc. Dba F I T), ST3M497-4D6 (Howmet Global Fastening Systems Inc) and 6 more.
Key specifications for ST3M497-4D6: Head Height: 0.154 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN; Fastener Length: 0.756 INCHES MINIMUM AND 0.803 INCHES MAXIMUM IN; Shoulder Length: 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM FIRST SHOULDER IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 19 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.