The Bolt,shoulder, cataloged under National Stock Number 5306-01-303-9643, 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 20 specifications, cited from the U.S. Government catalog. The record lists 9 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-303-9643 |
| Primary Part Number | ST3M497-6D8 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.200 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN |
| Fastener Length | 1.000 INCHES MINIMUM AND 1.047 INCHES MAXIMUM IN |
| Shoulder Length | 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.3896 INCHES MINIMUM AND 0.3901 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 |
| Material Document and Classification | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.564 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 0.875 INCHES MINIMUM AND 0.932 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 |
|---|---|
| HP5497-6D8 | Heartland Precision Fasteners Inc (USA) |
| PBF1254-6D8 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M497-6D8 | J M Precision Inc (USA) |
| S11-1061-6D8 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| MB88-6D8 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| MB88-6D8 | Hi-Shear Corporation (USA) |
| ST3M497-6D8 PRIMARY | The Boeing Company Div Defense (USA) |
| VAL23607-6D8 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| 109450-6D8 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| ST3M497-6D8 | 5/9 Secondary reference Abounding Security Inc Div of Maa Corp |
| MA5497-6D8 | 5/9 Secondary reference Abounding Security Inc Div of Maa Corp |
| BM17019-6D8X | 5/9 Secondary reference U.S. Government activity |
| VS3037-6D8 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| VS3037-6D8 | 5/9 Secondary reference U.S. Government activity |
| ST3M497-6D8 | 5/2 Secondary reference U.S. Government activity |
| BM17019-6D8X | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| ST3M497-6D8 | 5/2 Secondary reference U.S. Government activity |
NSN 5306-01-303-9643 is a Bolt,shoulder, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-303-9643 has 9 manufacturer part numbers on file: HP5497-6D8 (Heartland Precision Fasteners Inc), PBF1254-6D8 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), ST3M497-6D8 (J M Precision Inc), S11-1061-6D8 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries), MB88-6D8 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc) and 4 more.
Key specifications for ST3M497-6D8: Head Height: 0.200 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN; Fastener Length: 1.000 INCHES MINIMUM AND 1.047 INCHES MAXIMUM IN; Shoulder Length: 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM FIRST SHOULDER IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 20 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.