The Bolt,shoulder, cataloged under National Stock Number 5306-01-045-9527, 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 15 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-045-9527 |
| Primary Part Number | ST3M497-3-26 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN |
| Fastener Length | 1.940 INCHES MINIMUM AND 1.987 INCHES MAXIMUM IN |
| Shoulder Length | 1.615 INCHES MINIMUM AND 1.635 INCHES MAXIMUM FIRST SHOULDER IN |
| Shoulder Diameter | 0.202 INCHES MINIMUM AND 0.203 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.305 INCHES MINIMUM AND 0.372 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 76301-ST3-497 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Width Between Flats | 0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL 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 |
|---|---|
| MB88-3-26 | Hi-Shear Corporation (USA) |
| HP5497-3-26 | Heartland Precision Fasteners Inc (USA) |
| MB88-3-26 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| PBF1254-3-26 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M497-3-26 PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M497-3-26 | J M Precision Inc (USA) |
| VAL23607-3-26 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| S11-1061-3-26 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| Reference | Meaning |
|---|---|
| BM17019-3-26X | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| 109450-3-26 | 5/2 Secondary reference U.S. Government activity |
| VS3037-3-26 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
NSN 5306-01-045-9527 is a Bolt,shoulder, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-045-9527 has 8 manufacturer part numbers on file: MB88-3-26 (Hi-Shear Corporation), HP5497-3-26 (Heartland Precision Fasteners Inc), MB88-3-26 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), PBF1254-3-26 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), ST3M497-3-26 (The Boeing Company Div Defense) and 3 more.
Key specifications for ST3M497-3-26: Head Height: 0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN; Fastener Length: 1.940 INCHES MINIMUM AND 1.987 INCHES MAXIMUM IN; Shoulder Length: 1.615 INCHES MINIMUM AND 1.635 INCHES MAXIMUM FIRST SHOULDER IN; Shoulder Diameter: 0.202 INCHES MINIMUM AND 0.203 INCHES MAXIMUM FIRST SHOULDER IN. 15 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.