The Bolt,shoulder, cataloged under National Stock Number 5306-01-044-6541, 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 11 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-044-6541 |
| Primary Part Number | ST3M497-3-17 |
| 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 | 1.377 INCHES MINIMUM AND 1.424 INCHES MAXIMUM IN |
| Shoulder Length | 1.052 INCHES MINIMUM AND 1.072 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 |
|---|---|
| MB88-3-17 | Hi-Shear Corporation (USA) |
| MB88-3-17 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| PBF1254-3-17 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| MA5497-3-17 | Abounding Security Inc Div of Maa Corp (USA) |
| S11-1061-3-17 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| 11915-1317 | Reid Products Inc. Dba Reid Products Inc (USA) |
| HP5497-3-17 | Heartland Precision Fasteners Inc (USA) |
| VAL23607-3-17 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M497-3-17 PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M497-1317 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| 11915-3-17 | Reid Products Inc. Dba Reid Products Inc (USA) |
| Reference | Meaning |
|---|---|
| VS3037-3-17 | 5/9 Secondary reference U.S. Government activity |
| 109450-3-17 | 5/2 Secondary reference U.S. Government activity |
| VS3037-3-17 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| 109453-3-17X | 5/9 Secondary reference U.S. Government activity |
| ST3M497 | D/9 Drawing number reference only The Boeing Company Div Defense |
| 109453-3-17X | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| BM17019-3-17X | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-044-6541 is a Bolt,shoulder, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-044-6541 has 11 manufacturer part numbers on file: MB88-3-17 (Hi-Shear Corporation), MB88-3-17 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), PBF1254-3-17 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), MA5497-3-17 (Abounding Security Inc Div of Maa Corp), S11-1061-3-17 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries) and 6 more.
4 possible matches (shared part number, not a government interchangeability claim): 5306-01-046-1198, 5306-01-475-2169, 5306-01-475-2619. Verify interchangeability with system specifications before substitution.
Key specifications for ST3M497-3-17: Head Height: 0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN; Fastener Length: 1.377 INCHES MINIMUM AND 1.424 INCHES MAXIMUM IN; Shoulder Length: 1.052 INCHES MINIMUM AND 1.072 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.