The Bolt,shoulder, cataloged under National Stock Number 5306-01-044-2203, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Carbide Probes, Inc.. Government technical data includes 16 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through both NSN and commercial part number lookups. 10 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-044-2203 |
| Primary Part Number | MA5497-3D26 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Carbide Probes, Inc. |
| 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 | 0.2021 INCHES MINIMUM AND 0.2026 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.305 INCHES MINIMUM AND 0.372 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Shank Unthreaded Hole Diameter | 0.070 INCHES MINIMUM AND 0.075 INCHES MAXIMUM FIRST HOLE IN |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| 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) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 1.819 INCHES MINIMUM AND 1.876 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 |
|---|---|
| ST3M497-3D26 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| MA5497-3D26 PRIMARY | Carbide Probes, Inc. (USA) |
| VAL23607-3D26 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| PBF1254-3D26 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| MB88-3D26 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| S11-1061-3D26 PRIMARY | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| ST3M497-3D26 | J M Precision Inc (USA) |
| MB88-3D26 PRIMARY | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| ST3M497-3D26 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| 109453-3D26X | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| ST3M497-3D26 | 5/2 Secondary reference U.S. Government activity |
| BM17019-3D26X | 5/9 Secondary reference U.S. Government activity |
| 109453-3D26X | 5/9 Secondary reference U.S. Government activity |
| ST3M497-3D26 | 5/9 Secondary reference Abounding Security Inc Div of Maa Corp |
| VS3037-3D26 | 5/9 Secondary reference U.S. Government activity |
| BM17019-3D26X | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| 109450-3D26 | 3/2 Design control — primary reference U.S. Government activity |
| VS3037-3D26 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
NSN 5306-01-044-2203 is a Bolt,shoulder, manufactured by Carbide Probes, Inc., classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-044-2203 has 8 manufacturer part numbers on file: ST3M497-3D26 (Sps Technologies, Llc Dba PB Fasteners), MA5497-3D26 (Carbide Probes, Inc.), VAL23607-3D26 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), PBF1254-3D26 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), MB88-3D26 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc) and 3 more.
Key specifications for MA5497-3D26: 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: 0.2021 INCHES MINIMUM AND 0.2026 INCHES MAXIMUM FIRST SHOULDER IN. 16 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.