The Bolt,shoulder, cataloged under National Stock Number 5306-01-044-6526, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 7 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-044-6526 |
| Primary Part Number | MB88-6D19 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| Status | ACTIVE |
| Head Height | 0.200 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN |
| Fastener Length | 1.688 INCHES MINIMUM AND 1.735 INCHES MAXIMUM IN |
| Shoulder Length | 1.178 INCHES MINIMUM AND 1.189 INCHES MAXIMUM FIRST SHOULDER IN |
| Shoulder Diameter | 0.389 INCHES MINIMUM AND 0.390 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 |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 76301-S3-497 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Width Between Flats | 0.553 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 1.563 INCHES MINIMUM AND 1.620 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 |
|---|---|
| MA5497-6D19 | Abounding Security Inc Div of Maa Corp (USA) |
| MB88-6D19 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| PBF1254-6D19 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 11915-6D19 | Reid Products Inc. Dba Reid Products Inc (USA) |
| VAL23607-6D19 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| S11-1061-6D19 PRIMARY | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| MB88-6D19 PRIMARY | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| 109453-6D19X | 5/9 Secondary reference U.S. Government activity |
| 109453-6D19X | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| VS3037-6D19 | 5/9 Secondary reference U.S. Government activity |
| ST3M497-6D19 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| VS3037-6D19 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| 109450-6D19 | 3/2 Design control — primary reference U.S. Government activity |
| BM17019-6D19X | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-044-6526 is a Bolt,shoulder, manufactured by Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-044-6526 has 7 manufacturer part numbers on file: MA5497-6D19 (Abounding Security Inc Div of Maa Corp), MB88-6D19 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), PBF1254-6D19 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), 11915-6D19 (Reid Products Inc. Dba Reid Products Inc), VAL23607-6D19 (Valley-Todeco, Inc. Dba Arconic Fastening Systems) and 2 more.
Key specifications for MB88-6D19: Head Height: 0.200 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN; Fastener Length: 1.688 INCHES MINIMUM AND 1.735 INCHES MAXIMUM IN; Shoulder Length: 1.178 INCHES MINIMUM AND 1.189 INCHES MAXIMUM FIRST SHOULDER IN; Shoulder Diameter: 0.389 INCHES MINIMUM AND 0.390 INCHES MAXIMUM FIRST SHOULDER IN. 17 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.