The Bolt,shoulder, cataloged under National Stock Number 5306-01-044-5188, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Hi-Shear Corporation. Government technical data includes 17 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through both NSN and commercial part number lookups. 12 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-044-5188 |
| Primary Part Number | MB88-6D17 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Head Height | 0.200 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN |
| Fastener Length | 1.562 INCHES MINIMUM AND 1.609 INCHES MAXIMUM IN |
| Shoulder Length | 1.052 INCHES MINIMUM AND 1.072 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-ST3-497 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 | 1.437 INCHES MINIMUM AND 1.494 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 |
|---|---|
| MB88-6D17 PRIMARY | Hi-Shear Corporation (USA) |
| S11-1061-6D17 PRIMARY | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| HP5497-6D17 PRIMARY | Heartland Precision Fasteners Inc (USA) |
| PBF1254-6D17 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| MB88-6D17 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| VAL23607-6D17X PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M497-6D17 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| VAL23607-6D17 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| Reference | Meaning |
|---|---|
| 109453-6D17X | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| VS3037-6D17 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| ST3M497-6D17 | 5/9 Secondary reference Abounding Security Inc Div of Maa Corp |
| ST3M497-6D17 | 5/2 Secondary reference U.S. Government activity |
| VS3037-6D17 | 5/9 Secondary reference U.S. Government activity |
| ST3M497-6D17 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| 109450-6D17 | 5/9 Secondary reference U.S. Government activity |
| BM17019-6D17X | 5/9 Secondary reference U.S. Government activity |
| MA5497-6D17 | 5/9 Secondary reference Abounding Security Inc Div of Maa Corp |
| 109450-6D17 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| BM17019-6D17X | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| 109453-6D17X | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-044-5188 is a Bolt,shoulder, manufactured by Hi-Shear Corporation, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-044-5188 has 8 manufacturer part numbers on file: MB88-6D17 (Hi-Shear Corporation), S11-1061-6D17 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries), HP5497-6D17 (Heartland Precision Fasteners Inc), PBF1254-6D17 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), MB88-6D17 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc) and 3 more.
Key specifications for MB88-6D17: Head Height: 0.200 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN; Fastener Length: 1.562 INCHES MINIMUM AND 1.609 INCHES MAXIMUM IN; Shoulder Length: 1.052 INCHES MINIMUM AND 1.072 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.