The Bolt,shoulder, cataloged under National Stock Number 5306-01-044-2958, 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 15 specifications, cited from the U.S. Government catalog. The record lists 9 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-044-2958 |
| Primary Part Number | MB88-3-3 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Head Height | 0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN |
| Fastener Length | 0.503 INCHES MINIMUM AND 0.550 INCHES MAXIMUM IN |
| Shoulder Length | 0.178 INCHES MINIMUM AND 0.198 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 |
|---|---|
| MB88-3-3 PRIMARY | Hi-Shear Corporation (USA) |
| 11915-3-3 | Reid Products Inc. Dba Reid Products Inc (USA) |
| PBF1254-3-3 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| S11-1061-3-3 PRIMARY | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| HP5497-3-3 PRIMARY | Heartland Precision Fasteners Inc (USA) |
| VAL23607-3-3 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| MB88-3-3 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| MA5497-3-3 | Abounding Security Inc Div of Maa Corp (USA) |
| ST3M497-3-3 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| Reference | Meaning |
|---|---|
| BM17019-3-3X | 5/9 Secondary reference U.S. Government activity |
| 109450-3-3 | 3/2 Design control — primary reference U.S. Government activity |
| 109453-3-3X | 5/9 Secondary reference U.S. Government activity |
| 109453-3-3X | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| ST3M497-3-3 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| VS3037-3-3 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-044-2958 is a Bolt,shoulder, manufactured by Hi-Shear Corporation, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-044-2958 has 9 manufacturer part numbers on file: MB88-3-3 (Hi-Shear Corporation), 11915-3-3 (Reid Products Inc. Dba Reid Products Inc), PBF1254-3-3 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), S11-1061-3-3 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries), HP5497-3-3 (Heartland Precision Fasteners Inc) and 4 more.
Key specifications for MB88-3-3: Head Height: 0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN; Fastener Length: 0.503 INCHES MINIMUM AND 0.550 INCHES MAXIMUM IN; Shoulder Length: 0.178 INCHES MINIMUM AND 0.198 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.