The Bolt,shoulder, cataloged under National Stock Number 5306-01-142-7174, 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 19 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through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-142-7174 |
| Primary Part Number | MB88-5D105 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Head Height | 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN |
| Fastener Length | 7.013 INCHES MINIMUM AND 7.060 INCHES MAXIMUM IN |
| Shoulder Length | 6.552 INCHES MINIMUM AND 6.572 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.3271 INCHES MINIMUM AND 0.3276 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.441 INCHES MINIMUM AND 0.508 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Shank Unthreaded Hole Diameter | 0.076 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.502 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 6.889 INCHES MINIMUM AND 6.946 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 |
|---|---|
| MB88-5D105 PRIMARY | Hi-Shear Corporation (USA) |
| VAL23607-5D105 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M497-5D105 | J M Precision Inc (USA) |
| PBF1254-5D105 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| S11-1061-5D105 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| MB88-5D105 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HP5497-5D105 PRIMARY | Heartland Precision Fasteners Inc (USA) |
| ST3M497-5D105 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M497-5D105 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| VS3037-5D105 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| VS3037-5D105 | 5/9 Secondary reference U.S. Government activity |
| 109450-5D105 | 3/2 Design control — primary reference U.S. Government activity |
| ST3M497-5D105 | 5/2 Secondary reference U.S. Government activity |
| 109450-5D105 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| BM17019-5D105X | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| MA5497-5D105 | 5/9 Secondary reference Abounding Security Inc Div of Maa Corp |
| BM17019-5D105X | 5/9 Secondary reference U.S. Government activity |
| ST3M497-5D105 | 5/9 Secondary reference Abounding Security Inc Div of Maa Corp |
NSN 5306-01-142-7174 is a Bolt,shoulder, manufactured by Hi-Shear Corporation, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-142-7174 has 9 manufacturer part numbers on file: MB88-5D105 (Hi-Shear Corporation), VAL23607-5D105 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), ST3M497-5D105 (J M Precision Inc), PBF1254-5D105 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), S11-1061-5D105 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries) and 4 more.
Key specifications for MB88-5D105: Head Height: 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN; Fastener Length: 7.013 INCHES MINIMUM AND 7.060 INCHES MAXIMUM IN; Shoulder Length: 6.552 INCHES MINIMUM AND 6.572 INCHES MAXIMUM FIRST SHOULDER IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 19 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.