The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-170-8481, 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 18 specifications, cited from the U.S. Government catalog. The record lists 14 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-170-8481 |
| Primary Part Number | MB154-6D19 |
| Item Name | Bolt,close Tolerance |
| 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 | 1.569 INCHES MINIMUM AND 1.589 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.371 INCHES MINIMUM AND 0.411 INCHES MAXIMUM IN |
| Shank Unthreaded Hole Diameter | 0.106 INCHES MINIMUM AND 0.111 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | SPLINE DRIVE SHEAR HEAD |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.178 INCHES MINIMUM AND 1.198 INCHES MAXIMUM IN |
| Width Between Flats | 0.578 INCHES MINIMUM AND 0.585 INCHES MAXIMUM IN |
| Grip Diameter | 0.3740 INCHES MINIMUM AND 0.3745 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 | 1.451 INCHES MINIMUM AND 1.481 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 |
|---|---|
| MB154-6D19 PRIMARY | Hi-Shear Corporation (USA) |
| MB154-6D19 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| PBF1265-6D19 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| GS1015-6D19 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| AIC687-6D19 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M744-6D19 | Heartland Precision Fasteners Inc (USA) |
| ST3M744-6D19 | Houston Precision Fasteners I Lp (USA) |
| 122895-6D19 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 11823-6D19 | Reid Products Inc. Dba Reid Products Inc (USA) |
| VCG0001-6D19 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| S406-6D19 PRIMARY | Huck International, Inc (USA) |
| VS3174-6D19 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| ST3M744-6D19 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| ST3M744-6D19 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| S406-6D19 | 5/9 Secondary reference U.S. Government activity |
| VS3174-6D19 | 5/9 Secondary reference U.S. Government activity |
| WC744-6D19 | 5/9 Secondary reference Dynaquip Controls Corporation |
| 122895-6D19 | 3/2 Design control — primary reference U.S. Government activity |
| 10116081 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5306-01-170-8481 is a Bolt,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-170-8481 has 14 manufacturer part numbers on file: MB154-6D19 (Hi-Shear Corporation), MB154-6D19 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), PBF1265-6D19 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), GS1015-6D19 (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace), AIC687-6D19 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company) and 9 more.
Key specifications for MB154-6D19: Head Height: 0.200 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN; Fastener Length: 1.569 INCHES MINIMUM AND 1.589 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.371 INCHES MINIMUM AND 0.411 INCHES MAXIMUM IN. 18 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.