The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-286-8472, 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 11 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-286-8472 |
| Primary Part Number | MB155-9D45 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Head Height | 0.328 INCHES NOMINAL IN |
| Fastener Length | 3.521 INCHES MINIMUM AND 3.568 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.725 INCHES NOMINAL IN |
| Shank Unthreaded Hole Diameter | 0.141 INCHES MINIMUM AND 0.146 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.562 INCHES IN |
| Head Style | SPLINE DRIVE SHEAR HEAD |
| Thread Direction | RIGHT-HAND |
| Grip Length | 2.802 INCHES MINIMUM AND 2.822 INCHES MAXIMUM IN |
| Head Minor Diameter | 0.908 INCHES NOMINAL IN |
| Grip Diameter | 0.5610 INCHES MINIMUM AND 0.5615 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 3.413 INCHES NOMINAL 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 |
|---|---|
| ST3M747-9D45 | Huck International, Inc (USA) |
| MB155-9D45 PRIMARY | Hi-Shear Corporation (USA) |
| ST3M747-9D45 | Heartland Precision Fasteners Inc (USA) |
| AIC688-9D45 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| VCG0002-9D45 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M747-9D45 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| MB155-9D45 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| S397-9D45 PRIMARY | Huck International, Inc (USA) |
| PBF 1266-9D45 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M747-9D45 | P.s. Machine Company, Inc. (USA) |
| VS3191-9D45 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| 122896-9D45 | 3/2 Design control — primary reference U.S. Government activity |
| ST3M747-9D45 | 5/9 Secondary reference Sps Technologies Inc |
| VS3191-9D45 | 5/9 Secondary reference U.S. Government activity |
| S397-9D45 | 5/9 Secondary reference U.S. Government activity |
| ST3M747-9D45 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| 10116202 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5306-01-286-8472 is a Bolt,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-286-8472 has 11 manufacturer part numbers on file: ST3M747-9D45 (Huck International, Inc), MB155-9D45 (Hi-Shear Corporation), ST3M747-9D45 (Heartland Precision Fasteners Inc), AIC688-9D45 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), VCG0002-9D45 (Valley-Todeco, Inc. Dba Arconic Fastening Systems) and 6 more.
1 possible match (shared part number, not a government interchangeability claim): 7025-01-620-7106. Verify interchangeability with system specifications before substitution.
Key specifications for MB155-9D45: Head Height: 0.328 INCHES NOMINAL IN; Fastener Length: 3.521 INCHES MINIMUM AND 3.568 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.725 INCHES NOMINAL 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.