The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-254-7269, 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 18 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through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-254-7269 |
| Primary Part Number | MB155-3D7 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Head Height | 0.140 INCHES MINIMUM IN |
| Fastener Length | 0.753 INCHES MINIMUM AND 0.800 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.305 INCHES MINIMUM AND 0.372 INCHES MAXIMUM IN |
| Material Document and Classification | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Features Provided | FINISHED HEAD |
| Head Style | SPLINE DRIVE SHEAR HEAD |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN |
| Head Minor Diameter | 0.383 INCHES MINIMUM AND 0.389 INCHES MAXIMUM IN |
| Grip Diameter | 0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP XM-13 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 |
|---|---|
| GS1031-3D7 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| MB155-3D7 PRIMARY | Hi-Shear Corporation (USA) |
| PBF1266-3D7 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M747-3D7 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M747-3D7 | Reid Products Inc. Dba Reid Products Inc (USA) |
| ST3M747-3D7 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HP7747-3D7 PRIMARY | Heartland Precision Fasteners Inc (USA) |
| ST3M747-3D7 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M747-3D7 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| VS3191-3D7 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| ST3M747-3D7 | Houston Precision Fasteners I Lp (USA) |
| VCG0002-3D7 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M747-3D7 | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| S397-3D7 PRIMARY | Huck International, Inc (USA) |
| ST3M747-3D7 | Hi-Shear Corporation (USA) |
| AIC688-3D7 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 122896-3D7 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M747-3D7 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| Reference | Meaning |
|---|---|
| ST3M747-3D7 | 5/9 Secondary reference Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| ST3M747-3D7 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| MB155-3D7 | 5/9 Secondary reference Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| 122896-3D7 | 3/2 Design control — primary reference U.S. Government activity |
| ST3M747-3D7 | 5/2 Secondary reference U.S. Government activity |
| ST3M747-3D7 | 5/9 Secondary reference U.S. Government activity |
| 10116177 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| S397-3D7 | 5/9 Secondary reference U.S. Government activity |
| VS3191-3D7 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-254-7269 is a Bolt,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-254-7269 has 18 manufacturer part numbers on file: GS1031-3D7 (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace), MB155-3D7 (Hi-Shear Corporation), PBF1266-3D7 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), ST3M747-3D7 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), ST3M747-3D7 (Reid Products Inc. Dba Reid Products Inc) and 13 more.
Key specifications for MB155-3D7: Head Height: 0.140 INCHES MINIMUM IN; Fastener Length: 0.753 INCHES MINIMUM AND 0.800 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.305 INCHES MINIMUM AND 0.372 INCHES MAXIMUM 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.