The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-044-8530, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 16 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-044-8530 |
| Primary Part Number | MB61-5D41 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| Status | ACTIVE |
| Head Height | 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN |
| Fastener Length | 3.013 INCHES MINIMUM AND 3.060 INCHES MAXIMUM IN |
| Thread Length | 0.441 INCHES MINIMUM AND 0.508 INCHES MAXIMUM IN |
| Shank Unthreaded Hole Diameter | 0.076 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE IN |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 76301-ST3-453 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Grip Length | 2.552 INCHES MINIMUM AND 2.572 INCHES MAXIMUM IN |
| Width Between Flats | 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN |
| Grip Diameter | 0.3115 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN |
| 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 | 2.889 INCHES MINIMUM AND 2.946 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 |
|---|---|
| ST3M453-5D41 | Houston Precision Fasteners I Lp (USA) |
| MB61-5D41 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| BM17019-5D41 PRIMARY | Huck International, Inc (USA) |
| 11825-5D41 | Reid Products Inc. Dba Reid Products Inc (USA) |
| PBF1253-5D41 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| AIC753-5D41 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| SLB252-5D41 | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| VS3204-5D41 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| ST3M453-5D41 | M.s. Aerospace Inc. Dba Ms Aerospace Inc (USA) |
| FIT7047-5D41 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| S11-1060-5D41 PRIMARY | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| MB61-5D41 PRIMARY | Hi-Shear Corporation (USA) |
| HP5453-5D41 PRIMARY | Heartland Precision Fasteners Inc (USA) |
| VAL23029-5D41 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| WC453-5D41 | West Coast Aerospace, Inc. (USA) |
| GS1016-5D41 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| Reference | Meaning |
|---|---|
| KS3020-5D41 | 5/9 Secondary reference Kenaloy Products Inc Sub Masco Corp |
| 109453-5D41 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| BM17019-5D41 | 5/9 Secondary reference U.S. Government activity |
| ST3M453-5D41 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| 109453-5D41 | 3/2 Design control — primary reference U.S. Government activity |
| US3204-5D41 | 5/9 Secondary reference U.S. Government activity |
| S353-5D41 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-044-8530 is a Bolt,close Tolerance, manufactured by Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-044-8530 has 16 manufacturer part numbers on file: ST3M453-5D41 (Houston Precision Fasteners I Lp), MB61-5D41 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), BM17019-5D41 (Huck International, Inc), 11825-5D41 (Reid Products Inc. Dba Reid Products Inc), PBF1253-5D41 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners) and 11 more.
Key specifications for MB61-5D41: Head Height: 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN; Fastener Length: 3.013 INCHES MINIMUM AND 3.060 INCHES MAXIMUM IN; Thread Length: 0.441 INCHES MINIMUM AND 0.508 INCHES MAXIMUM IN; Shank Unthreaded Hole Diameter: 0.076 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE IN. 16 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.