The Bolt,close Tolerance, cataloged under National Stock Number 5306-00-321-2301, 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 15 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through both NSN and commercial part number lookups. 14 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-321-2301 |
| Primary Part Number | MB61-4D10 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| Status | ACTIVE |
| Head Height | 0.154 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN |
| Fastener Length | 1.006 INCHES MINIMUM AND 1.053 INCHES MAXIMUM IN |
| Thread Length | 0.371 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN |
| Shank Unthreaded Hole Diameter | 0.076 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN |
| Width Between Flats | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Grip Diameter | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 0.885 INCHES MINIMUM AND 0.942 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 |
|---|---|
| 11825-4D10 | Reid Products Inc. Dba Reid Products Inc (USA) |
| MB61-4D10 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HP5453-4D10 PRIMARY | Heartland Precision Fasteners Inc (USA) |
| MB61-4D10 PRIMARY | Hi-Shear Corporation (USA) |
| S11-1060-4D10 PRIMARY | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| PBF1253-4D10 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| GS1016-4D10 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| AIC753-4D10 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| VAL23029-4D10 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| 109453-4D10 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| FIT7047-4D10 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| Reference | Meaning |
|---|---|
| 109453-4D10 | 3/2 Design control — primary reference U.S. Government activity |
| ST3M453-4D10 | 5/2 Secondary reference U.S. Government activity |
| MA5453-4D10 | 5/9 Secondary reference Abounding Security Inc Div of Maa Corp |
| KS3020-4D10 | 5/9 Secondary reference Kenaloy Products Inc Sub Masco Corp |
| VS204-4D10 | 5/9 Secondary reference U.S. Government activity |
| ST3M453-4D10 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| S353-4D10 | 5/9 Secondary reference U.S. Government activity |
| BM17019-4D10 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| K53020-4D10 | 5/9 Secondary reference Kenaloy Products Inc Sub Masco Corp |
| VS3204-4D10 | 5/9 Secondary reference U.S. Government activity |
| BM17019-4D10 | 5/9 Secondary reference U.S. Government activity |
| US3204-4D10 | 5/9 Secondary reference U.S. Government activity |
| 109453-4D10 | 5/9 Secondary reference Sps Technologies Inc |
| VS3204-4D10 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
NSN 5306-00-321-2301 is a Bolt,close Tolerance, manufactured by Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-321-2301 has 11 manufacturer part numbers on file: 11825-4D10 (Reid Products Inc. Dba Reid Products Inc), MB61-4D10 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HP5453-4D10 (Heartland Precision Fasteners Inc), MB61-4D10 (Hi-Shear Corporation), S11-1060-4D10 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries) and 6 more.
Key specifications for MB61-4D10: Head Height: 0.154 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN; Fastener Length: 1.006 INCHES MINIMUM AND 1.053 INCHES MAXIMUM IN; Thread Length: 0.371 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN; Shank Unthreaded Hole Diameter: 0.076 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE IN. 15 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.