The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-441-8209, 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 13 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-441-8209 |
| Primary Part Number | MB61-5D26 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Head Height | 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN |
| Fastener Length | 2.063 INCHES MINIMUM AND 2.110 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.467 INCHES NOMINAL IN |
| Shank Unthreaded Hole Diameter | 0.076 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.3125 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.602 INCHES MINIMUM AND 1.622 INCHES MAXIMUM IN |
| Width Between Flats | 0.502 INCHES NOMINAL IN |
| Grip Diameter | 0.3115 INCHES MINIMUM AND 0.3120 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 | 1.949 INCHES MINIMUM AND 1.986 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 |
|---|---|
| MB61-5D26 PRIMARY | Hi-Shear Corporation (USA) |
| 11825-5D26 | Reid Products Inc. Dba Reid Products Inc (USA) |
| HP5453-5D26 PRIMARY | Heartland Precision Fasteners Inc (USA) |
| AIC753-5D26 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| GS1016-5D26 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| S11-1060-5D26 PRIMARY | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| BM17019-5D26 PRIMARY | Huck International, Inc (USA) |
| VAL23029-5D26 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| FIT7047-5D26 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| MB61-5D26 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| PBF1253-5D26 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 109453-5D26 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| VS3204-5D26 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| 109453-5D26 | 5/9 Secondary reference Sps Technologies Inc |
| VS3204-5D26 | 5/9 Secondary reference U.S. Government activity |
| BM17019-5D26 | 5/9 Secondary reference U.S. Government activity |
| ST3M453-5D26 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| 109453-5D26 | 3/2 Design control — primary reference U.S. Government activity |
| KS3030-5D26 | 5/9 Secondary reference Kenaloy Products Inc Sub Masco Corp |
NSN 5306-01-441-8209 is a Bolt,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-441-8209 has 13 manufacturer part numbers on file: MB61-5D26 (Hi-Shear Corporation), 11825-5D26 (Reid Products Inc. Dba Reid Products Inc), HP5453-5D26 (Heartland Precision Fasteners Inc), AIC753-5D26 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), GS1016-5D26 (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace) and 8 more.
Key specifications for MB61-5D26: Head Height: 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN; Fastener Length: 2.063 INCHES MINIMUM AND 2.110 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.467 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.