The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-044-6562, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba PB Fasteners. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-044-6562 |
| Primary Part Number | GB511BY3M1 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES GRIP |
| Surface Finish | 63.0 MICROINCHES BEARING SURFACE OF HEAD |
| Surface Finish | 63.0 MICROINCHES THREADS |
| Head Height | 0.110 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN |
| Fastener Length | 0.385 INCHES MINIMUM AND 0.415 INCHES MAXIMUM IN |
| Thread Length | 0.313 INCHES MINIMUM AND 0.363 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 26512-GB511BY PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Grip Length | 0.052 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN |
| Width Between Flats | 0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN |
| Grip Diameter | 0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | TITANIUM ALLOY UNS R54520 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 |
|---|---|
| GB511BY3M1 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| GB511BY3M1 PRIMARY | Huck International, Inc (USA) |
| GB511BY3M1 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| GB511BY3M1 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| GB511BY3M1 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| Reference | Meaning |
|---|---|
| GB511BY3M1 | 3/2 Design control — primary reference U.S. Government activity |
| BM15016-3-1A | 5/9 Secondary reference U.S. Government activity |
| 110185-3-1M | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| VEH160271-3M-1 | 5/9 Secondary reference Valley-Todeco, Inc. Dba Arconic Fastening Systems |
| 110185-3-1M | 5/9 Secondary reference U.S. Government activity |
| BM15016-3-1A | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| VS3117-3-1 | 5/9 Secondary reference U.S. Government activity |
| GB511BY3M1 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation |
NSN 5306-01-044-6562 is a Bolt,close Tolerance, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-044-6562 has 5 manufacturer part numbers on file: GB511BY3M1 (Sps Technologies, Llc Dba PB Fasteners), GB511BY3M1 (Huck International, Inc), GB511BY3M1 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), GB511BY3M1 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), GB511BY3M1 (Valley-Todeco, Inc. Dba Arconic Fastening Systems).
Key specifications for GB511BY3M1: Surface Finish: 63.0 MICROINCHES GRIP; Surface Finish: 63.0 MICROINCHES BEARING SURFACE OF HEAD; Surface Finish: 63.0 MICROINCHES THREADS; Head Height: 0.110 INCHES MINIMUM AND 0.125 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.