The Bolt,shear, cataloged under National Stock Number 5306-00-150-3595, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Government technical data includes 25 specifications, cited from the U.S. Government catalog. The record lists 8 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-150-3595 |
| Primary Part Number | VS2521-20FS36 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Head Height | 0.680 INCHES MINIMUM AND 0.700 INCHES MAXIMUM IN |
| Fastener Length | 3.609 INCHES MINIMUM AND 3.656 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TY2,CL3 FED SPEC ALL TREATMENT RESPONSES OVERALL |
| Thread Length | 1.349 INCHES MINIMUM AND 1.416 INCHES MAXIMUM IN |
| Hardness Rating | 46.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL |
| Shank Unthreaded Hole Diameter | 0.136 INCHES MINIMUM AND 0.146 INCHES MAXIMUM FIRST HOLE IN |
| Hole Configuration Style | HEXAGON FLATS |
| Material Document and Classification | SPS-M-107 FSCM 56878 MFR REF 1ST MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 1.250 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 26512-GB511B20D36 MANUFACTURERS STANDARD |
| Grip Length | 2.240 INCHES MINIMUM AND 2.260 INCHES MAXIMUM IN |
| Width Between Flats | 1.801 INCHES MINIMUM AND 1.814 INCHES MAXIMUM IN |
| Grip Diameter | 1.2475 INCHES MINIMUM AND 1.2490 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Minimum Tensile Strength | 220000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 12 |
| Material | STEEL OR STEEL COMP H11 OVERALL |
| Hole Quantity | 1 |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 3.439 INCHES MINIMUM AND 3.471 INCHES MAXIMUM FIRST HOLE IN |
| Hole Type | DRILLED |
| Hole Diameter | 0.035 INCHES NOMINAL 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 |
|---|---|
| GB511B20D36 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| GB511B20D36 | Hi-Shear Corporation (USA) |
| GB511B20D36 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| VS2521-20FS36 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| GB511B20D36 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| GB511B20D36 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| GB511B20D36 | Huck International, Inc (USA) |
| GB511B20D36 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| EWSB22-20-36 | 3/2 Design control — primary reference U.S. Government activity |
| GB511B20D36 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation |
| EWSB22-20-36 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| VS2521-20FS36 | 5/9 Secondary reference U.S. Government activity |
| VS2521-20FD36 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 5306-00-150-3595 is a Bolt,shear, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-150-3595 has 8 manufacturer part numbers on file: GB511B20D36 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), GB511B20D36 (Hi-Shear Corporation), GB511B20D36 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), VS2521-20FS36 (Howmet Global Fastening Systems Inc), GB511B20D36 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc) and 3 more.
Key specifications for VS2521-20FS36: Head Height: 0.680 INCHES MINIMUM AND 0.700 INCHES MAXIMUM IN; Fastener Length: 3.609 INCHES MINIMUM AND 3.656 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TY2,CL3 FED SPEC ALL TREATMENT RESPONSES OVERALL; Thread Length: 1.349 INCHES MINIMUM AND 1.416 INCHES MAXIMUM IN. 25 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.