The Bolt,shear, cataloged under National Stock Number 5306-00-211-8107, 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 20 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-211-8107 |
| Primary Part Number | VS2521-12F25S |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Head Height | 0.390 INCHES MINIMUM AND 0.410 INCHES MAXIMUM IN |
| Fastener Length | 2.398 INCHES MINIMUM AND 2.445 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | NAS 672 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.826 INCHES MINIMUM AND 0.893 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 |
| Material Document and Classification | AMS 6485 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 6487 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.750 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.552 INCHES MINIMUM AND 1.572 INCHES MAXIMUM IN |
| Width Between Flats | 1.052 INCHES MINIMUM AND 1.064 INCHES MAXIMUM IN |
| Grip Diameter | 0.7480 INCHES MINIMUM AND 0.7490 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Minimum Tensile Strength | 220000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 16 |
| Material | STEEL COMP H11 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 2.270 INCHES MINIMUM AND 2.302 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 |
|---|---|
| VS2521-12F25S PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| GB511GG12D25A | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| AIC516B12D25 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| GB511GG12D25A | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| GB511GG12D25A | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| EWSB22D12-25 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| GB511B12D25 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation |
| VS2521-12F25S | 5/9 Secondary reference U.S. Government activity |
| EWSB22D12-25 | 3/2 Design control — primary reference U.S. Government activity |
| H401-12D25 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-00-211-8107 is a Bolt,shear, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-211-8107 has 5 manufacturer part numbers on file: VS2521-12F25S (Howmet Global Fastening Systems Inc), GB511GG12D25A (Valley-Todeco, Inc. Dba Arconic Fastening Systems), AIC516B12D25 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), GB511GG12D25A (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), GB511GG12D25A (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for VS2521-12F25S: Head Height: 0.390 INCHES MINIMUM AND 0.410 INCHES MAXIMUM IN; Fastener Length: 2.398 INCHES MINIMUM AND 2.445 INCHES MAXIMUM IN; Surface Treatment Document and Classification: NAS 672 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.826 INCHES MINIMUM AND 0.893 INCHES MAXIMUM IN. 20 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.