The Bolt,shear, cataloged under National Stock Number 5306-00-948-0648, 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 14 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-00-948-0648 |
| Primary Part Number | VS2521-7F19 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Head Height | 0.257 INCHES NOMINAL IN |
| Fastener Length | 1.654 INCHES NOMINAL IN |
| Thread Length | 0.466 INCHES MINIMUM IN |
| Nominal Thread Diameter | 0.438 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.188 INCHES NOMINAL IN |
| Width Between Flats | 0.678 INCHES MINIMUM AND 0.689 INCHES MAXIMUM IN |
| Grip Diameter | 0.4358 INCHES MINIMUM AND 0.4367 INCHES MAXIMUM IN |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL 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 |
|---|---|
| VS2521-7F19 | Howmet Global Fastening Systems Inc (USA) |
| AIC220-7A19 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| C081-7-19 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| EWSB22D7A19 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| GB11B7-19 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation |
| EWSB22D7A19 | 3/2 Design control — primary reference U.S. Government activity |
| C081-7-19 | 7/2 Vendor item drawing reference U.S. Government activity |
| EWSB22-7A19 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| VS2521-7F19 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-00-948-0648 is a Bolt,shear, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-948-0648 has 3 manufacturer part numbers on file: VS2521-7F19 (Howmet Global Fastening Systems Inc), AIC220-7A19 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), C081-7-19 (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for VS2521-7F19: Head Height: 0.257 INCHES NOMINAL IN; Fastener Length: 1.654 INCHES NOMINAL IN; Thread Length: 0.466 INCHES MINIMUM IN; Nominal Thread Diameter: 0.438 INCHES IN. 14 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.