The Bolt,shear, cataloged under National Stock Number 5306-00-414-7923, 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 19 specifications, cited from the U.S. Government catalog. The record lists 4 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-00-414-7923 |
| Primary Part Number | VS2521-3F5 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Head Height | 0.140 INCHES NOMINAL IN |
| Fastener Length | 1.158 INCHES MINIMUM AND 1.205 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | NAS 672 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.210 INCHES MINIMUM AND 0.277 INCHES MAXIMUM IN |
| Hardness Rating | 46.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | AMS6485 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 56878-EWSB22 MANUFACTURERS STANDARD |
| Grip Length | 0.928 INCHES MINIMUM AND 0.948 INCHES MAXIMUM IN |
| Width Between Flats | 0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN |
| Grip Diameter | 0.1885 INCHES MINIMUM AND 0.1894 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Minimum Tensile Strength | 220000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP H11 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 |
|---|---|
| VS2521-3F5 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| 202-15520-3-5 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 202-15520-3-5 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 202-15520-3-5 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| VS2521-3F5 | 5/9 Secondary reference U.S. Government activity |
| EWSB22-3A5 | 5/9 Secondary reference U.S. Government activity |
| EWSB22-3A5 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| 202-15520-3-5 | 5/2 Secondary reference U.S. Government activity |
| 202-15520-3-5 | 5/2 Secondary reference U.S. Government activity |
| AIC220-3A5 | 5/9 Secondary reference Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| BM55132-3A5 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| BM55132-3A5 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-00-414-7923 is a Bolt,shear, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-414-7923 has 4 manufacturer part numbers on file: VS2521-3F5 (Howmet Global Fastening Systems Inc), 202-15520-3-5 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), 202-15520-3-5 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), 202-15520-3-5 (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for VS2521-3F5: Head Height: 0.140 INCHES NOMINAL IN; Fastener Length: 1.158 INCHES MINIMUM AND 1.205 INCHES MAXIMUM IN; Surface Treatment Document and Classification: NAS 672 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.210 INCHES MINIMUM AND 0.277 INCHES MAXIMUM IN. 19 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.