The Bolt,close Tolerance, cataloged under National Stock Number 5306-00-974-6594, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 11 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-974-6594 |
| Primary Part Number | AIC220-5A22 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| Status | ACTIVE |
| Head Height | 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN |
| Fastener Length | 1.726 INCHES NOMINAL IN |
| Thread Length | 0.341 INCHES MINIMUM AND 0.361 INCHES MAXIMUM IN |
| Hardness Rating | 50.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.365 INCHES MINIMUM AND 1.385 INCHES MAXIMUM IN |
| Width Between Flats | 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN |
| Grip Diameter | 0.3108 INCHES MINIMUM AND 0.3117 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Thread Class | 3A A |
| Test Data Document | 26512-GB511B DRAWING (THIS IS THE BASIC GOVERNING DRAWING, SUCH AS A CONTRACTOR DRAWING, ORIGINAL EQUIPMENT MANUFACTURER DRAWING, ETC.; EXCLUDES ANY SPECIFICATION, STANDARD OR OTHER DOCUMENT THAT MAY BE REFERENCED IN A BASIC GOVERNING DRAWING) |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP H11 OVERALL |
| Thread Series Designator | UNF |
| 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 |
|---|---|
| VS2521F5-22 | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| AIC220-5A22 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| Reference | Meaning |
|---|---|
| C081-5-22 | 7/2 Vendor item drawing reference U.S. Government activity |
| GB511B5-22 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation |
| BM55132-5-22A | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| BM17020-5-22A | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| VS2521F5-22 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| AIC516B5-22 | C/1 Advisory reference — outside the item-of-supply concept Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| EWSB22-5A22 | 3/2 Design control — primary reference U.S. Government activity |
| EWSB22-5A22 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| VS2521F5-22 | 5/9 Secondary reference U.S. Government activity |
| 202-15520-5-22 | 7/2 Vendor item drawing reference U.S. Government activity |
| BM55132-5-22A | 5/9 Secondary reference U.S. Government activity |
NSN 5306-00-974-6594 is a Bolt,close Tolerance, manufactured by Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-974-6594 has 2 manufacturer part numbers on file: VS2521F5-22 (Fairchild Fasteners Europe - Vsd Gmbh), AIC220-5A22 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company).
Key specifications for AIC220-5A22: Head Height: 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN; Fastener Length: 1.726 INCHES NOMINAL IN; Thread Length: 0.341 INCHES MINIMUM AND 0.361 INCHES MAXIMUM IN; Hardness Rating: 50.0 ROCKWELL C MAXIMUM OVERALL. 16 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.