The Bolt,square Neck, cataloged under National Stock Number 5306-01-690-5526, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Schutt Industries of Clintonville, Wis., Inc. Div Schutt Industries of Clintonville, Wi Inc.. Government technical data includes 7 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-690-5526 |
| Primary Part Number | 28326 |
| Item Name | Bolt,square Neck |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Schutt Industries of Clintonville, Wis., Inc. Div Schutt Industries of Clintonville, Wi Inc. |
| Status | ACTIVE |
| Fastener Length | 3.00 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.3125 INCHES IN |
| Head Style | OVAL |
| Thread Direction | RIGHT-HAND |
| Thread Quantity Per Inch | 18 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5306-01-690-5526 is a Bolt,square Neck, manufactured by Schutt Industries of Clintonville, Wis., Inc. Div Schutt Industries of Clintonville, Wi Inc., classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-690-5526 has 2 manufacturer part numbers on file: 28326 (Schutt Industries of Clintonville, Wis., Inc. Div Schutt Industries of Clintonville, Wi Inc.), 28326 (Fastenal Company Dba Fastenal Co).
Key specifications for 28326: Fastener Length: 3.00 INCHES NOMINAL IN; Nominal Thread Diameter: 0.3125 INCHES IN; Head Style: OVAL; Thread Direction: RIGHT-HAND. 7 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.