The Bolt,square Neck, cataloged under National Stock Number 5306-01-656-4826, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Mcmaster-Carr Supply Co. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-656-4826 |
| Primary Part Number | 93180A225 |
| Item Name | Bolt,square Neck |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Neck Length | 0.156 INCHES NOMINAL IN |
| Head Height | 0.145 INCHES NOMINAL IN |
| Fastener Length | 1.25 INCHES NOMINAL IN |
| Thread Length | 1.094 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.25 INCHES IN |
| Head Style | ROUND |
| Thread Direction | RIGHT-HAND |
| Neck Width | 0.26 INCHES NOMINAL IN |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP 316 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.594 INCHES NOMINAL 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 |
|---|---|
| 93180A225 PRIMARY | Mcmaster-Carr Supply Co (USA) |
| Reference | Meaning |
|---|---|
| ASME B18.5 | 3/1 Design control — primary reference The American Society of Mechanical Engineers |
NSN 5306-01-656-4826 is a Bolt,square Neck, manufactured by Mcmaster-Carr Supply Co, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-656-4826 has 1 manufacturer part number on file: 93180A225 (Mcmaster-Carr Supply Co).
Key specifications for 93180A225: Neck Length: 0.156 INCHES NOMINAL IN; Head Height: 0.145 INCHES NOMINAL IN; Fastener Length: 1.25 INCHES NOMINAL IN; Thread Length: 1.094 INCHES NOMINAL IN. 13 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.