The Bolt,square Neck, cataloged under National Stock Number 5306-01-706-2793, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Grainger Div of W W Grainger Inc. Government technical data includes 10 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-01-706-2793 |
| Primary Part Number | 21A953 |
| Item Name | Bolt,square Neck |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Grainger Div of W W Grainger Inc |
| Status | ACTIVE |
| Head Height | 0.27 INCHES NOMINAL IN |
| Fastener Length | 6.0 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.50 INCHES IN |
| Thread Direction | RIGHT-HAND |
| Color | BLACK OVERALL |
| Minimum Tensile Strength | 120000 POUNDS PER SQUARE INCH LBS |
| Thread Quantity Per Inch | 13 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 1.094 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 |
|---|---|
| 21A953 PRIMARY | Grainger Div of W W Grainger Inc (USA) |
| Reference | Meaning |
|---|---|
| 5306PL2148699 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 5306-01-706-2793 is a Bolt,square Neck, manufactured by Grainger Div of W W Grainger Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-706-2793 has 1 manufacturer part number on file: 21A953 (Grainger Div of W W Grainger Inc).
Key specifications for 21A953: Head Height: 0.27 INCHES NOMINAL IN; Fastener Length: 6.0 INCHES NOMINAL IN; Nominal Thread Diameter: 0.50 INCHES IN; Thread Direction: RIGHT-HAND. 10 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.