The Bolt,square Neck, cataloged under National Stock Number 5306-01-668-0718, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Oshkosh Defense Llc. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-668-0718 |
| Primary Part Number | 4253315 |
| Item Name | Bolt,square Neck |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Oshkosh Defense Llc |
| Status | ACTIVE |
| Neck Length | 0.290 INCHES NOMINAL IN |
| Head Height | 0.270 INCHES NOMINAL IN |
| Fastener Length | 8.000 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | ASTM F1941 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Material Document and Classification | SAE J429 INTERNATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | TRUSS |
| Thread Direction | RIGHT-HAND |
| Neck Width | 0.520 INCHES NOMINAL IN |
| Surface Treatment | ZINC OVERALL |
| Thread Quantity Per Inch | 13 |
| Material | STEEL OVERALL |
| Head Diameter | 1.090 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 |
|---|---|
| 4253315 PRIMARY | Oshkosh Defense Llc (USA) |
NSN 5306-01-668-0718 is a Bolt,square Neck, manufactured by Oshkosh Defense Llc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-668-0718 has 1 manufacturer part number on file: 4253315 (Oshkosh Defense Llc).
Key specifications for 4253315: Neck Length: 0.290 INCHES NOMINAL IN; Head Height: 0.270 INCHES NOMINAL IN; Fastener Length: 8.000 INCHES NOMINAL IN; Surface Treatment Document and Classification: ASTM F1941 ASSN STD SINGLE TREATMENT RESPONSE OVERALL. 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.