The Bolt,square Neck, cataloged under National Stock Number 5306-00-424-0488, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 15 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 | 5306-00-424-0488 |
| Primary Part Number | 8B9519 |
| Item Name | Bolt,square Neck |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Neck Length | 0.125 INCHES NOMINAL IN |
| Head Height | 0.094 INCHES NOMINAL IN |
| Fastener Length | 0.781 INCHES NOMINAL IN |
| Thread Length | 0.500 INCHES MINIMUM IN |
| Hardness Rating | 30.0 ROCKWELL C NOMINAL OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | OVAL |
| Thread Direction | RIGHT-HAND |
| Neck Width | 0.312 INCHES NOMINAL IN |
| Minimum Yield Strength | 145000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNF |
| Head Diameter | 0.562 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 |
|---|---|
| 8B9519 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
NSN 5306-00-424-0488 is a Bolt,square Neck, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-424-0488 has 1 manufacturer part number on file: 8B9519 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 8B9519: Neck Length: 0.125 INCHES NOMINAL IN; Head Height: 0.094 INCHES NOMINAL IN; Fastener Length: 0.781 INCHES NOMINAL IN; Thread Length: 0.500 INCHES MINIMUM IN. 15 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.