The Bolt,square Neck, cataloged under National Stock Number 5306-00-282-0091, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is The American Society of Mechanical Engineers. Government technical data includes 17 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 | 5306-00-282-0091 |
| Primary Part Number | ASME B18.5 0.375-16X2 |
| Item Name | Bolt,square Neck |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The American Society of Mechanical Engineers |
| Status | ACTIVE |
| Neck Length | 0.281 INCHES NOMINAL IN |
| Head Height | 0.188 INCHES NOMINAL IN |
| Fastener Length | 2.000 INCHES NOMINAL IN |
| Thread Length | 0.750 INCHES MINIMUM IN |
| Material Document and Classification | FF-B-571 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Features Provided | SQUARE NUT |
| Head Style | BUTTON |
| Thread Direction | RIGHT-HAND |
| Nondefinitive Spec/std Data | C2 TYPE |
| Neck Width | 0.375 INCHES NOMINAL IN |
| Minimum Tensile Strength | 48000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 16 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.813 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 |
|---|---|
| ASME B18.5 0.375-16X2 PRIMARY | The American Society of Mechanical Engineers (USA) |
NSN 5306-00-282-0091 is a Bolt,square Neck, manufactured by The American Society of Mechanical Engineers, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-282-0091 has 1 manufacturer part number on file: ASME B18.5 0.375-16X2 (The American Society of Mechanical Engineers).
Key specifications for ASME B18.5 0.375-16X2: Neck Length: 0.281 INCHES NOMINAL IN; Head Height: 0.188 INCHES NOMINAL IN; Fastener Length: 2.000 INCHES NOMINAL IN; Thread Length: 0.750 INCHES MINIMUM IN. 17 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.