About Machine Bolts
Machine Bolts are heavy-duty fasteners featuring regular hex or square heads with externally threaded bodies, designed for use with a nut or a pre-tapped hole. While most commonly recognized by their hex head profile, machine bolts are available in various head styles to provide effective wrenching capabilities for high-torque bolting applications.
Our machine bolt dimensions are engineered to meet both Metric and Imperial standards, featuring thread profiles such as Unified National Coarse (UNC), Fine Pitch (UNF), Fixed Pitch (UN), and ISO Metric. We manufacture these fasteners across all major material categories and ASTM specifications to suit industrial, construction, and automotive needs.
Machine Bolts Properties
| Property | Details |
|---|---|
| Manufacturing | Hot Forged / Cold Forged |
| Metric Size | M3 to M72 |
| Imperial Size | 1/4” to 3” |
| Threads | Metric, UNC, UNF, BSW |
| Form | Fully Threaded / Partially Threaded |
| Standards | ASTM, ASME, DIN, ISO, BS, IS |
| Sub Types | As per product category |
Machine Bolts Standards
| Standard | Size Range |
|---|---|
| ASME B18.2.1 / B18.2.2 | 1/4” to 3” |
| ASTM A194 / A193 | M6 to M72 |
| DIN 934 / DIN 6914 | M6 to M72 |
| ISO 4032 / ISO 7412 | M6 to M72 |
| BS 1769 | 1/4” to 2” |
| IS 1363 | M6 to M72 |
Machine Bolts Specifications
Looking to Buy Machine Bolts?
Check Nuts Weight Chart and Bolts Weight Chart to estimate quantities accurately for your project.
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