Specifications
| Material | Mild steel |
| Grade | ASTM A307 |
| Standard | ASTM A36 |
| Diameters | 3/8" to 1" |
| Lengths | 1" to 6" |
| Thread | UNC / metric coarse |
| Finish | Plain (black) / Zinc-plated / Hot-dip galvanized |
Description
Machine Bolt — ASTM A307 bolt for structural, machinery and general fastening. Complete with nut and washer on request. Stocked across common diameters and lengths in plain (black) and other finishes.
The machine bolt is a general-purpose bolt with a machined thread and a hex or square head, used to fasten machinery, equipment and metal components together. Machine bolts are the everyday fasteners of mechanical assembly — mounting motors, joining frames, securing equipment to bases — and are available in a full range of sizes, grades and finishes to match the duty. They pair with a nut and, usually, washers to form a secure, removable joint.
Machine bolts are supplied across a wide range of diameters, lengths, grades and finishes with matching nuts. The right size, grade and coating depend on the load and environment. See the specifications below for available sizes.
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