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Class Code Information
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Bolt or Nut Mfg.Description
Code 3132 applies to employers engaged in manufacturing nuts, bolts, and spikes from bar or rod stock. Iron, steel, copper, and bronze bar or rod stock is received from others. Automatic machinery such as forging machines, shears, cold presses, bending chucks, blanking presses, tapping and threading machines are used in the manufacturing process. Usually, the products are pressed formed, either hot or cold.
Bar stock is usually fed into an automatic screw machine to be shaped. After being shaped, the nuts and bolts have a pattern etched into them using a milling machine. Completion operations include threading, cleaning and preparing items for plating. Plating is done with a chrome or cadmium finish if performed by the employer.
Assignment by Analogy
• Anchors – building type bolt
• Shackles – including forging
• Turnbuckles – including forging
• U-bolts
Operations to be Separately Rated
Blast furnace operations involving smelting, sintering or refining metals other than lead or iron. Refer to Code 1438 “Smelting, Sintering or Refining – NOC – Metals – Not Iron or Lead & Drivers.”
Rolling mill – brass, copper or other soft metals. Refer to Code 3027 “Rolling Mill – NOC & Drivers.”
Rolling mill – iron or steel – cold rolling, drawing or doubling process. No Steel making. Refer to Code 3018 “Iron or Steel Mfg. – Rolling Mill & Drivers.”