Black Oxide Nuts Bolts & Screws

Collection by Little Anvil

Pins

•

3.74k

Followers

Little Anvil design, hand fabricate and source a collection of vintage industrial hardware for home and commercial use. We specialise in black oxide industrial nuts, carriage bolts, machine bolts, lag bolts, slotted screws, pyramid head screws, washers, square washers, mudguard washers, chain, s-hooks and anchors.

Bolt Machine Carriage Steel Black Oxide

Bolt Machine Square Head Steel Black Oxide

Bolt Lag Square Head Steel Black Oxide

Screw Wood Oval Countersunk Slotted Steel Black Oxide

Screw Wood Round Slotted Steel Black Oxide

Nut Square Steel Black Oxide

Dynabolt Blackened Head

Bolt Lag Square Head Steel Black Oxide | Etsy

In the 1830s, square-headed bolts were superseded by the hex head. The widespread use of hex head nuts and bolts came about due to innovation in engineering and metallurgy. Hex-head nuts and bolts and the tools to use them require close tolerances, whilst square heads required less accurate tolerances. Square-headed bolts and screws were commonly used in early applications. When machinists used cast iron and cruder forms of steel, square bolt heads were easier to make with the tools, metals…