Machine Screw Nuts

A machine screw nut is a six-sided or four-sided internally threaded fastener with flat tops and chamfered or unchamfered corners, depending on the style. Threads shall be Unified Standard, Class 2B. Designed to be used specifically with machine screws, with stainless steel used on stainless machine screws where parts are subject to corrosive conditions. Offered in 18-8 stainless steel (303 & 304 series) 316 stainless steel, and steel with many coatings and finishes on-hand. Available in coarse thread and fine thread and ready-to-ship in a variety of sizes. Browse our selection of machine screw nuts for your building projects and industrial applications.

Here at BW Industrial Sales, your satisfaction is our number one priority! If you have any questions about machine screw nuts or any other manufacturing parts and tooling, please please contact our experienced and qualified BW Industrial Sales staff; or call us at 626-358-1836 for an immediate response.
Request a quote on nuts specific to your application, or contact us for more information.  

Hex, Regular Pattern (Standard):  A six-sided, hexagonal-shaped, internally threaded fastener with flat tops and chamfered corners. The most commonly used machine screw nut because of its versatility.

Hex, Small Pattern: Similar in design to standard hex machine screw nuts but with smaller widths across the flats and across the corners. Designed to be used with machine screws in areas where there is limited space for wrenching.

Square Nut:  A four-sided, internally threaded fastener, tops and bottoms flat, without chamfer. Threads shall be Unified coarse thread, Class 2B. Offers a greater bearing surface for wrenching.
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