156734 - Miller 10-32 SEMS Nut with Cone Washer - 156734

Precision Fastening with Miller OEM Quality

The Miller 156734 Nut is a specialized fastening component designed to meet the rigorous standards of industrial welding equipment. This is not a standard hardware store fastener; it is a 10-32 SEMS nut featuring an integrated, captive cone washer. In the realm of industrial maintenance and repair operations (MRO), the specificity of fasteners plays a crucial role in the longevity and reliability of equipment. The "SEMS" designation indicates that the washer is pre-assembled onto the nut, free to rotate but permanently attached. This engineering choice is deliberate, ensuring that the correct washer is always present and oriented correctly during assembly.

Technically, this component features a 0.31-inch (approx. 5/16") hex head and a height of 0.13 inches. The thread pitch is a standard fine 10-32, commonly used in electronics and precision machinery for its high tensile stress area and resistance to loosening. The integrated cone washer (0.38-inch diameter) serves a vital mechanical function. Unlike a flat washer, a cone washer acts as a spring. When tightened, it flattens out, exerting a continuous axial load on the threads. This preload is essential in welding machines, which are subject to significant vibration from cooling fans and transformers, as well as thermal cycling from high-amperage operation. The spring action compensates for minute expansions and contractions, preventing the nut from backing off over time.

Material composition is equally important. This nut is manufactured from plated steel, providing necessary tensile strength while offering resistance to oxidation and corrosion. In the harsh environment of a fabrication shop, where humidity and fumes are present, plated fasteners ensure that maintenance points remain serviceable and do not seize due to rust. Using genuine Miller OEM parts like the 156734 ensures that the metallurgical properties and dimensional tolerances match the original engineering specifications of your machine, preserving its safety and performance ratings.