172684 - Miller 5/16-18 Hex Nut with Cone Washer (SEMS)

Miller 172684 Nut, .312-18 Hex with Cone Washer

Keep your Miller welding equipment running at peak performance with the authentic Miller 172684 Nut. This essential replacement part is engineered to meet the exact standards of Miller Electric, ensuring a perfect fit and reliable function for your machine. When it comes to repairing industrial equipment, every bolt and nut matters. This specific fastener is a 5/16-18 thread (listed as .312-18) hex nut, featuring a 1/2-inch (.50) hex drive for easy tightening and removal.

What sets this nut apart is its integrated cone washer. Known as a SEMS nut, this design permanently attaches the washer to the nut, ensuring that the washer is never lost during maintenance and is always positioned correctly. The cone washer provides a spring-like tension that helps lock the nut in place, effectively counteracting the vibrations generated by transformers, fans, and wire drive motors found in welding power sources. The washer has an outer diameter of 0.76 inches, providing a broad surface area to distribute the load and protect the underlying surface from damage.

Durability is key in welding environments. The Miller 172684 is made from durable steel and finished with a protective plating. This plating shields the metal from oxidation and corrosion, extending the life of the fastener and the assembly it secures. Using non-OEM hardware can lead to premature loosening or corrosion issues that might cause machine downtime or electrical faults. By choosing the genuine Miller 172684, you are investing in the longevity and safety of your equipment.

This item is sold individually. We recommend checking your welder's serial number and parts manual to confirm compatibility before ordering. Whether you are replacing a lost nut during a repair or stocking up on spare parts for your maintenance crib, the Miller 172684 is the reliable choice for professional welders and technicians.