#3 Head Plow Bolts
The largest line-up of #3 Head Plow Bolts in the industry.

Slotted to allow
for easy cotter pin

Slotted Hex Nuts

Earnest Machine stocks #3 Head Plow Bolts in sizes ranging from 3/8” to 1 3/8” in diameter and from 1″ to 8″ in length, in Grade 5, 8, and 170M strength levels, in either a Flat, Domed, or Oversized head style. 

What's a #3 Head Plow Bolt?

Watch the video to learn more about the features and benefits of slotted hex nuts. 


#3 Domed Head Plow Bolts 

The #3 Domed Head Plow Bolt is designed with an added layer of steel on top of the fastener’s head. This thicker, domed head provides a greater amount of wear resistance and reduces the likelihood of bolt and blade breakage within your fastened assembly.

Deeper Depth of Square

The #3 Domed Head Plow Bolt also features a deeper depth of square, which provides fuller engagement in square holes and helps to lock the Plow Bolt in place while the nut is tightened during installation. 

#3 Flat Head Plow Bolts

The #3 Flat Head Plow Bolt, also known as a standard Plow Bolt, features a flat head design that provides a flush mount and zero clearance within countersunk holes. This style of fastener is a great choice for applications where a low-profile head is needed. 

#3 Oversized Head Plow Bolts

This style of Plow Bolt features a larger head size than what is standard for its thread size. #3 Oversized Head Plow Bolts provide a greater amount of wear resistance and are used in applications where the blade is manufactured to accept a larger head size than the hole drilled into the moldboard of the blade.

#3 Head Plow Bolt Applications

Snow Plow Assemblies
Earthmoving Equipment
Mining & Quarry Applications
Agriculture Equipment
Department of Transportation