#321032

Diameter Thread Threads Length Grade Finish Weight
0.3125 (5/16) N/A 18 GR 2 Plain Finish .018
Diameter 0.3125 (5/16)
Thread 18
Length
Grade GR 2
Finish Plain Finish
Weight .018

  • GR 2
  • Carbon Steel


Square Nuts, or Regular Square Nuts, are widely used throughout the locomotive industry. Their square head design provides a wide bearing surface while maintaining a classic look. Earnest offers Square Nuts in Grades 2, 5, and 8 for durability and strength. Get modern strength with a classic look.

Square Nut – Grade 2

  • Aesthetically pleasing square head look
  • Widely used on trains and railroad applications
  • Sizes range from 1/4to 2”
  • Meets ANSI B18.2.2 standards
  • Square Nut – Grade 5

  • Aesthetically pleasing square head look
  • Widely used on trains and railroad applications
  • Sizes range from 1/4 to 2”
  • Meets ANSI B18.2.2 standards
  • Square Nut – Grade 8

  • Aesthetically pleasing square head look
  • Widely used on trains and railroad applications
  • Increased strength for extra durability and toughness while maintaining good ductility
  • Sizes range from 1/4 to 2”
  • Meets ANSI B18.2.2 standards
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