#291210

Diameter Thread Threads Length Grade Finish Weight
1 (1) Partial 12 4 (4) Grade 5 Plain Finish 1.1817
Diameter 1 (1)
Thread 12
Length 4 (4)
Grade Grade 5
Finish Plain Finish
Weight 1.1817

  • Grade 5


Square Head Bolts have been a staple in the locomotive industry for generations. In addition to aesthetic appeal, the square head provides a wider surface area to distribute clamping loads. Earnest provides bolts in Grades 5 and 8 for durability and strength. Get modern strength with a classic look.

Square Head Bolt – Grade 5

  • Aesthetically pleasing square head look
  • Largely used on trains and railroad applications
  • Diameter sizes range from 5/16 to 3/4
  • Meets ANSI B18.2.1 standards
  • Square Head Bolt – Grade 8

  • Aesthetically pleasing square head look
  • Largely used in the locomotive industry
  • Increased strength for extra durability and toughness while maintaining good ductility
  • Diameter sizes range from 3/8 to 1 1/2
  • Meets ANSI B18.2.1 standards
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