#371044T

Diameter Thread Threads Length Grade Finish Weight
0.3125 (5/16) N/A 24 Grade 5 Zinc Clear Trivalent .012
Diameter 0.3125 (5/16)
Thread 24
Length
Grade Grade 5
Finish Zinc Clear Trivalent
Weight .012

  • Grade 5


Castle Nuts, or Slotted Nuts, resemble Hex Slotted Nuts; however, the tops of the their corners are machined off for better cotter pin fitting. The design prevents the nuts from loosening in rotating applications such as bearings and bushings. Earnest offers the nuts in Grades 2 and 5.

Castle Nut – Grade 2

  • Top of the nut’s corners are machined off for better cotter pin fit
  • Used in rotating applications
  • Sizes range from 1/4 to 2”
  • Meets ANSI B18.2.2 standards
  • Castle Nut – Grade 5

  • Top of the nut’s corners are machined off for better cotter pin fit
  • Used in rotating applications
  • Grade 5 for added strength and toughness
  • Sizes range from 1/4" to 2”
  • Meets ANSI B18.2.2 standards
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