#303084T

Diameter Thread Threads Length Grade Finish Weight
0.4375 (7/16) N/A 20 GR 5 Zinc Clear Trivalent 0.0300
Diameter 0.4375 (7/16)
Thread 20
Length
Grade GR 5
Finish Zinc Clear Trivalent
Weight 0.0300

  • GR 5
  • Carbon Steel


When you are looking for nuts that will provide a better wrench ability and prevent slippage, Hex Hi Nuts will get the job done. With a taller hexagonal face (twice as tall as Hex Nuts), it gives more surface to wrench in hard-to-reach socketed situations. These nuts can be found fastening a variety of applications, including suspensions in trucks and construction vehicles. Available in Grades 5 and 8 to prevent from rounding out.

Hex Hi Nut – Grade 5

  • Rockwell hardness of Rc 32 max
  • Proof Load Strength Coarse Thread (UNC):
  • 133,000 psi min (up to 1”)
  • 116,000 psi min (over 1”)
  • Proof Load Strength Fine Thread (UNC):
  • 120,000 psi min (up to 1”)
  • 105,000 psi min (over 1”)
  • Taller nut to provide easy-access wrenching
  • Prevents slippage or rounding out of the nut
  • Twice the height of the Hex Nut
  • Sizes range from 1/4” to 1 1/2”
  • Meets SAE J482 standards
  • Hex Hi Nut – Grade 8

  • Rockwell hardness of Rc 26/34
  • Proof Load Strength Coarse Thread (UNC):
  • 165,000 psi min
  • Proof Load Strength Fine Thread (UNF):
  • 150,000 psi min
  • Taller nut to provide easy-access wrenching
  • Prevents slippage or rounding out of the nut
  • Twice the height of the Hex Nut
  • Sizes range from 1/4” to 1 1/2”
  • Meets SAE J482 standards
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