#706148

Diameter Thread Threads Length Grade Finish Weight
0.3750 (3/8) Partial 16 2.2500 (2 1/4) 170M PSI Plain Finish 0.0819
Diameter 0.3750 (3/8)
Thread 16
Length 2.2500 (2 1/4)
Grade 170M PSI
Finish Plain Finish
Weight 0.0819

  • 170M PSI


You call them Ferry Cap Screws, Counterbore Screws, or Double Hex Screws. We call them 12 Point Flange Screws. Used in many industries, they’re used primarily in diesel motors. The 12 points on the head prevent the edges from rounding out better than the hex head. Earnest carries Grade E9, stronger than Grade 8, to withstand rough conditions. This also allows for the screws to be more securely fastened and used more than once.

12 Point Flange Screw – E9-170M

  • 12 point design prevents head from rounding out
  • Able to replace any application currently using a socket head cap screw
  • Tensile strength of 170,000 psi min exceeds Grade 8 strength levels
  • Proof load strength of 140,000 psi min
  • Rockwell hardness of Rc 38/42
  • Diameter sizes range from 1/4” to 1 1/4
  • Meets ANSI B18.2.1 standards
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