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Online literature contains the most current information available.
  • Meets torque requirements for IFI 100/107 Grade B (unified) and ANSI B18.16.1M (metric) locknuts.
  • Type H is for use in sheet hardness HRB 80 or less on the Rockwell “B” scale.
  • Type HNL are for use in sheet hardness HRB 60 or less on the Rockwell “B” scale.
Unit of Measure

Thread Size

N/A .375-16 (3/8-16)


N/A Non-Locking H

Thread Code

N/A 0616

A (Shank) Max.

N/A .058 in CL_H_HN_dimension.JPG

Min. Sheet Thickness

N/A .058 in

Hole Size in Sheet + 0.005 - 0.000

N/A .500 in

C Max.

N/A .499 in

E ± .010

N/A .650 in

T1 ± .005

N/A .300 in
Min. Dist. Hole C/L to Edge1 N/A .480 in

Thread Specification

N/A ANSI B1.1, 2B

Fastener Material

N/A Heat-Treated Carbon Steel

Material Finish

N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless

For Use in Sheet Hardness

N/A HRB 80 / HB 150 or less

CAD Supplier

N/A PennEngineering® (PEM®)
  • 1 To minimize sheet distortion and maximize product performance, use a centerline-to-edge value greater or equal to the value specified.