• 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.
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Unit of Measure

Thread Size

.250-20 (1/4-20)

Type

Self-Locking HNL

Thread Code

0420

A (Shank) Max.

.058 in
CL_H_HN_dimension.JPG

Min. Sheet Thickness

.058 in

Hole Size in Sheet + 0.005 - 0.000

.344 in

C Max.

.343 in

E ± .010

.500 in

T2 ± .010

.189 in

Min. Dist. Hole C/L to Edge

.38 in

Thread Specification

IFI 100/107 Grade B

Fastener Material

Carbon Steel

Material Finish

Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless plus sealant/lubricant

For Use in Sheet Hardness

HRB 60 / HB 107 or Less

CAD Supplier

PennEngineering® (PEM®)