Locking and Non-locking Threads
These fasteners provide load-bearing threads in thin sheets and permit up to .030” adjustment for mating  hole misalignment.

The self-clinching feature offers fast and simple assembly. The fasteners are squeezed into prepared holes using  any standard press. The sheet remains flush on one side, and the fastener is permanently locked in place.

Extra strength and support in assembly is obtained by the threads of the floating nut extending fully into the  retainer shank (a unique PEM feature). A self-locking version of the fastener is also offered. Thread locking torque  performance is equivalent to applicable NASM25027 specifications.

Non-locking Type A4 and self-locking Type LA4 fasteners provide load-bearing threads in stainless steel sheets  as thin as .038” with hardness up to HRB 88 on the Rockwell “B” scale.

Many PEM Type AS and AC self-clinching floating fasteners correspond to sizes in US NASM45938/11 specifications. Check our&more
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Unit of Measure

Thread Size

.138-32 (#6-32)

Thread Type

Non-Locking
a1369.jpg

Thread Code

632

Shank Code

1

A (Shank) Max.

0.038 in
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Min. Sheet Thickness1 .038 in

Hole Size in Sheet + .003 - .000

.328 in

C Max.

.327 in

D Max.

.335 in

E ± .015

.390 in

T1 Max.

.130 in

Min. Dist. Hole C/L to Edge

.320 in

Float

.015” minimum, in all directions from center, .030” total

Fastener Material

Steel

Fastener Materials - Retainer

Heat-Treated Carbon Steel

Fastener Materials - Nut

Carbon Steel

Standard Finish - Retainer & Nut

Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless
For Use in Sheet Hardness2 HRB 70 / HB 125 or Less

Thread Specification

Internal, ANSI B1.1, 2B

CAD Supplier

PennEngineering® (PEM®)
  • 1 For maximum performance, we recommend that you use the maximum shank length for your sheet thickness.
  • 2 HRB - Hardness Rockwell “B” Scale. HB - Hardness Brinell.