Item # LA4-440-1MD, Floating self-clinching, locking thread fasteners LA4, LAC, LAS

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 retainermore

Unit of Measure

Specifications

Thread Size	N/A .112-40 (#4-40)
Thread Type	N/A Self-Locking
Thread Code	N/A 440
Shank Code	N/A 1
A (Shank) Max.	N/A 0.038 in
Min. Sheet Thickness¹	N/A .038 in
Hole Size in Sheet + .003 - .000	N/A .290 in
C Max.	N/A .289 in
D Max.	N/A .290 in
E ± .015	N/A .360 in
T1 Max.	N/A .130 in
T2 Max.	N/A .190 in
Min. Dist. Hole C/L to Edge	N/A .300 in
Float	N/A .015” minimum, in all directions from center, .030” total
Fastener Material	N/A 400 Series Stainless Steel
Fastener Materials - Retainer	N/A 400 Series Stainless Steel
Fastener Materials - Nut	N/A 300 Series Stainless Steel
Retainer Finish	N/A Passivated and/or tested per ASTM A380
Nut Finish	N/A Black Dry-film Lubricant
For Use in Sheet Hardness²	N/A HRB 88 / HB 183 or Less
Thread Specification	N/A Internal, ANSI B1.1, 2B
CAD Supplier	N/A 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.

Specifications

Thread Size

Thread Type

Thread Code

Shank Code

A (Shank) Max.

Hole Size in Sheet + .003 - .000

C Max.

D Max.

E ± .015

T1 Max.

T2 Max.

Min. Dist. Hole C/L to Edge

Float

Fastener Material

Fastener Materials - Retainer

Fastener Materials - Nut

Retainer Finish

Nut Finish

Thread Specification

CAD Supplier