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All Categories > PEM® Brand Fasteners for Metal Sheets and Panels > Nuts for Sheet Metal > Floating Nuts – Types A4, AS, AC, LA4, LAC, LAS > Floating self-clinching fasteners A4, AS, AC > Floating Self-Clinching Fasteners A4, AS, AC - Unified > Part # A4-024-1  

Part # A4-024-1, Floating Self-Clinching Fasteners A4, AS, AC - Unified

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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  web site for a complete Military Specification and National Aerospace Standards Reference Guide (Bulletin NASM).




 Specifications   

Thread Size
.190-24 (#10-24)

Thread Type
Non-Locking

Thread Code
024

Shank Code
1

A (Shank) Max.

 View
0.038 in

Min. Sheet Thickness
.038 in

Hole Size in Sheet + .003 - .000
.406 in

C Max.
.405 in

D Max.
.405 in

E ± .015
.470 in

T1 Max.
.170 in

Min. Dist. Hole C/L to Edge
.360 in

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

Fastener Material
400 Series Stainless Steel

Fastener Materials - Retainer
400 Series Stainless Steel

Fastener Materials - Nut
300 Series Stainless Steel

Standard Finish - Retainer & Nut
Passivated and/or tested per ASTM A380

For Use in Sheet Hardness1
HRB 88 / HB 183 or Less

Thread Specification
Internal, ANSI B1.1, 2B

CAD Supplier
PennEngineering® (PEM®)
1 HRB - Hardness Rockwell “B” Scale. HB - Hardness Brinell.


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