AC-024-1

Floating Self-Clinching Fasteners A4, AS, AC

AC-024-1

Floating Self-Clinching Fasteners A4, AS, AC

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 Code
24
Thread Size
#10-24
Thread Specification
2B, ANSI B1.1, Internal
Shank Code
1
Fastener Material
300 Series Stainless Steel
Fastener Materials – Nut
300 Series Stainless Steel
Fastener Materials – Retainer
300 Series Stainless Steel
Standard Finish – Retainer & Nut
Passivated and/or tested per ASTM A380
For Use in Sheet Hardness
HRB 70 / HB 125 or Less
Float
.015” minimum, in all directions from center, .030” total
Product Category
Floating Self-Clinching Fasteners A4, AS, AC
CAD Supplier
PennEngineering® (PEM®)
CADPartID
103680
Thread Type
Non-Locking
Brand
PEM
Fastener Characteristics
Floating
PEM Product Family
ALA
Product Type
Nuts
Technology Type
Self-Clinching
Unit (Metric/Unified)
Unified
A Shank Max
0.038in
E ± .015_in
0.47in
Hole Size in Sheet + .003 – .000_in
0.406in
Min. Dist. Hole C/L to Edge_in
0.36in
Min. Sheet Thickness_in
0.038in
C Max._in
0.405in
D Max._in
0.405in
T1 Max._in
0.17in

Resources

Installation & Performance Data

ala-ac-as-las-lac-unified
TYPE THREAD CODE SHANK CODE TEST SHEET MATERIAL INSTALLATION (lbs.) RETAINER PUSHOUT (lbs.) RETAINER TORQUE-OUT (in. lbs.)
AC, AS, LAS, LAC 024 1
AC, AS, LAS, LAC 024 2
AC, AS, LAS, LAC 024 1
AC, AS, LAS, LAC 024 2

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