A4-M4-1

Floating Self-Clinching Fasteners A4, AS, AC

A4-M4-1

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 0.76mm 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 0.97mm 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
M4
Thread Size
M4 x 0.7
Thread Specification
6H, ANSI/ASME B1.13M, Internal
Shank Code
1
Fastener Material
400 Series Stainless Steel
Fastener Materials – Nut
300 Series Stainless Steel
Fastener Materials – Retainer
400 Series Stainless Steel
Standard Finish – Retainer & Nut
Passivated and/or tested per ASTM A380
For Use in Sheet Hardness
HRB 88 / HB 183 or Less
Float
0.38mm minimum, in all directions from center, 0.76mm total
Product Category
Floating nuts, non locking – Type A4
CAD Supplier
PennEngineering® (PEM®)
CADPartID
103681
Thread Type
Non-Locking
Application Type
Industrial, Manufacturing & Sheet Metal Fabrication
Base Panel Material
Stainless Steel
Brand
PEM
Fastener Characteristics
Floating, Non-Locking
Industry
Industrial & Commercial
Installation Equipment/Method
C-Frame Automatic Feed, C-Frame Manual Feed
PEM Product Family
ALA, SS
Product Type
Nuts
Technology Type
Self-Clinching
Unit (Metric/Unified)
Metric
A Shank Max
0.97mm
E ± 0.38_mm
11.18mm
Hole Size in Sheet + 0.08_mm
9.35mm
Min. Dist. Hole C/L to Edge_mm
8.64mm
Min. Sheet Thickness_mm
0.97mm
C Max._mm
9.33mm
D Max._mm
9.28mm
T1 Max._mm
3.31mm

Resources

Installation & Performance Data

ala-a4-la4-metric
TYPE THREAD CODE TEST SHEET MATERIAL INSTALLATION (kN) RETAINER PUSHOUT (N) RETAINER TORQUE-OUT (N•m)
A4, LA4 M4 300 Series Stainless Steel 53 890 9.6
ss-a4-la4-nuts-metric
TYPE THREAD CODE TEST SHEET MATERIAL INSTALLATION (kN) RETAINER PUSHOUT (N) RETAINER TORQUE-OUT (N•m)
A4, LA4 M4 300 Series Stainless Steel 53 890 9.6

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