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PEM® PEMFLEX® self-locking, self-clinching fasteners retain their repeated use and effective prevailing locking torque.
  • Shoulder provides increased performance.
  • Flexing action permits repeated use and effective locking torque.
  • Flange provides positive stop during installation.
The thread locking performance of Types LK, LKA, and LKS PEMHEX self-clinching fasteners (with MD finish) is equivalent to applicable NASM25027 specifications. The self-clinching feature is the same tried and proven designmore
Unit of Measure
Items
All metal, locking thread nuts – LK, LKA, LKS - Metric

PEMFLEX® Self-locking, Self-clinching Fasteners - Types LK, LKA, LKS - Metric

All metal, locking thread nuts – LK, LKA, LKS - Metric

PEMFLEX® Self-locking, Self-clinching Fasteners - Types LK, LKA, LKS - Metric

All metal, locking thread nuts – LK, LKA, LKS - Metric

PEMFLEX® Self-locking, Self-clinching Fasteners - Types LK, LKA, LKS - Metric

All metal, locking thread nuts – LK, LKA, LKS - Metric

PEMFLEX® Self-locking, Self-clinching Fasteners - Types LK, LKA, LKS - Metric

All metal, locking thread nuts – LK, LKA, LKS - Metric

PEMFLEX® Self-locking, Self-clinching Fasteners - Types LK, LKA, LKS - Metric
Thread Size x Pitch N/A M2.5 x 0.45 N/A M2.5 x 0.45 N/A M3 x 0.5 N/A M3 x 0.5 N/A M4 x 0.7
A (Shank) Max.
N/A 0.97 mm
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N/A 1.38 mm
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N/A 0.97 mm
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N/A 1.38 mm
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N/A 0.97 mm
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Min. Sheet Thickness N/A 1.0 mm N/A 1.4 mm N/A 1.0 mm N/A 1.4 mm N/A 1.0 mm
Hole Size in Sheet + 0.08 N/A 4.37 mm N/A 4.37 mm N/A 4.75 mm N/A 4.75 mm N/A 6.76 mm
C Max. N/A 4.35 mm N/A 4.35 mm N/A 4.73 mm N/A 4.73 mm N/A 6.73 mm
D Max. N/A 4.45 mm N/A 4.45 mm N/A 4.85 mm N/A 4.85 mm N/A 6.2 mm
E Nom. N/A 6.35 mm N/A 6.35 mm N/A 6.35 mm N/A 6.35 mm N/A 8.73 mm
T ± 0.25 N/A 3.43 mm N/A 3.43 mm N/A 3.43 mm N/A 3.43 mm N/A 4.45 mm
Min. Dist. Hole C/L to Edge N/A 3.9 mm N/A 3.9 mm N/A 4 mm N/A 4 mm N/A 5.20 mm
For Use in Sheet Hardness1 N/A HRB 70 / HB 125 or Less
Thread Specification N/A Internal, ANSI/ASME B1.13M, 6H
Fastener Material N/A Carbon Steel
Standard Finish N/A Black, Dry-film Lubricant over Zinc Phosphate
Anvil Dia. N/A 13.00 mm
Anvil Depth N/A 5.50 mm
Breaker Corner N/A 0.13 mm
Punch Dia. N/A 13.00 mm
CAD Supplier N/A PennEngineering® (PEM®)
  • 1 HRB - Hardness Rockwell “B” Scale. HB - Hardness Brinell.