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Type SL self-locking nuts are designed with a unique and economical TRI-DENT® locking feature, which meets demanding locking performance requirements.
  • 3 cycle locking performance. Achieved using steel socket head cap screws, 180 ksi / property class 12.9 with standard finish of thermal oxide and light oil.
  • Recommended for use in sheets HRB (Rockwell “B” scale) 80 or less and HB (Hardness Brinell) 150 or less.
All metal, locking thread nuts –  SL
TRI-DENT® Locknuts - Type SL 2
Unit of Measure
Items All metal, locking thread nuts –  SL
SL-M3-1ZI
TRI-DENT® Locknuts - Type SL - Metric
All metal, locking thread nuts –  SL
SL-M3.5-1ZI
TRI-DENT® Locknuts - Type SL - Metric
All metal, locking thread nuts –  SL
SL-M4-1ZI
TRI-DENT® Locknuts - Type SL - Metric
All metal, locking thread nuts –  SL
SL-M5-1ZI
TRI-DENT® Locknuts - Type SL - Metric
All metal, locking thread nuts –  SL
SL-M6-1ZI
TRI-DENT® Locknuts - Type SL - Metric
Description N/A Type SL self-locking nuts are designed with a unique and economical TRI-DENT® locking feature, which meets demanding locking performance requirements.
  • 3 cycle locking performance. Achieved using steel socket head cap screws, 180 ksi / property
Thread Size x Pitch N/A M3 x 0.5 N/A M3.5 x 0.6 N/A M4 x 0.7 N/A M5 x 0.8 N/A M6 x 1
Thread Code N/A M3 N/A M3.5 N/A M4 N/A M5 N/A M6
Shank Code N/A 1
A (Shank) Max. N/A 0.98 mm a1385.jpg N/A 0.98 mm a1385.jpg N/A 0.98 mm a1385.jpg N/A 0.98 mm a1385.jpg N/A 1.38 mm a1385.jpg
Min. Sheet Thickness N/A 1.0 mm N/A 1.0 mm N/A 1.0 mm N/A 1.0 mm N/A 1.4 mm
Hole Size in Sheet + 0.08 N/A 4.22 mm N/A 4.75 mm N/A 5.41 mm N/A 6.35 mm N/A 8.75 mm
C Max. N/A 4.2 mm N/A 4.73 mm N/A 5.38 mm N/A 6.33 mm N/A 8.73 mm
E ± 0.25 N/A 6.35 mm N/A 7.11 mm N/A 7.87 mm N/A 8.64 mm N/A 11.18 mm
T ± 0.25 N/A 1.5 mm N/A 1.5 mm N/A 2 mm N/A 2 mm N/A 4.08 mm
Min. Dist. Hole C/L to Edge N/A 4.8 mm N/A 5.6 mm N/A 6.9 mm N/A 7.1 mm N/A 8.6 mm
For Use in Sheet Hardness N/A HRB 80 / HB 150 or less
Thread Specification N/A Internal, ASME B1.13M, 6H
Fastener Material N/A Heat-Treated Carbon Steel
Standard Finish N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless
CAD Supplier N/A PennEngineering® (PEM®)