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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-440-1ZI
TRI-DENT® Locknuts - Type SL - Unified
All metal, locking thread nuts –  SL
SL-632-1ZI
TRI-DENT® Locknuts - Type SL - Unified
All metal, locking thread nuts –  SL
SL-832-1ZI
TRI-DENT® Locknuts - Type SL - Unified
All metal, locking thread nuts –  SL
SL-032-1ZI
TRI-DENT® Locknuts - Type SL - Unified
All metal, locking thread nuts –  SL
SL-0420-1ZI
TRI-DENT® Locknuts - Type SL - Unified
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 N/A .112-40 (#4-40) N/A .138-32 (#6-32) N/A .164-32 (#8-32) N/A .190-32 (#10-32) N/A .250-20 (1/4-20)
Thread Code N/A 440 N/A 632 N/A 832 N/A 032 N/A 0420
Shank Code N/A 1
A (Shank) Max. N/A 0.038 in a1385.jpg N/A 0.038 in a1385.jpg N/A 0.038 in a1385.jpg N/A 0.038 in a1385.jpg N/A .054 in a1385.jpg
Min. Sheet Thickness N/A .040 in N/A .040 in N/A .040 in N/A .040 in N/A .056 in
Hole Size in Sheet + .003 - .000 N/A .166 in N/A .1875 in N/A .213 in N/A .250 in N/A .344 in
C Max. N/A .165 in N/A .187 in N/A .212 in N/A .249 in N/A .343 in
E ± .010 N/A .250 in N/A .280 in N/A .310 in N/A .340 in N/A .440 in
T ± .010 N/A .070 in N/A .070 in N/A .090 in N/A .090 in N/A .170 in
Min. Dist. Hole C/L to Edge N/A .19 in N/A .22 in N/A .27 in N/A .28 in N/A .34 in
For Use in Sheet Hardness N/A HRB 80 / HB 150 or less
Thread Specification N/A Internal, ASME B1.1, 2B
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®)