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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.

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Items	SL-440-1ZI TRI-DENT® Locknuts - Type SL - Unified Add To Cart Request Quote	SL-632-1ZI TRI-DENT® Locknuts - Type SL - Unified Add To Cart Request Quote	SL-832-1ZI TRI-DENT® Locknuts - Type SL - Unified Add To Cart Request Quote	SL-032-1ZI TRI-DENT® Locknuts - Type SL - Unified Add To Cart Request Quote	SL-0420-1ZI TRI-DENT® Locknuts - Type SL - Unified Add To Cart Request Quote
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 Code¹	N/A 1
A (Shank) Max.	N/A 0.038 in	N/A 0.038 in	N/A 0.038 in	N/A 0.038 in	N/A .054 in
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 Edge²	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®)
Inventory	N/A {0}	N/A {0}	N/A {0}	N/A {0}	N/A {0}
¹ Other shank and screw lengths available. ² To minimize sheet distortion and maximize product performance, use a centerline-to-edge value greater or equal to the value specified.