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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

Unit of Measure

Specifications

Thread Size	N/A .250-20 (1/4-20)
Thread Code	N/A 0420
Shank Code¹	N/A 2
A (Shank) Max.	N/A .087 in
Min. Sheet Thickness	N/A .091 in
Hole Size in Sheet + .003 - .000	N/A .344 in
C Max.	N/A .343 in
E ± .010	N/A .440 in
T ± .010	N/A .170 in
Min. Dist. Hole C/L to Edge²	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}

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.