Part # SP-0420-1, Self-Clinching Nuts - Types S, SS, CLS, CLSS, SP

Type SP, PEM 300® nuts provide strong load-bearing threads in stainless steel sheets as thin as .030”.

Type SP is recommended for use in stainless steel sheets HRB (Rockwell "B" scale) 90 or less and HB (Hardness Brinell) 185 or less.

Unit of Measure

Specifications

Thread Size	N/A .250-20 (1/4-20)
Thread Code	N/A 0420
Shank Code	N/A 1
A (Shank) Max.	N/A .054 in
Rec. Min. Sheet Thickness¹	N/A .056 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 Hardness³	N/A HRB 90 / HB 185 or Less
Thread Specification	N/A Internal, ASME B1.1, 2B
Fastener Material	N/A Age Hardened A286 Stainless Steel
Standard Finish	N/A Passivated and/or tested per ASTM A380
CAD Supplier	N/A PennEngineering® (PEM®)

¹ For maximum performance, we recommend that you use the maximum shank length for your sheet thickness.
² To minimize sheet distortion and maximize product performance, use a centerline-to-edge value greater or equal to the value specified.
³ HRB - Hardness Rockwell “B” Scale. HB - Hardness Brinell.

Specifications

Thread Size

Thread Code

Shank Code

A (Shank) Max.

Hole Size in Sheet + .003 - .000

C Max.

E ± .010

T ± .010

Thread Specification

Fastener Material

Standard Finish

CAD Supplier