S–0420–2ZI

S / SS / CLS / CLSS / SP Self-Clinching Nuts · Unified · PDF page 28 · PEM Fastener Catalogue

S / SS / CLS / CLSS / SP Self-Clinching Nuts · Unified · thread .250-20 (1/4-20)

Carbon steel nut, Zinc plated per ASTM B633, SC1 (5µm), Type III, Colorless.

Also written as S-0420-2ZI.

Part number breakdown

Segment	Code	Meaning
Type	`S`	Carbon steel nut
Thread	`0420`	Thread size .250-20 (1/4-20)
Shank	`2`	—
Finish	`ZI`	Zinc plated per ASTM B633, SC1 (5µm), Type III, Colorless

Dimension	Value
Thread Size	.250-20 (1/4-20)
Type (Fastener Material) › Carbon Steel	S (3)
Thread Code	0420
Shank Code	2
A (Shank) Max.	.087
Rec. Min. Sheet Thickness	.090
Hole Size In Sheet +.003 −.000	.344
C Max.	.343
E ±.010	.440
T ±.010	.170
Min. Dist. Hole ℄ To Edge	.34

(3) This thread size S nut, with a -2 shank code, can be installed without pre-punching a mounting hole in a separate operation.

Property	Value
Type	S
Threads	Internal ASME B1.1 2B/ASME B1.13M, 6H
Fastener Materials	Hardened Carbon Steel
Standard Finishes	Zinc Plated, per ASTM B633, SC1 (5µm), Type III, Colorless
Optional Finish	Zinc Plated per ASTM B633, SC1 (5µm), Type II, Yellow
For use in Sheet Hardness	HRB 80/ HB 150 or less

Type	Thread Code	Shank Code	Test Sheet Material	Installation (lbs.)	Pushout (lbs.)	Torque-out (in. lbs.)
S / CLS	0420	2	5052-H34 Aluminum	4000-7000	360	125
S / CLS	0420	2	Cold-rolled Steel	6000-8000	400	150

Source: S™/CLS™/CLSS™ Nuts · PDF page 36