Self Clinching Standoffs

Series CFSO, CFSOS, CFBSO, CFBSOS

Series	Material	Finish
CFSO CFBSO	Heat-treated Carbon Steel	Zinc* Clear
CFSOS CFBSOS	Series 300 Stainless Steel	Passivated ASTM A380
*Spec, ASTM B633-85
Thread:	Class 2B, MIL-S-7742; (6H ISO metric)
Use In:	CFSO & CFBSO – Materials with Rockwell Hardness B-80 or less CFSOS & CFBSOS – Materials with Rockwell Hardness B-80 or less

CH studs provide a strong flush-head assembly in material as thin as 0.40in. (1.0mm) with high torq-out and push out performance.

 

Dimensions & Specifications
Thread size	Part Number	L Lengths + .05 – 13mm												+.08 -.00	A dim. +.00 -0.13	H hex dim. (n-m.)	C counter -bore dia.	min.	min.
		3	4	6	8	10	12	14	16	18	20	22	25
M 3	CFSO CFSOS CFBSO CFBSOS	-3	-4	-6	-8	-10	-12	-14	-16	-18				5.4	5.38	6.4	3.2	7.0	1.0
					-8	-10	-12	-14	-16	-18	-20	-22	-25
M 4	CFSO CFSOS CFBSO CFBSOS	-3	-4	-6	-8	-10	-12	-14	-16	-18	-20	-22		7.2	7.11	7.9	4.8	8.0	1.3
					-8	-10	-12	-14	-16	-18	-20	-22	-25
M 5	CFSO CFSOS CFBSO CFBSOS	-3	-4	-6	-8	-10	-12	-14	-16	-18	-20	-22		7.2	7.11	7.9	5.2	8.0	1.3
					-8	-10	-12	-14	-16	-18	-20	-22	-25
	T ± 0.4			3.2	4.0	4.0	5.0	6.5	6.5	9.5	9.5	9.5	9.5
	D ± 0.4	none				4.0	4.0	4.0	8.0	8.0	8.0	11.0	11.0

 

Installation & Performance Data
Thread Size	Standoff Material	Install (KN)	Pushout (N)	Torque-out (N-M)	Pull Through	Install (KN)	Pushout (N)	Torque-out (N-M)	Pull Through	Rec Tighten Torque Max. (N-M)
M3	Steel	4.7	700	1.2	1230	96	990	2.1	1450	0.5
	Stainless Steel	4.7	700	1.2	985	9.6	990	2.1	1150	0.4
3.5M3	Steel	7.4	1310	2.79	1350	14.5	1850	3.9	1670	0.5
	Stainless Steel	7.4	1310	2.79	1100	14.5	1850	3.9	1350	0.4
M4 M5	Steel	10.5	1750	5.01	2550	17.6	2460	8.45	3100	1.9, 3.4
	Stainless Steel	10.5	1750	5.01	2020	17.6	2460	8.45	2450	0.9, 2.7

 

Recommended Installation Procedure
Insert Standoff through hole in sheet into metal Apply only sufficient squeezing force between parallel surfaces of punch and anvil to embed hex head flush in sheet Avoid excessive pressure