Self-Clinching & Weld Fasteners

Concealed Head Standoffs

Threaded standoffs fitted into a blind hole, hidden from the front.

Section: Self-clinching
Type: Standoffs

Overview

Concealed head standoffs install into a blind hole so they cannot be seen from the front of the panel. They give a threaded spacer for boards and components behind a clean cosmetic face.

Full dimensions, preferred lengths and installation / push-out / torque-out performance data are in the tables below, taken from the self-clinching fasteners catalogue.

Specifications

Part numbers	SG-CSOS, SG-CSS
Stainless Steel	SG-CSOS, SG-CSS
Sizes	M3, M4, M5, M6
Sheet hardness (SG-CSOS/CSS)	HRB 70 or less

Dimensions & performance data

All dimensions in mm unless stated. Values from the self-clinching fasteners catalogue. Install into sheet within the hardness limits shown in the specifications.

Dimensions (mm)

Thread	M3	M4	M5	M6
A	6.35	8.73	9.53	11.11
D	5.0	6.5	9.6	9.6
B	4.2	6.23	7.37	9.0
C	5.39	7.9	8.72	9.89
Blind mounting hole ±0.8	5.41	7.92	8.74	9.9
Min. distance to edge of sheet	4.8	6.4	7.2	9.5
Hole in mating part +0.08	5.41	7.92	8.73	9.9
Hole depth – SG-CSOS	1.91	1.91	1.91	1.91
Hole depth – SG-CSS	1.09	1.09	1.09	-
E min. depth of blind hole – SG-CSOS	1.83	1.83	1.83	1.83
E min. depth of blind hole – SG-CSS	1.04	1.04	1.04	-
Min. sheet thickness – SG-CSOS	2.4	2.4	2.4	2.4
Min. sheet thickness – SG-CSS	1.6	1.6	1.6	-

Preferred lengths L ±0.4 (mm)

Length L	M3	M4
4	•
6	•	•
8	•	•
10	•
12	•
16	•
20	•

Performance data: SG-CSOS / SG-CSS (stainless steel)

Thread	M3	M4	M5	M6
Installation (kN) – SG-CSS	17.8	21.3	24.5	-
Installation (kN) – SG-CSOS	19.2	23.6	26.7	28.9
Pushout (N) – SG-CSS	1330	1775	2000	-
Pushout (N) – SG-CSOS	1465	1955	2665	2860
Max. tightening torque (Nm) – SG-CSS	0.55	2.0	3.6	-
Max. tightening torque (Nm) – SG-CSOS	0.44	1.6	2.9	7.2