Self-Clinching & Weld Fasteners

Through Standoffs

Threaded spacers open at both ends.

Section: Self-clinching
Type: Standoffs

Overview

Through-threaded standoffs press into thin sheet and give a threaded spacer that a screw can enter from either side. The standard choice for mounting PCBs and panels at a set height.

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-SO, SG-SOS, SG-SO4, SG-SOA
Zinc Plated Steel	SG-SO
Stainless Steel	SG-SOS
400 Series Stainless Steel	SG-SO4
Aluminium	SG-SOA
Sizes	M2, M2.5, M3, M3.5, M4, M5
Sheet hardness (SG-SO)	HRB 80 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	M2, M2.5, M3	M3 alt	M4	M5
C ±0.13	4.2	5.39	7.12	7.12
D counterbore diameter ±0.13	3.2	3.2	4.8	5.35
A nom.	4.8	6.4	7.9	7.9
Min. sheet thickness	1.0	1.0	1.27	1.27
Recommended hole size +0.08	4.22	5.41	7.14	7.14
Min. distance to edge of sheet	6.0	6.8	8.0	8.0

Lengths L (+0.05/-0.13) and minimum thread depth B (mm)

Length L	3	4	5	6	7	8	10	12	14	15	16	18	20	22	25
Thread depth B min.	N/A						4				8			11

Performance data: SG-SO / SG-SOS (test sheet: steel, 1.5 mm)

Thread	M2, M2.5, M3	M3 alt	M3.5, M4	M5
Installation (kN)	9.9	14.8	17.9	17.9
Torsional resistance (Nm)	2.16	3.95	8.5	8.5
Pushout (N)	1050	1870	2500	2500
Pull-through (N) – steel	1470	1470	3180	3180
Pull-through (N) – stainless	1180	1180	2490	2490