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These standoffs, which use the proven self-clinching design, install with a squeeze in properly sized round holes - and become permanently mounted in the thin sheet.

Types BSO4 standoffs are for installation into stainless steel sheets as thin as 1.02mm.

If you require a standoff which we do not offer in this bulletin, please contact us. We will be happy to work with you to satisfy your special need.
Unit of Measure

Thread Size x Pitch

 N/A M3 x 0.5

Thread Code

 N/A M3

Length Code

 N/A 20

Material Code

 N/A 4

Min. Sheet Thickness

 N/A 1 mm

Hole Size in Sheet + 0.08

 N/A 4.22 mm

C - 0.13

 N/A 4.2 mm a1353_1.jpg

F Min.

 N/A 9.50 mm

H Nom.

 N/A 4.8 mm
L - Length + 0.05 –0.131 N/A 20 mm
Min. Dist. Hole C/L to Edge2 N/A 6 mm
For Use in Sheet Hardness3 N/A HRB 88 / HB 176 or Less

Thread Specification

 N/A Internal, ANSI/ASME B1.13M, 6H

Fastener Material

 N/A 400 Series Stainless Steel

Standard Finish

 N/A Passivated and/or tested per ASTM A380

CAD Supplier

 N/A PennEngineering® (PEM®)
  • 1 The “L” dimension is the height of the installed stud at max grip. The height of the stud will increase if it is installed into thinner material. To calculate “actual L” use this formula: max grip - actual grip + L = “actual L”
  • 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.