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All Categories > PEM / Penn Engineering > Standoffs & Spacers > Self-Clinching Standoffs > Type BSO, BSOA, BSOS Blind Threaded Standoffs > Type BSO, BSOA, BSOS Blind Threaded Standoffs (Metric) > Item # BSOS-3.5M3-14  

Item # BSOS-3.5M3-14

Self-clinching standoffs with blind threads. Thread sizes #4 to #10 and M3 toM5.
  • These standoffs, which use the proven self-clinching design, install with a squeeze in punched or drilled round holes - and become permanently mounted in the thin sheet.
  • PEM® brand thru-hole threaded standoffs are installed with their heads flush with one surface of the mounting sheet. When blind-threaded types are used, outer sheet surfaces are not only flush, but closed as well. Unthreaded standoffs are also available for spacing multi-panel assemblies.
  • Types SO4 and BSO4 standoffs are for installation into stainless steel sheets as thin as 0.040" / 1.02 mm.
  • Types TSO, TSOS, and TSOA self-clinching threaded standoffs provide permanent threads in sheets as thin as 0.025" / 0.63 mm.
  • PEM® self-clinching standoffs are also available on special order in non-heat treated carbon steel as type SON (thru-hole threaded) or BSON (blind threaded).
  • Types DSO and DSOS standoffs are available for close-to-edge applications.
  • If you require a standoff which we do not offer in this bulletin. We will be happy to work with you to satisfy your special need.
Quantity Discount Available.
Request Quote for orders less than 1000 or 5000, depending on fastener type.

 Specifications   Material & Finish Specifications   



Fastener Material

Stainless Steel

Thread Size x Pitch

M3 x 0.5

Thread Code


Length Code


Length L (+0.05/ -0.13)

14 mm

Min. F

6.5 mm

Min. Sheet Thickness

1.02 mm

Hole Size in Sheet (+0.08)

5.41 mm

C (-0.13)

5.39 mm

H Nom.

6.4 mm

Min. Dist. Hole C/L to Edge

6.8 mm



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Self-Clinching Standoffs Specs Sheet
(PDF, 943KB)