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All Categories > PEM® Brand Fasteners for Metal Sheets and Panels > Standoffs for Sheet Metal > Blind, Threaded Standoffs – Types BSO, BSO4, BSOA, BSOS > Blind Threaded Standoffs – Types BSO, BSOA, BSOS > Blind Threaded Standoffs - Types BSO, BSOA, BSOS - Metric > Part # BSOS-3.5M3-14  
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Part # BSOS-3.5M3-14, Blind Threaded Standoffs - Types BSO, BSOA, BSOS - Metric

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.

When blind-threaded types are used, outer sheet surfaces are not only flush, but c


Thread Size x Pitch

M3 x 0.5

Thread Code


Length Code


Material Code


Min. Sheet Thickness

1 mm

Hole Size in Sheet + 0.08

5.41 mm

C - 0.13

5.39 mm

F Min.

6.50 mm

H Nom.

6.4 mm

L - Length +0.05 –0.13

14 mm

Min. Dist. Hole C/L to Edge

6.8 mm

For Use in Sheet Hardness1

HRB 70 / HB 125 or Less

Thread Specification

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

Fastener Material

300 Series Stainless Steel

Standard Finish

Passivated and/or tested per ASTM A380

CAD Supplier

PennEngineering® (PEM®)
1 HRB - Hardness Rockwell “B” Scale. HB - Hardness Brinell.


PEM Bulletin SO

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