From our MB850 Series:

MB 850-120

KOENIG EXPANDER® plugs effectively seal drilled holes. These parts feature a serrated sleeve which expands as the ball is inserted, enlarging the part to the needed size and sealing the hole. For installation, push-style expanders require a hole drilled with a counter bore.

Specifications for: MB 850-120

d1 d2 +0.10 / -0 d3 Max l1 (l2) ~ Ref. l3 min. x ±0.2 (s) ~ Ref. Packaging Unit Weight in gram/pcs.
12 12 10.6 13 17.9 12.8 0.4 5.5 50 / 250 9.31
d1 12
d2 +0.10 / -0 12
d3 Max 10.6
l1 13
(l2) ~ Ref. 17.9
l3 min. 12.8
x ±0.2 0.4
(s) ~ Ref. 5.5
Packaging Unit 50 / 250
Weight in gram/pcs. 9.31

* SFC KOENIG’s North American Engineering Department utilizes 2024-T4/T6 as a test base material.