SK 552-040


Pull-style expander seals use an integrated mandrel to insert the expander plug into a drilled hole. This type of KOENIG EXPANDER® plug does not require the hole to be counter-bored, and is often used for angled channels or installations with difficult orientations. They are ideal for installations with space or weight constraints.


    • Part Name
    • SK 552-040
    • d1
    • 4
    • d2
    • 2.5
    • d3 +0.12 / -0
    • 4
    • l1
    • 4.5
    • l2
    • 69
    • l3 max.
    • 7.8
    • L4 Max. (BO)
    • 6.5
    • Packaging Unit
    • 100 / 1000
    • Weight in gram/pcs.
    • 2.87

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

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Koenig Expander® Spacer Series SK Setting Tool
To view pressure performance information, technical downloads and other information visit the Series SK 552 Long Mandrel page.