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Pull-style expander seals use an integrated mandrel to insert the expander plug into a drilled hole. The KOENIG EXPANDER® Series SK / SKC 550 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. If you are unsure if the SK / SKC 550 expander sealing plug series is the right component for your application, use our Product Selector to identify the best KOENIG EXPANDER part for your specifications.
| PRESSURE PERFORMANCE | |||||||
| Base Material of the Installation | |||||||
| Series | High Strength Steel | Case Hardened Steel | Ductile Cast Iron | Gray Cast Iron | Aluminum-Alloy | Aluminum-Alloy | Cast Aluminum-Alloy |
| SK 550 | ETG-100 / 44SMn28 | C15Pb / 1.0403 | EN 1563: GJS-600-3 | EN 1561: GJL-250 | AICu4Mg1 / EN AW-2024-T3 | AIMgSiPb / EN AW-6012-T6 | G-AISi7Mg / EN-AC-42100 |
| mm | AISI 11441 | AISI 10L15 | ASTM A536: 80-60-03 | ASTM A48: NO.35 | AA: 2024 T4/T6* | AA: 6012-T6 | ASTM/UNS: A356 |
| Ø 4 – 10 | 1600 bar / 23200 psi | 1400 bar / 20300 psi | |||||
| 500 bar / 7200 psi | 450 bar / 6500 psi | ||||||
| Ø 12 | 1600 bar / 23200 psi | ||||||
| 400 bar / 5800 psi | |||||||
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Wagle Estate, Thane, Maharashtra 
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