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Astoria Group to Boiler Group Flange Screw

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Product details

Management number 248410775 Release Date 2026/09/03 List Price $0.62 Model Number 248410775
Category

Astoria Group to Boiler Group Flange Screw

Longer Allen-head screw used on the outside of the group head, passing through the group, frame gasket, and frame into the boiler flange. Four are used per group.

SPECIFICATIONS

  • Size: M8 x 25 mm, Allen (hex socket) head
  • Quantity: 4 per group

COMPATIBILITY

  • Fits: All Astoria models, mounting the group head to the boiler flange (exterior)
  • Related part: Shorter M8 x 16 mm frame-to-boiler screw (AS_64)

INSTALLATION

DIY-friendly with a hex key, though torque all four evenly in a criss-cross pattern to keep the group seated square against the frame gasket.

PRO TIPS

  • Tighten these in a criss-cross (star) pattern rather than one at a time in sequence, this keeps even pressure on the frame gasket and helps prevent a boiler leak at the flange.

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