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Mechanical Bolt Anchor

The Calk-In is a pre-assembled precision cast calking type machine bolt anchor which can be used in concrete, block and brick. It can also be considered for stone. The Calk-In consists of an antimonial lead alloy calking sleeve and a Zamac alloy internally threaded expanded cone. This anchor is not recommended for use in overhead applications or for life safety.

Suitable Base Materials

  • Normal-weight concrete
  • Grouted-filled Concrete Masonry (CMU)
  • Brick Masonry

General Applications & Uses::

  • Windows
  • Screens
  • Sliding Doors
  • Shutters

Features & Benefits:

  • Readily accepts coarse thread machine bolts including sidewalk bolts
  • Internally threaded anchor for easy removability of attachment and service work
  • Shallow embedment


  • Federal GSA Specification – Meets descriptive characteristics of CID A-A-1922A, Type 1 (formerly FF-S-325, Group 1, Type 1, Class 1)
  • Tested in accordance with ASTM E488 in uncracked concrete and masonry