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Smith-Blair

421 Top Bolt Coupling, Steel, Double-Acting Bolt

The Smith-Blair 421 Top Bolt Coupling is a two bolt, stab fit coupling featuring removable/replaceable inner gaskets to expand range of product and reduce number of SKUs that must be stocked for joining plain end pipe. They are easy to install, with one bolt on each end to tighten; this style is sometimes called HYMAX-style, after the HYMAX Wide-Range Coupling.

The 421 top-bolt coupling is available in sizes from 2″ – 24″. All Smith-Blair couplings are epoxy coated.

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  • Guide/Manual: 421 Top Bolt Coupling, Double-Acting Bolt, Smith-Blair, Manual
  • Product Sheet: 421 Top Bolt Coupling, Double-Acting Bolt, Smith-Blair, Product Sheet
  • Specifications: 421 Top Bolt Coupling, Double-Acting Bolt, Smith-Blair, Specifications
  • Video: Smith Blair Top Bolt 421 422 Installation
  • Other Product Literature: Pipe Outside Diameter Chart

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Address: 36 Hudson Rd, Sudbury, MA 01776-2039

Phone: 800.225.4616

Fax: 978.443.7600

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