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Low Profile Hammer Union Cap

Low Profile Hammer Union Cap

  • hammer union cap
Part Number HUC100400
Description Blanking cap, includes nut/plug body, o-ring and retaining ring
Style Figure 100
Material Forged steel nut,
Iron bull plug
Size 4"
Working Pressure 1000 PSI
Mandatory Pkg/Box Qty 1
Weight Lb 13.5260
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  • Prevents leakage of hydraulic fracturing fluids from hammer union connections used on manifolds and hose assemblies.
  • Hammer union caps and plugs can be used in pressurized service or as dust caps/plugs on site or when transferring equipment.


  • Used with Grade 8 carbon steel bolt (HUBT716X100)
  • Used with Grade 30 steel bolt chain (HUCH20CS)


  • Forged steel meets AISI standards


  • Forged steel construction ensures longevity, reliability and performance
  • Low profile design for tight applications
  • Designed with reusable bull plug to rebuild cap


  • Iron bull plug to ASTM standards
  • O-ring is Buna-N (O347BU)


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