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Bronze thru-hull fitting with combination threads and nut

Groco Marine Products

Groco Marine Products 3/4" NPS NPT Combo Bronze Thru-Hull Fitting with Nut

SKU CH-8C52-9HT15

A bronze thru-hull fitting combines NPS and NPT threads with a nut for secure hull penetration

  • Bronze construction resists marine corrosion using C83600 alloy
  • Combination NPS/NPT threads connect to multiple pipe standards
  • UL 647B listing confirms compliance with marine safety requirements
  • Supplied with nut for immediate installation readiness

3/4" NPS NPT Combo Bronze Thru-Hull Fitting

The Groco Marine Products thru-hull fitting provides a reliable hull penetration for marine plumbing systems. Its C83600 bronze body resists corrosion in saltwater environments. The combination NPSM and NPT thread pattern allows direct connection to both straight and tapered pipe threads. This fitting is UL Listed 647B for marine safety compliance.

Practical limits of the combination thread standard

The NPSM and NPT combination thread requires careful sealing because straight and tapered threads seal differently. Installers must use appropriate sealant or tape for the specific thread type being used. Bronze construction limits use in highly acidic or galvanic corrosion scenarios without proper isolation. The fitting is not intended for pressurised systems exceeding the UL 647B rating.

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Price $15.99
Cheaper than about 82% of the 1,087 comparable items (median $57.99).

Specifications

Product
Brand nameGROCO

Questions about this item

Which thread combination should I choose for a 3/4-inch bronze thru-hull fitting?

This fitting uses an NPSM and NPT combination thread so it mates with both straight and tapered pipe threads in a single bronze body.

What does UL 647B listing mean for this bronze thru-hull once installed?

UL 647B listing confirms the C83600 bronze fitting meets the marine safety standard for through-hull connections on vessels.

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