Meet the STZ Industries 7 in. Black Steel Nipple — a rugged, reliable connector engineered for tough piping runs. This 3/4 in. MIP to 3/4 in. MIP nipple gives you two male-threaded ends set on a solid steel shaft, perfect for extending or bridging segments in metal plumbing, gas lines, or industrial fluid systems. The durable black finish adds protection against moisture and corrosion, helping your installation stand up to daily use and temperature swings.
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Ends: Two 3/4 in. MIP (male iron pipe) threads
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Length: 7 inches
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Material: Steel with a black finish
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Maximum pressure: Up to 217 psi
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Maximum temperature: Up to 400°F
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Lead content: Lead-free
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Packaging: Bagged
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Product type: Nipple
Why this nipple stands out
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Lead-free safety: Built with a lead-free composition, making it a safer choice for potable water and other household applications.
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Double-ended compatibility: MIP on both ends ensures easy integration with standard female fittings without extra adapters.
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Extended reach, fewer joints: At 7 inches, it provides flexible routing through tight spaces while reducing the number of joints that can leak or require maintenance.
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Durable construction: Black steel delivers strength and abrasion resistance for demanding environments—trustworthy in both residential and industrial setups.
Ideal use cases
Designed for professionals and DIYers tackling mid-length piping runs where rigid, threaded connections are preferred. Use this nipple to:
- Bridge gaps between fittings in water supply lines, heating circuits, or fuel systems
- Extend conduits in metal piping layouts where compact connectors are needed
- Replace worn or damaged nipples in service panels, boilers, or radiant heating installations
Installation tips for a reliable seal
- Clean threads and apply an appropriate thread sealant or PTFE tape suitable for the fluid in your system. Align fittings and hand-tighten before finishing with a wrench—give a measured extra turn to seat properly, but avoid over-tightening.
- Check for cross-threading during assembly; start by threading gently and ensuring a smooth engagement on both ends.
- Inspect after initial pressurization for leaks. If you detect seepage, re-tighten incrementally and re-apply sealant as needed.
- Store in a dry area to preserve the black finish and prevent rust on exposed threads before installation.
Choose the STZ Industries 7 in. Black Steel Nipple when you need a dependable, long-reach connection that stays secure under pressure and temperature, with the simplicity of MIP threads on both ends. It’s a practical, durable solution for shared projects, maintenance work, and professional plumbing or industrial setups alike.
