Description

When you’re working on hydraulic systems, air compressor setups, or fuel lines around the farm, you need a reliable way to seal off unused ports or close out test lines. This 1/4-inch black iron cap threads right onto any matching male NPT fitting to give you a solid, leak-proof seal that won’t back out under pressure. It’s the simple, dependable solution when you need to cap off a line and get back to work.

What You’re Getting

Female NPT threads for secure connection to 1/4-inch male fittings
Black iron construction that handles high pressure without cracking
Compact design that won’t get in the way or snag on things
Easy installation—just thread on and tighten with a wrench

Built for Real Farm Work

This cap works great for sealing hydraulic manifolds on tractors, capping unused ports on air compressors, or blocking off fuel system test ports during repairs. You’ll find these threaded caps handy for everything from loader circuits to PTO hydraulics, wherever you need to close off a 1/4-inch NPT opening cleanly and securely.

Made to Last

Black iron fittings are the workhorse of farm plumbing because they don’t crack under pressure like plastic can. The material handles temperature swings from winter shop work to hot summer field repairs, and the threads stay tight even after multiple removals.

Installation Notes

Use a little pipe thread sealant or Teflon tape for the best seal, especially on hydraulic applications. Hand-tight plus a quarter turn with a wrench is usually all you need for a solid seal without overtightening the threads.