Bykski B-PD5 Diamond Pattern Frost Dragon Print Hand-Tightening End Cap G1/4' Thread

Bykski B-PD5 Grooved G1/4 Stop Plug - Hand-Tighten Electroplated Brass Water Cooling Seal Fitting

TL;DR: The B-PD5-1 is a G1/4 thread stop plug used to seal unused fitting ports on reservoirs, distro plates, CPU and GPU blocks. The body is machined from electroplated brass with a grooved outer ring that grips by hand, so no tool is required for install and removal.

Common Applications

The B-PD5 is a G1/4 thread stop plug used to seal unused fitting ports on reservoirs, distro plates, CPU and GPU blocks. The body is machined from electroplated brass with a grooved outer ring that grips by hand, so no tool is required for install and removal. A captive o-ring on the threads provides the seal. Loops with aluminum components should use plugs matched to the rest of the build to avoid galvanic corrosion. Sold as a single plug with the o-ring fitted; tighten until snug - over-tightening makes future removal difficult.

Frequently Asked Questions

Q: What thread does the B-PD5-1 use?

A: G1/4, the standard water cooling thread. Compatible with any G1/4 port.

Q: What is it made of?

A: Electroplated brass body with a sealing o-ring on the thread.

Q: Do I need a wrench?

A: No. The grooved exterior is designed for hand tightening - finger-snug is enough.

Q: Is it safe for aluminum loops?

A: As a brass fitting, mixing it into an aluminum-rad loop can drive galvanic corrosion. Use only in non-aluminum (copper/brass) loops.