PARKER Compression Fitting Union: 1/4 in OD x 1/8 in OD Size, Compression x Compression
The PARKER Compression Fitting Union (MPN 4-2 HBZ-B) is a single-ferrule brass compression fitting with a 1/4 in OD x 1/8 in OD size, featuring a Compression x Compression configuration. Part of the CPI™ series, this…
SKU 3G-OTH-598455
Need installation or engineering help?
Ask a question
Product Description
The PARKER Compression Fitting Union (MPN 4-2 HBZ-B) is a single-ferrule brass compression fitting with a 1/4 in OD x 1/8 in OD size, featuring a Compression x Compression configuration. Part of the CPI™ series, this union is designed for reliable tube connections in industrial fluid systems.
Frequently Asked Questions
What is a PARKER Compression Fitting Union used for?
This single-ferrule brass compression union connects two tubes of different diameters (1/4 in OD and 1/8 in OD) in industrial fluid systems. It is part of the CPI™ series and provides a leak-tight seal for pneumatic, hydraulic, or instrumentation lines.
What are the specifications of the PARKER 4-2 HBZ-B?
The PARKER 4-2 HBZ-B is a Compression x Compression union with 1/4 in OD x 1/8 in OD tube sizes. It is made of brass, uses a single-ferrule CPI™ design, and is manufactured by PARKER. The MPN is 4-2 HBZ-B.
Where to buy PARKER compression fittings in worldwide?
3G Electric supplies PARKER compression fittings like the 4-2 HBZ-B to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this CPI™ brass union.
How to install a single-ferrule compression fitting?
Insert the tube fully into the fitting, then tighten the nut by hand until snug. Use a wrench to tighten an additional 1/4 to 1/2 turn for brass fittings. Do not overtighten. Always verify the tube is seated before pressurizing the system.
Used in
Common applications for PARKERPARKER Products
3G Electric supplies PARKER single-ferrule brass compression fittings. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.









