Parker 4-8 Fbz-b Compression Tube Connector 1/2 in Mnpt Brass

Product Description

The PARKER 4-8 FBZ-B is a straight brass compression tube connector designed to join tubing to a male NPT threaded port. It uses a compression-style end on one side and a 1/2-inch MNPT thread on the other, creating a leak-resistant mechanical connection without soldering or brazing. Manufactured from brass to ASTM-B-453 and ASTM-B16 standards, this fitting is rated to 3500 psi working pressure. It measures 1.76 inches in overall length and weighs 0.18 pounds. HVAC technicians, plumbers, and pipefitters install this type of fitting in fluid and gas distribution lines where a reliable tube-to-pipe transition is required.

This compression-to-MNPT connector suits residential and light commercial applications where copper or compatible tubing must terminate at a threaded pipe port. Common install scenarios include refrigeration lines, instrument tubing runs, pneumatic control circuits, and general fluid handling systems. The straight configuration keeps the connection in-line with no directional change, which is useful in tight plumbing arrangements or instrument manifold work.

Key Features

• Compression x MNPT end connections for tool-assisted, solder-free assembly
• Straight fitting shape keeps the flow path in-line
• 3500 psi maximum working pressure for demanding service environments
• Brass construction meets ASTM-B-453 and ASTM-B16 material standards
• 1/2-inch thread size on the NPT end for standard pipe compatibility
• Compact 1.76-inch overall length suits space-constrained installations

Compatibility

Designed as a standard compression-to-MNPT connector for use with compatible tubing sizes in fluid and gas distribution systems. Cross-reference Swagelok part number B-400-1-8 for interchangeability verification.

Installation Notes

Installation is performed by qualified plumbers, HVAC technicians, or pipefitters. Shut off system pressure and depressurize the line completely before disassembly or installation. Apply thread sealant or PTFE tape to the MNPT threads in accordance with local plumbing codes and the fitting manufacturer guidelines. Hand-tighten the compression nut before applying the recommended number of wrench turns per the compression fitting standard being followed — do not overtighten, as this can deform the ferrule and compromise the seal.