Moeller Brass Hose Barb Fitting, 1/4 in. NPT x 3/8 in. Barb, Part 033434-10

The Moeller 033434-10 is a brass hose barb fitting used to connect fuel line hose to a threaded fuel system port. One end has a 1/4 inch NPT (National Pipe Taper) thread that screws into a fitting, tank, or fuel component, while the other end is a 3/8 inch barb designed to grip fuel hose and hold it securely under vibration and pressure. Brass construction resists corrosion from fuel and marine moisture and holds up to the heat and pressure cycling common in an engine compartment.

This fitting is intended for use when building, repairing, or upgrading a marine fuel line, and it is commonly paired with fuel hose, primer bulbs, and other fittings in a Mercury outboard fuel system. It gives builders and repair techs a reliable way to transition from NPT-threaded ports to barbed hose connections without needing to fabricate a custom adapter. The compact size (approximately 4.6 inches long by 1.9 inches wide) allows it to fit in tight engine compartment spaces where fuel lines are routed.

Specifications

• Brand: Moeller
• Manufacturer Part Number: 033434-10
• Product Type: Fuel Line Hose Barb Fitting
• Thread Size: 1/4 inch NPT
• Barb Size: 3/8 inch
• Material: Brass
• Color/Finish: Brass
• Dimensions: 4.6 inches long x 1.9 inches wide
• Weight: 0.1 pounds
• UPC: 739729334348

Fitment

Used in Mercury outboard fuel line and fitting systems.

Frequently Asked Questions

What is the Moeller 033434-10 hose barb fitting used for? The Moeller 033434-10 connects a threaded fuel system port to a length of fuel hose, using a 1/4 inch NPT thread on one end and a 3/8 inch hose barb on the other.

What thread and barb size does part 033434-10 have? Part 033434-10 has a 1/4 inch NPT thread on one end and a 3/8 inch hose barb on the other end.

Is the 033434-10 fitting made of brass? Yes, the Moeller 033434-10 is made of brass, which resists corrosion from fuel and moisture in a marine engine compartment.

What size fuel hose fits on the 033434-10 barb? The barb end of the 033434-10 is sized at 3/8 inch, so it is intended for use with 3/8 inch inner diameter fuel hose.

What are the dimensions of the Moeller 033434-10 fitting? The 033434-10 measures approximately 4.6 inches long by 1.9 inches wide.

How much does the Moeller 033434-10 fitting weigh? The Moeller 033434-10 weighs 0.1 pounds.

Is the 033434-10 fitting genuine Moeller equipment? Yes, the 033434-10 is a genuine Moeller part, not an aftermarket copy.

What system is the 033434-10 hose barb fitting designed for? The 033434-10 is designed for use in Mercury outboard fuel line and fitting systems.

Does the 033434-10 fitting come with any hose or clamps included? The 033434-10 is the hose barb fitting itself; fuel hose and hose clamps are sold separately.

Can the 033434-10 fitting be used for repairing an existing fuel line? Yes, the brass 033434-10 hose barb is commonly used to repair or rebuild a fuel line connection where a 1/4 inch NPT port needs to transition to 3/8 inch barbed hose.