Foster 4B3, 1/4" Hose x 3/8" Male NPT Reusable Hose Fitting, 1/2" OD, Reusable Series, Brass

A reusable hose-end fitting that screws onto the hose and threads to 3/8" male NPT — no crimping needed. The Foster 4B3 accepts 1/4" ID hose (1/2" OD) and lets you build or repair air-hose ends in the field. Brass construction.

Specifications

• Brand: Foster
• Series: Reusable Hose Fittings
• Part Number: 4B3
• Type: Non-swivel reusable hose adapter
• Hose ID: 1/4"
• Outside Diameter: 1/2"
• Thread: 3/8" Male NPT
• Material: Brass
• Connection: Screw-on reusable (requires hose clamp)
• Quantity: 1pc
• Origin: Made in USA

Why this fitting

• Reusable, no crimp — which means you assemble and re-use it on fresh hose with simple hand tools, no crimping machine.
• 1/4" hose ID fit — which means a correct match for 1/4" ID air hose (1/2" OD).
• 3/8" male NPT thread — which means it threads directly into couplers, plugs, or tools.
• Brass build — which means durable, corrosion-resistant performance.

Frequently asked questions

What is a reusable hose fitting?
A hose-end adapter you screw onto the hose by hand instead of crimping — so it can be removed and reused on new hose. Ideal for field repairs.

Does it need a hose clamp?
Yes — secure the hose to the barb with a hose clamp for a reliable connection.

A handy accessory for assembling and repairing air hose assemblies. Why buy from hpcouplers: Foster quality, responsive US-based support, accurate specs, fast shipping.