How do the Festo Festo QB38 Series variants differ?

Festo QB38 Series part numbers differ by connection method, material, mounting and operating pressure. Use the selection guide above to pick by connection method.

How many Festo Festo QB38 Series part numbers are listed?

12 Festo Festo QB38 Series part numbers are listed, each with specifications and a datasheet where available.

How do I get pricing and lead time for Festo Festo QB38 Series?

Request a quote (RFQ) for any Festo QB38 Series part number and we confirm price, availability and lead time per line — including end-of-life and hard-to-find variants.

Festo QB38 Series

Variant comparison

Parameter	QB-3/8H-1/4-U	QB-3/8T-5/16-U	QB-3/8T-U	QB-3/8-1/2-U	QB-3/8-1/2-U-M	QB-3/8-3/8-U
Connection method	Push-In to Sleeve	Push-In	Push-In	Push-In to Threaded	Push-In to Threaded	Push-In to Threaded
Material	Polybutylene Terephthalate (PBT)	Polybutylene Terephthalate (PBT)	Polybutylene Terephthalate (PBT)	Nickel Plated Brass	Polybutylene Terephthalate (PBT)	Nickel Plated Brass
Mounting	Free Hanging (In-Line)	Free Hanging (In-Line)	Chassis Mount	Free Hanging (In-Line)	Free Hanging (In-Line)	Free Hanging (In-Line)
Operating pressure	-13.8 to 145 PSI (-0.95 to 10 bar)	-14 to 145 PSI (-1 to 10 bar)	-14 to 145 PSI (-1 to 10 bar)	-14 to 145 PSI (-1 to 10 bar)	-14 to 145 PSI (-1 to 10 bar)	-14 to 145 PSI (-1 to 10 bar)
Product type	Straight Fitting	Adapter	Straight Fitting	Straight Fitting	Straight Fitting	Straight Fitting