Danfoss / Eaton Hansen and Gromelle B3T21 Plug Brass 3/8-18 IN NPTF Female 3/8 IN Body Size

Description & Features

Constructed from brass with a Buna-N seal, this straight-through ball lock plug is designed for reliable quick connect and disconnect performance without the need for special tools. The Danfoss / Eaton Hansen and Gromelle B3T21 Plug Brass 3/8-18 IN NPTF Female 3/8 IN Body Size features a 3/8 IN NPTF female port and a push-to-connect male half configuration, supporting flow rates up to 15 gallons per minute.

Rated for operation down to -40°F, this coupling is well suited for demanding fluid transfer applications across industries including chemical processing, food and beverage, injection molding, marine, medical, pressure washing, and steam cleaning. It exceeds ISO 16028 operating pressure standards, making it a dependable choice where connection integrity matters.

SKU: B3T21

Supplier Part Number (MPN): B3T21

Specifications

Brand
Danfoss
Connection Size 1
3/8 in
Connection Size 2
3/8 in
Connection Style
Manual
Connection Type
FNPT
Connection Type 1
Female NPTF
Connection Type 2
Female NPTF
Dimensions
0.94 in Dia x 1.63 in L
Fitting Type
Coupling
Fluid Compatibility
Versatile Fluids
Hex Size
0.81 in
Latch Type
Push-to-Connect
Material
Brass
Material Construction
Brass
Operating Temperature
-40 to 250 deg F
Seal Material
NBR
Series
ST Series
Thread Size
3/8-18
Valve Type
Straight

Product Questions & Answers (1)

Question by: Harold W on Jan 15, 2026, 2:49 PM
got a 3/8-18 nptf female port on my line. does this B3T21 plug screw right into that and still give me a quick-connect on the other end?
Answer by: Customer Support on Jan 17, 2026, 7:00 AM
With a 3/8-18 NPTF female port on the plug, it’s meant to mate to a 3/8 NPTF male thread on your equipment. The opposite end is the push-to-connect male half, using a ball lock style for quick connect and disconnect without special tools.

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