Breco DS3F3-B, 3/8" ISO-B Hydraulic Plug x 3/8" Female NPT, ISO-B Series, Brass

Product Details

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Breco DS3F3-B is a brass 3/8" plug in the DS Series, which interchanges with Foster FHK and other ISO-B couplings on hydraulic tools, machinery, and equipment. Two-way shut-off, rated to 2200 PSI. (Also known as the DS Series.)

Why this plug

• ISO-B interchange — couples with any ISO 7241-1 Series B half of the same body size, the most common hydraulic standard.
• Two-way shut-off — both halves seal on disconnect, preventing fluid loss and air inclusion.
• Brass body — rated to 2200 PSI with a 4:1 safety factor per ANSI/B93.2.

Frequently asked questions

Are these ISO-B couplers?
Yes — the Breco DS Series is compatible with ISO 7241-1, Series B, the most widely used industrial hydraulic interchange. It mates with Foster FHK and other ISO-B halves of the same body size.

What coupler does it take?
Any 3/8 coupler on the same ISO-B interface in matching brass. The matching Foster coupler is H3B.

Can I connect it under pressure?
No. ISO-B couplings connect and disconnect at zero pressure. Relieve system pressure first.

Why buy from hpcouplers: Breco quality, responsive US-based support, accurate specs, fast shipping.

ISO-B Series (ISO 7241-1 Series B / FHK) — Complete Series Chart

The size you are viewing is shown first, with the rest of the series below. Base couplings appear before ball lock and seal options. Dust caps and plugs fit by body size and are labeled by which half they protect. Click any part number to open that product.