CD2028 – FITTING (1/4″M to 1/2″F)

This brass adapter connects a 1/4″ male flare (standard HVAC) to a 1/2″ female Acme swivel (R-134a automotive). It has a depressor tip and seal for a secure connection. Use it when you need to cross over between automotive and HVAC gauge sets or service tools.

Specs: 1/4″ male flare x 1/2″ female Acme swivel, brass, with depressor tip and seal

Replaces: CD2028

Fits: Adapts between 1/4″ SAE flare and 1/2″ Acme connections. Universal adapter.

In stock at Open To Public HVAC Parts in Dallas. We test parts at the counter before you buy. Call or text (214) 340-9421.

Specs

• TypeService valve fitting or adaptor
• Connections1/4"M to 1/2"F

What size are HVAC service fittings?

1/4 inch flare is the standard service port on residential equipment. Most of the adaptors and caps here step between 1/4 inch and other sizes so you can connect gauges, a recovery machine or a vacuum pump.

Why do I need a left-hand thread adaptor?

A2L refrigerants - R-454B and R-32 - use LEFT-HAND (reverse) threaded cylinder connections. It is a deliberate keying change so A2L equipment cannot be cross-connected to older refrigerant. Without the adaptor a standard hose simply will not start on the tank.

Does the cap actually matter?

Yes. The cap is the primary seal on a service port, not the Schrader core. The core is a valve; the cap with its gasket is what holds refrigerant in over years. A missing cap is a slow leak you will not find with a sniffer for a long time.

What is a core removal tool for?

Taking the Schrader core out so you can pull a proper vacuum through a full-bore path instead of through a tiny valve. On anything bigger than a small system it is the difference between a real vacuum and a long afternoon.

Male or female - how do I tell?

Male threads are on the outside of the fitting, female on the inside. The listings here spell out each end, for example 1/4" male to 1/2" female, so you can match what you already have.

Do you stock these?

On the shelf at 10226 Plano Rd, Suite 104 in Dallas.