Our NS40 series (2-way sleeve coupler) and NS20 (1-way sleeve coupler) are a general purpose or agricultural quick connect that feature either a one-way or two-way sleeve (the two-way sleeve permits one hand hook up and breakaway when clamp or bulkhead mounted). Available with either ball or poppet type checks (both interchangeable, however ball & poppet type are not designed for use with each other and may affect performance). Compatible with Parker/Pioneer 4000 series, Safeway S20/40/70 series, Dayco QD2/QD4 series, Snaptite 21 series, Perfecting R series, and Aeroquip FD76 series. They come with Buna-N seals (-29°C (-20°F) to +100°C (+212°F), other seals available on request) and available with NPT, SAE ORB, or BSPP threads.