2 1/2 inch triple stack deluge tips are machined from 6061-T6 aluminum seamless extrusions from the USA. The finish is a polished hardcoat anodize to MIL-A-8625 Tyle III, class 1. These smooth bore tips give quick availability to increase tip size quickly and effectivly.
The female threads of the middle tip on this set of stacks is 1 1/2" Playpipe Thread
NH or NST: National hose or national standard thread is often referred to as fire hose thread as this is by far the most common thread in use today by fire departments.
