The new, 4” heavy-duty 404 Series nylon couplers/adapters
have a heavier wall construction than the standard for greater strength. All 404
Series couplers come standard with four stainless steel handles for a more
secure connection in higher pressure applications. The fittings are constructed
in glass-reinforced nylon for lightweight, with the strength to resist cross
threading, thread seizure and “out-of-round” condition. The non-conducting
nylon fittings are chemical resistant to most acids and are interchangeable
with other couplers and adapters manufactured to MIL-spec.