Patent ID: 7549679

Claim:
A fitting for a pipe comprising: a nut having a thread at an inner end and a ledge at an outer end; a spring washer positioned within said nut; a ring positioned on an opposed side of said spring washer from said ledge, and within said nut; a seal positioned on an opposed side of said ring from said spring washer, and said nut having threads extending beyond said seal, such that said nut can be tightened onto threads on a connection, and when said nut is tightened onto the connection, said spring washer being deformed to lock onto a pipe received within said nut, and said spring washer forcing said ring against said seal to deform said seal; a second washer positioned on an opposed side of said seal from said ring, with said second washer in contact with said seal, and said second washer having structure to lock said second washer within said nut and hold the spring washer, the ring and the seal within said nut, and said spring washer being a Belleville-type washer; and said second washer has circumferentially spaced tabs to lock said second washer within said nut.