N53-40F40T Dixon Aluminum Swivel Female x Rigid Female Adapter - Style N53 - Rocker Lug - 4" Female NST(NH) x 4" Female NPT - Old Part #: ASF40F40TPart Number Swivel Thread Rigid Thread Old Part #: Weight (Lbs.) N53 15S15T 1 1 2" Female NPSH 1 1 2" Female NPT 0. 5120 N53 20S20T 2" Female NPSH 2" Female NPT 0. 5620 N53 30S30T 3" Female NPSH 3" Female NPT 1. 8810 N53 60S60T 6" Female NPSH 6" Female NPT 6. 5860 N53 15S15S 1 1 2" Female NPSH 1 1 2" Female NPSH 0. 5380 N53 15F15T 1 1 2" Female NST(NH) 1 1 2" Female NPT 0. 5500 N53 25F20T 2 1 2" Female NST(NH) 2" Female NPT ASF25F20T 1. 2130 N53