5501 Steel Male NPTF x Male NPTF 45° Elbow Union Check Part Number A (1) NPTF A (2) NPTF N4 N6 Y D (1) D (2) Aeroquip # Parker # 5501-02-02 1/8-27 1/8-27 0.63 0.66 0.50 0.19 0.19 2247-2-2S 5501-04-04 1/4-18 1/4-18 0.86 0.91 0.63 0.28 0.28 2247-4-4S 5501-06-06 3/8-18 3/8-18 0.95 1.00 0.81 0.41 0.41 2247-6-6S 5501-08-08 1/2-14 1/2-14 1.17 1.22 0.94 0.53 0.53 2247-8-8S 5501-12-04 3/4-14 1/4-18 1.20 1.16 1.13 0.72 0.28 2247-12-4S 5501-12-12 3/4-14 3/4-14 1.20 1.20 1.13 0.72 0.72 2247-12-12S 5501-16-16 1-11 1/2 1-11 1/2 1.48 1.63 1.38 0.94 0.94 2247-16-16S 5501-20-20 1 1/4-11 1/2 1 1/4-11 1/2 1.67 1.70 1.75 1.25 1.25 2247-20-20S 5501-24-24 1 1/2-11 1/2 1 1/2-11 1/2 1.77 2.02 2.00 1.34 1.34 2247-24-24S
