Part Number: 51521B6 (Elbow, tube 90 deg swivel nut 37)Part Number: 6500-08-08-FG-NS (Elbow, tube 90 deg swivel nut 37)Part Number: 6500-10-10-FG-NS (Elbow, tube 90 deg swivel nut 37)Part Number: 6500-20-20-FG (Elbow, tube 90 deg swivel nut 37)Part Number: MS51521-10 (Elbow, tube 90 deg swivel nut 37)Part Number: MS51521-12 (Elbow, tube 90 deg swivel nut 37)Part Number: MS51521-16 (Elbow, tube 90 deg swivel nut 37)Part Number: MS51521-2 (Elbow, tube 90 deg swivel nut 37)Part Number: MS51521-20 (Elbow, tube 90 deg swivel nut 37)Part Number: MS51521-24 (Elbow, tube 90 deg swivel nut 37)Part Number: MS51521-3 (Elbow, tube 90 deg swivel nut 37)Part Number: MS51521-32 (Elbow, tube 90 deg swivel nut 37)Part Number: MS51521-4 (Elbow, tube 90 deg swivel nut 37)Part Number: MS51521-40 (Elbow, tube 90 deg swivel nut 37)Part Number: MS51521-5 (Elbow, tube 90 deg swivel nut 37)Part Number: MS51521-6 (Elbow, tube 90 deg swivel nut 37)Part Number: MS51521-8 (Elbow, tube 90 deg swivel nut 37)Part Number: MS51521A2 (Elbow, tube 90 deg swivel nut 37)Part Number: MS51521A20 (Elbow, tube 90 deg swivel nut 37)Part Number: MS51521A32 (Elbow, tube 90 deg swivel nut 37)Part Number: MS51521A40 (Elbow, tube 90 deg swivel nut 37)Part Number: MS51521A40S (Elbow, tube 90 deg swivel nut 37)Part Number: MS51521A5 (Elbow, tube 90 deg swivel nut 37)Part Number: MS51521B12Z (Elbow, tube 90 deg swivel nut 37)Part Number: MS51521B165 (Elbow, tube 90 deg swivel nut 37)Part Number: MS51521B16SS (Elbow, tube 90 deg swivel nut 37)Part Number: MS51521B20Z (Elbow, tube 90 deg swivel nut 37)Part Number: MS51521B24Z (Elbow, tube 90 deg swivel nut 37)Part Number: MS51521B2Z (Elbow, tube 90 deg swivel nut 37)Part Number: MS51521B40 (Elbow, tube 90 deg swivel nut 37)Part Number: MS51521B40S (Elbow, tube 90 deg swivel nut 37)Part Number: MS51521B40Z (Elbow, tube 90 deg swivel nut 37)Part Number: MS51521B5 (Elbow, tube 90 deg swivel nut 37)Part Number: MS51521B6B (Elbow, tube 90 deg swivel nut 37)Part Number: MS51521B6K (Elbow, tube 90 deg swivel nut 37)Part Number: MS51521B85B (Elbow, tube 90 deg swivel nut 37)Part Number: MS51521B8Z (Elbow, tube 90 deg swivel nut 37)