Description Manuals Videos Articles Clemco 21321 - Screw, 5/16-NC x 1-3/4 socket head This is an OEM replacement Socket Head Screw is for Auto Quantum Valve AQV Item # 9 Customers Also Viewed Screw, Hex Hed, Cap, 1/2 -NC x 1-3/4 inch #03455 $4.59 Service kit, Auto Quantum Valve Actuator #24446 $55.54 Set Screw, 1/4-NC x 1/2 inch Square Head #03080 $2.30