A-C211015-AI Dust Cap, 1/2", Black model-9410R This item is # 12

This item is # 12 in the second picture above

Compatible with R12/R134a refrigerant systems

quiet clutch engagement for reliable mowing performance

This threaded track adjuster nut is used in the mechanical track tensioning system on Fits Case 310 series crawler dozers

the hydraulic system should be flushed and refilled with clean

A-C211015-AI Dust Cap, 1/2", Black model-9410R This item is # 12Ten New Aftermarket Replacement Hydraulic Coupler Dust Caps, 1 2" Body Size, Black (10 Pack) This pack of 10 black rubber dust caps is designed to protect 1 2" body AG style (ISO 5675 Pioneer style) hydraulic quick couplers from dirt, debris, and contaminants when the coupler is disconnected. Keeping hydraulic connecting surfaces clean extends coupler life and helps prevent system contamination on tractors, skid steers, and agricultural equipment.