This 14-gage stainless steel part made by MAR-K is mounted across the frame under the wood for support. Bolt holes in the cross sill determine the placement of the bed strips and wood. The bed strips and bed sides are bolted to the cross sill and the wood is bolted to the frame through the cross sill by the bed-to-frame bolts. Cross sill is sold with holes and includes brackets. Holes for step braces are also included. Part is covered with plastic film to protect the stainless surface. This will need to be removed before installation. Part is approximately 2-1/8 inches tall. Made in Oklahoma City, USA.
This part fits most 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 Chevy Trucks; exceptions may apply. Please read the complete description to see if this part fits your specific vehicle and application.