Some applications call for a bolt with less than full threads; to assist you making choices, we have included a column listing the Thread Length (T. L.). F. T. denotes Full Threads.
A few items have an asterisk after the size, for an explanatory note; please scroll down to the bottom of the table for the explanation.
As usual, each item has a shipping cost attached, and we will refund excess shipping at the time of shipment.
*B denotes Button Head; smaller diameter, but higher than the standard carriage bolt head. A round head with no drive. Has the square shank. Pictured in the image at the top of this page, upper left.
*O denotes the product is very oily, as if it has been in oil for long time, and is gummy as a result. Should clean up with solvent.
*R denotes a Rib Neck carriage bolt, rather than the normal square shank. Early carriage builders favored this type. Right of center in image above.
*S denotes a Short Neck carriage bolt, intended to be secured by placing through metal having a square hole. Too short a square shank to engage in wood, but just right for a wheelwright's bolted hubs. There are three examples in the image above, two as Black Oxide, and one Plain finish.
本文转自：China Industry News