Sometimes the manufacturer coats these in black oxide

Chrome Plated Acorn Head Primary Cover Screw Kit Fits Harley-Davidson 74's 1965-70

Generator Mounting Screws Chrome Plated Fits 1958-73 Harley-Davidson 45's

Enjoy hassle-free operation and improved reliability with this essential upgrade

This kit makes it possible by routing the throttle cable directly inside your handlebars

#9926-17 Upper & Lower Motor Mounting Allen Kit 1970-1984 Harley-Davidson Big Twin - Chrome Plated Subcategory_Exhaust Fabrication Parts Sometimes the manufacturer coats theseChrome plated allen screws, nuts and washers used to install motor to frame on Harley Davidson Big Twins 1970 1984. Made in Ohio, USA.