Keystone Screw Corporation is a leading domestic manufacturer of brass and silicon bronze cold-headed fasteners. With more than 60 years of manufacturing fasteners Keystone has built a solid reputation for very competitive pricing, the highest standards of quality, and unequalled customer service. We manufacture our products for various industries with major activity in the electrical, plumbing, and automotive industries with machine screws, plumbing bolts and fasteners, semi-tubular rivets, and hex-head cap screws, as well as being a leading provider of brass and silicon bronze cold-heading wire. We also manufacture fasteners using copper, aluminum and steel, servicing OEM’s as well as fastener distributors. We are ISO 9001:2008 certified.
800-523-6733
https://www.keystonescrew.com
https://www.ultimatehandyman.co.uk/ shows you how to tap a hole using a cordless drill and a taper tap. This is useful if you have a lot of holes to thread, or if you require holes tapping quickly.