The Williams High Speed Tap & Drill Set, 8-40 (Williams part no. 1768) pairs a matched 8-40 tap with a No. 28 drill bit, giving a gunsmith the exact hardware needed to thread and drill for common 8-40 screw applications like sight and scope-base mounting. Williams Gun Sight builds this set in a durable metal construction with a silver and black finish, keeping both pieces matched to spec so the resulting thread comes out clean and true the first time.

Key Specifications

• Tap size is 8-40, matched with a No. 28 drill bit.
• Constructed from metal with a silver and black finish.
• Overall length measures 4.25 inches.

Frequently Asked Questions

What drill bit is matched to this tap? A No. 28 drill is matched to the 8-40 tap for correct pilot-hole sizing.

What is an 8-40 tap commonly used for? It’s a common thread size for gunsmithing tasks like mounting sights and scope bases.

Buy the Williams High Speed Tap & Drill Set, 8-40

Get a clean, properly sized 8-40 thread on your next gunsmithing project. Order it from our Williams Gun Sight lineup of gunsmithing tools for fast, direct shipping from our Lubbock, Texas gun shop.