Steel Externally Threaded Taper Pin With Hex Nut, Plain Finish, Standard Tolerance, #4 Pin Size, 1/4"-28 Thread Size, 0.248" Large End Diameter, 0.232" Small End Diameter, 3/4" Length (Pack of 5) Threaded taper pin with hex nut can be installed in and removed from a hole with one-sided access Tapers along length of the pin for installing in tapered holes Steel is often used in applications where strength is the primary consideration Plain surface has no finish Standard tolerance