Patent ID: 8475102

Claim:
A sleeve interference fastener adapted to be installed in a hole of a structure comprising: a.) a sleeve having a head at one end and a tubular portion, the tubular portion having an inner diameter and an outer diameter, wherein the outer diameter of the tubular portion is less than an inner diameter of the hole of the structure; b.) a pin member having a pin head at one end, a locking portion at an opposite end, and a shank portion intermediate the pin head and the locking portion, i) wherein the shank portion, located below the pin head, has a diameter greater than the inner diameter of the tubular portion of the sleeve, ii) wherein the pin member has a transition zone between the shank portion and the locking portion, and iii) wherein the locking portion of the pin member and the transition zone of the pin member are coated with a low friction dielectric coating and the shank portion of the pin member is free from the low friction dielectric coating; c.) a locking member adapted to fit over the locking portion of the pin member; d.) wherein the sleeve is adapted to expand radially over the shank portion of the pin member to form an interference fit between the outer diameter of the sleeve and the hole of the structure so as to provide an installed position; e.) wherein, in the installed position, a first interface between the shank portion of the pin member and the inner diameter of the sleeve is substantially free from the low friction dielectric coating; and f.) wherein, in the installed position, the transition zone of the pin member and a second interface between the locking portion of the pin member and the locking member are substantially covered with the low friction dielectric coating.