Process for Adhering Solid Lubricant to Surface of Interference Fit Fastener

    公开(公告)号:US20190032218A1

    公开(公告)日:2019-01-31

    申请号:US15663320

    申请日:2017-07-28

    Abstract: A method for treating surfaces of fasteners made of titanium alloy or corrosion-resistant steel using a sol-gel pretreatment process prior to the application of an aluminum pigment coating. The sol-gel pretreatment process produces an interface film on the fastener surface, which interface film comprises an organometallic-based network system. The interface film aids in improving adhesion and surface roughness when fasteners are used in interference fit conditions (i.e., the hole diameter is smaller than the fastener shank diameter).

    Blind tack fastener and methods of manufacture

    公开(公告)号:US11313398B2

    公开(公告)日:2022-04-26

    申请号:US16543704

    申请日:2019-08-19

    Abstract: The present disclosure provides a blind tack fastener. The blind tack fastener includes an elongated body having a first end and a second end opposite the first end. The blind tack fastener also includes a collar surrounding a portion of the elongated body. The blind tack fastener also includes a sleeve surrounding the elongated body and positioned between the second end of the elongated body and the collar. A region of the sleeve is band annealed.

    BLIND TACK FASTENER AND METHODS OF MANUFACTURE

    公开(公告)号:US20210054864A1

    公开(公告)日:2021-02-25

    申请号:US16543704

    申请日:2019-08-19

    Abstract: The present disclosure provides a blind tack fastener. The blind tack fastener includes an elongated body having a first end and a second end opposite the first end. The blind tack fastener also includes a collar surrounding a portion of the elongated body. The blind tack fastener also includes a sleeve surrounding the elongated body and positioned between the second end of the elongated body and the collar. A region of the sleeve is band annealed.

    ELECTROMAGNETIC EFFECT PROTECTIVE FASTENER WITH SWAGEABLE TERMINATION BODY

    公开(公告)号:US20190301518A1

    公开(公告)日:2019-10-03

    申请号:US15941676

    申请日:2018-03-30

    Abstract: An electromagnetic effect suppressing termination part for a fastener formed of a metallic material, the fastener having a head, a shank, and a male threaded portion opposite the head, has a metallic core coated by a layer of dielectric material. An internal bore of the termination part includes an inner wall, a counterbore hole, and a cavity disposed therebetween. An outer surface includes an outer wall, and a frustoconical wall positioned proximally relative to the outer wall, the frustoconical wall extending radially outwardly from the outer wall and having an included angle of less than approximately 90 degrees. A seal is disposed in the counterbore hole, and the frustoconical wall is configured so that a compressive force applied to the frustoconical wall deforms the inner wall to conform to the male threaded portion of the fastener and deforms the seal to fill the cavity.

    Radiused Lead-In for Interference Fit Fasteners

    公开(公告)号:US20180238370A1

    公开(公告)日:2018-08-23

    申请号:US15437259

    申请日:2017-02-20

    Abstract: An assembly comprising first and second structural elements having aligned holes, an fastener that occupies at least respective portions of the holes without a surrounding sleeve, and a mating part that is coupled to the fastener. The fastener comprises: a head; a circular cylindrical shank extending from the head; a mating portion comprising external projections; and a transition portion disposed between the shank and the mating portion. The transition portion comprises a first radiused lead-in section that meets the shank at a shank/lead-in intersection and a second radiused lead-in section that meets the first radiused lead-in section. The first radiused lead-in section curves gradually in a first axial direction toward the mating portion and has a first profile that is a circular arc having a first radius, while the second radiused lead-in section curves abruptly in the first axial direction and has a second profile that is a circular arc having a second radius which is much smaller than the first radius.

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