Fastener
    1.
    发明授权
    Fastener 失效
    紧固件

    公开(公告)号:US3850073A

    公开(公告)日:1974-11-26

    申请号:US33886473

    申请日:1973-03-07

    申请人: BERRYFAST INC

    发明人: HAYES K

    IPC分类号: E04D3/36 F16B15/06 E01B9/06

    CPC分类号: F16B15/06 E04D3/3603

    摘要: A fastener adapted for attaching roofing insulation to a sheet metal base has a shank of a nominal diameter terminating on the one end in a head and at the opposite end in a point and has a threaded portion on only a part of the shank, the threaded portion tapering inwardly in diameter in the direction of the point so as to originate and terminate in shank portions of the nominal diameter and the threaded portion having a plurality of longitudinal helical grooves formed therein.

    摘要翻译: 用于将屋顶绝缘件附接到钣金底座的紧固件具有标称直径的柄部,其终止于头部的一端,并且在相对端处一点,并且仅在柄的一部分上具有螺纹部分,螺纹 部分在该点的方向上向内逐渐变细,从而产生并终止在公称直径的柄部中,并且螺纹部分具有形成在其中的多个纵向螺旋槽。