THREADED FASTENER

• Main Author: MATSUEDA YOICHI
• Format: Patent
• Language: Chinese; English
• Published: 01.10.2021
• Subjects: BLASTING; DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS ORMACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS,CLIPS, WEDGES, JOINTS OR JOINTING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; THERMAL INSULATION IN GENERAL; WEAPONS

The present invention provides a threaded fastener having a structure that has high productivity and good assembly workability, can be used even in a low axial force region, can prevent a decrease in axial force, and also has a water stop function for the inner and outer peripheries of a washer. The threaded fastener includes: a bolt having a head portion and a shaft portion in which a threaded portion is formed; a washer into which the shaft part is inserted and which is in contact with the head part; and a seal member provided on the outer peripheral side of the gasket, the gasket having a seat surface in contact with the member to be fastened and a recess provided so as to surround the seat surface, the seal member being fixed to the recess, the seal member being in contact with the member to be fastened in a water stop state in a state in which the seat surface is in contact with the member to be fastened, and the shaft portion being provided with a caulking portion, and a seal member crimped and fixed to