| 摘要 |
A fastening element having a stem ( 11 ) with a tip ( 12 ) provided at one of its ends, a head ( 13 ) provided at another opposite end, and a guide cylindrical member ( 30 ) mounted on the stem ( 11 ) for guiding the fastening element ( 10 ) in a bolt guide ( 40 ) of a setting tool, and having a retaining section ( 33 ) for retaining a washer ( 20 ).
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