https://www.kopos.com/en/produkt/13284-samo-vrtny-sroub-s-tesnici-podlozkou
Metal sheet self-drilling screw with sealing washer | KOPOS KOLIN a.s.
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https://www.fastenerdata.co.uk/fasteners/washers/more-washers/washers-p-to-z/sealing/bspt.html
Fastenerdata - Bspt - Sealing Washer - WASHERS P to Z - MORE WASHERS - WASHERS - DIMENSIONS -...
Fastener Technical Specifications, fastener source of supply, Comprehensive Fastener data, fastener knowledge, fastener history, fastener products and fastener...
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