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Hexagon Head Bolts EN ISO 4014 - DIN 931

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Hexagon head fasteners conforming to the specification EN ISO 4014 and DIN 931 are a widely used kind of threaded fasteners. These screws feature a six-sided head, which allows for reliable tightening using a six-point https://hannawpbg614429.blogdigy.com/bolts-din-931-hex-head-en-iso-4014-48595021

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