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STUDS Types: FH, FHS, FH4, TFH, TFHS, HFH, HFHS, HFHB, FHL, FHLS, Which use the proven self-clinching design,install with a squeeze in punched or drilled round holes and become permanently mounted in the thin sheet;Thread sizes #2 to #3/8"￡?and M3 to M10 Detail：

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