Solid Brass Surface Screw Cup Washers. A - Refers to screw size it will fit. No.4 (2.9mm), No.6 (3.5mm), No.8 (4.2mm), No.10 (4.8mm) & No.12 (5.5mm). NO.10 - 4.8mm 13.6mm 2.1mm. TECHNICAL INFORMATION.
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