PTB 017 019 17mm - 19mm 0.6mm M5 18mm W1 - Zinc Plated Rolled Edges Hex Head. PTB 020 022 20mm - 22mm 0.6mm M5 18mm W1 - Zinc Plated Rolled Edges Hex Head. PTB 023 025 23mm - 25mm 0.6mm M5 18mm W1 - Zinc Plated Rolled Edges Hex Head.
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