Size: M2 / M3 / M4 / M5. Size: M2 / M3 / M4 / M5 / M6. M2 M3 M4 M5 M6. 20PCS Nylon Insert Self-Lock Nuts. Type: Aluminum Alloy Hex Nuts. 20PCSSelf-Lock Nut. Material: 6061 Aluminum / Nylon. Material: Aluminum / Nylon.
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