M8 Aluminium Weld-In Boss – HE30 Radiator / Drain Tap / Temp Sender. M8 female threaded weld-in boss. Thread M8 (Female). ThisM8 aluminium weld-in boss is machined from high-qualityHE30 aluminium, making itperfect for welding into aluminium radiators, header tanks, and fabricated cooling components.
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