M0504-3-S,METRIC ROUND SPACERPLAIN STEEL4.
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【RAF Electronic Hardware】M0504-3-SS,电路板硬件 - PCB 5mm, 3.2 ID,, M3 ROUND METRIC SPACER
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M05-050SB0,HEAT EXCHANGER
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【RAF Electronic Hardware】M0505-25-AL,电路板硬件 - PCB 6mm, 2.7 ID, M2.5 ROUND METRIC SPACER