2057-440-AL-6,HEX STANDOFF #4-40 ALUMINUM 1/2"
【RAF Electronic Hardware】2057-440-AL-7,电路板硬件 - PCB 1/2 LGNTH 4-40 STD FML HEX STANDOFF
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2057-440-B-13,HEX STANDOFFBRIGHT DIP - BRASS3/
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