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PRECISION GROUND COSE HARDENED 4-6-8 BLOCKS,HARDNESS IS HRC55-62.
 
ART. NO. PARALLEL SQUARENESS SIZE ERROR    HOLES
513 77 01 0.0005" NO ±0.0005" 23
513 77 02 0.0005" 0.0005"/1" ±0.0005" 23


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