Hardware DRAIN PLATE 6 INCH DIA X .140 THICK OUTDOOR FLOOR CLEANOUT COVER STEEL

This looks like it may have been trimmed down from 6.50 inch since the outer diameter is 24 flat chords, not perfectly round.  0.140 inches thick = 9/64

Photos 8719 - 8736

VINTAGE ANTIQUE OLD SCHOOL JOB SHOP MANUAL MACHINING TOOLS TEACHING COLLEGE CO-OP TRAINING MACHINING TESTING PRACTICE   DATE LIKELY 1970s - 1982

COMBINE SHIPPING BY PUTTING BUY-IT-NOW ITEMS IN CART AND THEN REQUEST INVOICE FOR 2 OR MORE ITEMS.  SHIP COST BASED ON TOTAL WEIGHT INCL PACKAGE PLUS EBAY FEE ON SHIP COST PLUS MISC COST.

Combined items reduces total shipping cost.  I will combine into a 1 package weight shipping.