MARK WITH BASIC NUMBER (“NAS” OPTIONAL), EXCEPT MARK .1900-32 SIZE WITH
“10” AND MARK ,1640-32 SIZE WITH “8”, THESE SIZES ALSO TO BE MARKED “C”
FOR A-286. MARK WITH MANUFACTURER’S SYMBOL, GRIP DASH NUMBER, “D”
APPROXIMATELY 25% LARGER THAN OTHER NUMBERS. “D” IDENTIFIES BOLT
WHEN APPLICABLE (h) AND RECESS NUMBER ENCIRCLED. RECESS NUMBER TO BE
WITH DRILLED SHANK.