RMA A3 Dimensional Tolerances for Molded Solid Rubber Products 1/
TOLERANCES FOR MOLDED SOLID RUBBER PRODUCTS COMMON
SIZE (millimeters)		Fixed dimension tolerance 2/ (millimeters)	Closure dimension tolerance 3/ (millimeters)	Size - Inches (approximate)		Fixed dimension tolerance 2/ (inches)	Closure dimension tolerance 3/ (inches)
Above	Inclusive			Above	Inclusive
0	9.99	± 0.20	± 0.32	0	0.399	± 0.008	± 0.013
10	15.99	± 0.25	± 0.40	0.4	0.629	± 0.010	± 0.016
16	24.99	± 0.32	± 0.50	0.63	0.999	± 0.013	± 0.020
25	39.99	± 0.40	± 0.63	1	1.599	± 0.016	± 0.025
40	62.99	± 0.50	± 0.80	1.6	2.499	± 0.020	± 0.032
63	99.99	± 0.63	± 1.00	2.5	3.999	± 0.025	± 0.040
100	159.99	± 0.80	± 1.25	4	6.299	± 0.032	± 0.050
160 & over		To find fixed dimensional tolerances, multiply size by 0.5 percent			6.30 & over	To find fixed dimensional tolerances, multiply size by 0.5 percent

1/ This table should be used only with common shaped, all rubber parts.
2/ Fixed dimension tolerances apply individually to each fixed dimension by its own size.
3/ Closure dimension tolerances are determined by the largest closure dimension, and this single tolerance shall be used for all
other closure dimensions. (Closure dimension refers to any dimension in a plane parallel to the plane traced when the mold
closes.)

TOLERANCES FOR RUBBER SHEET PACKING
THICKNESS		TOLERANCES
Millimeters	Inches (approximate)	Millimeters	Inches
Under 0.80	Under 0.031	± 0.25	± 0.010
0.80 to 1.59	0.031 to 0.059	± 0.30	± 0.012
1.60 to 3.19	0.060 to 0.124	± 0.40	± 0.016
3.20 to 4.79	0.125 to 0.186	± 0.50	± 0.020
4.80 to 9.49	0.187 to 0.374	± 0.80	± 0.031
9.50 to 14.29	0.375 to 0.561	± 1.20	± 0.047
14.30 to 19.19	0.562 to 0.749	± 1.60	± 0.063
19.20 to 25.39	0.750 to 0.999	± 2.40	± 0.093
25.40 and over	1.00 and over	± 10%	± 10%