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Manufacturers produce engineering plastics that are slightly oversize in either diameter and/or thickness. This oversize tolerance, which is listed in the tables below, is provided to assist customers to produce very accurate items within the size shown and remove any minor surface imperfection.

Nylon 6 Extruded Rod Tolerances

Nominal Diameter	Tolerance in mm
4	+0.1 to +0.3
5 - 6	+0.1 to +0.4
8 - 10	+0.1 to +0.5
12 - 14 - 16 - 18 - 20	+0.2 to +0.7
22 - 25 - 28 - 30	+0.2 to +0.9
32 - 36 - 40	+0.2 to +1.1
45 - 50 - 56	+0.3 to +1.3
60 - 65 - 70	+0.3 to +1.6
75 - 80	+0.1 to +2.0
90	+0.5 to +2.2
100	+0.6 to +2.5
110	+0.7 to +3.0
120 - 125	+0.8 to +3.5
130 - 135 - 140	+0.9 to +3.8
150	+1.0 to +4.2
165 - 180	+1.2 to +5.0
200	+1.3 to +5.5
230 - 250	+1.5 to +6.2

Nylon 6 Cast Rod Tolerances

Nominal Diameter	Tolerance in mm
50 - 56	+1 to +3
60 - 65 - 70 - 75 - 80 - 90 - 100	+1 to +4
110 - 120 - 125 - 130 - 140 - 150	+1.5 to +5
160 - 170 - 180 - 190 - 200	+2 to +7
220 - 230 - 250 - 280 - 300	+3 to +9

Nylon 6 HS Blue Rod Tolerances

Nominal Diameter	Tolerance in mm
15	-0 to +0.25
20 - 25	-0 to +0.2
30 - 35 - 40	-0 to +0.75
45 - 50 - 56	+1 to +3
60 - 65 - 70 - 75 - 80 - 90 - 100	+1 to +4
110 - 120 - 125 - 130 - 140 - 150	+1.5 to +5
160 - 180 - 200	+2 to +7
230 - 250 - 300	+3 to +9

Nylon 66 Rod Tolerances

Nominal Diameter	Tolerance in mm
5 - 6	+0.1 to +0.4
8 - 10	+0.1 to +0.5
12 - 14 - 16 - 18 - 20	+0.2 to +0.7
22 - 25 - 28 - 30	+0.2 to +0.9
32 - 36 - 40	+0.2 to +1.1
45 - 50 - 56	+0.3 to +1.3
60 - 65 - 70	+0.3 to +1.6
75 - 80	+0.1 to +2.0
90	+0.5 to +2.2
100	+0.6 to +2.5
110	+0.7 to +3.0
120 - 125	+0.8 to +3.5
130 - 135 - 140	+0.9 to +3.8
150	+1.0 to +4.2
165 - 180	+1.2 to +5.0
200	+1.3 to +5.5
230 - 250	+1.5 to +6.2