Recommended Tolerances

"A1" High Precision
Size (inches)	Fixed	Closure	Size (mm)	Fixed	Closure
above   include			above   include
0.00 - 0.40	±  .004	±  .005	000 - 010	±   .10	±   .13
0.40 - 0.63	.005	.006	010 - 016	.13	.16
0.63 - 1.00	.006	.008	016 - 025	.16	.20
1.00 - 1.60	.008	.010	025 - 040	.20	.25
1.60 - 2.50	.010	.013	040 - 063	.25	.32
2.50 - 4.00	.013	.016	063 - 100	.32	.40
4.00 - 6.30	.016	.020	100 - 160	.40	.50
"A2" High Precision
Size (inches)	Fixed	Closure	Size (mm)	Fixed	Closure
above   include			above   include
0.00 - 0.40	±  .006	±  .008	000 - 010	±   .16	±   .20
0.40 - 0.63	.008	.010	010 - 016	.20	.25
0.63 - 1.00	.010	.013	016 - 025	.25	.32
1.00 - 1.60	.013	.016	025 - 040	.32	.40
1.60 - 2.50	.016	.020	040 - 063	.40	.50
2.50 - 4.00	.020	.025	063 - 100	.50	.63
4.00 - 6.30	.025	.032	100 - 160	.63	.80
6.30 & over - To find the fixed dimension tolerance multiply by 0.4%
"A3" HighPrecision
Size (inches)	Fixed	Closure	Size (mm)	Fixed	Closure
above   include			above   include
0.00 - 0.40	±  .008	±  .013	000 - 010	±   .20	±  0.32
0.40 - 0.63	.010	.016	010 - 016	.25	0.40
0.63 - 1.00	.013	.020	016 - 025	.32	0.50
1.00 - 1.60	.016	.025	025 - 040	.40	0.63
1.60 - 2.50	.020	.032	040 - 063	.50	0.80
2.50 - 4.00	.025	.040	063 - 100	.63	1.00
4.00 - 6.30	.032	.050	100 - 160	.80	1.25
6.30 & over - To find the fixed dimension tolerance multiply by 0.5%

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