Blank Diameter & Chamfer Flat Dimensions for One Pass Grind & Roll COLD FORM or HOT THREAD ROLLING

CAUTION: Unable to Roll Parts With Cross Drill Holes or Milled Flats. Call for Information on parts with: thin wall, short threads or *high Heat-Treat. Now offering *HOT Rolling, on hard materials.

We process many other thread sizes including Metric Threads. We can roll standard or J-Form threads per your print requirements. Fillet Rolling services & Special thread dies available.

Blank Diameter and Chamfer Sizes for One Pass Grind before Thread Roll

Size	Series	Blank Diameter	Chamfer Flat
		PLUS 0.004	MINUS 0.010
0	80-NF	0.053	0.040
1	64-NC	0.064	0.045
	72-NF	0.065	0.050
2	56-NC	0.076	0.055
	64-NF	0.077	0.060
3	48-NC	0.087	0.065
	56-NF	0.089	0.070
4	40-NC	0.097	0.070
	48-NF	0.100	0.080
5	40-NC	0.110	0.085
	44-NF	0.112	0.090
6	32-NC	0.119	0.085
	40-NF	0.123	0.100
8	32-NC	0.145	0.115
	36-NF	0.147	0.120
10	24-NC	0.164	0.125
	32-NF	0.171	0.140
12	24-NC	0.190	0.145
	28-NF	0.195	0.155
	32-NEF	0.197	0.165
¼	20-NC	0.219	0.170
	28-NF	0.228	0.190
	32-NEF	0.231	0.200
	40-NEF	0.240	0.210
	56-NS	0.240	0.220
5/16	18-NC	0.278	0.225
	24-NF	0.287	0.245
	32-NEF	0.294	0.265
3/8	16-NC	0.336	0.275
	24-NF	0.350	0.310
	32-NEF	0.356	0.325
7/16	14-NC	0.393	0.320
	20-NF	0.407	0.355
	24-NS	0.412	0.370
1/2	13-NC	0.452	0.375
	20-NF	0.469	0.420
	40-NS	0.490	0.460
9/16	18-NF	0.530	0.470
5/8	11-NC	0.567	0.475
	18-NF	0.590	0.535
	24-NEF	0.600	0.555
3/4	10-NC	0.687	0.590
	16-NF	0.711	0.650
	18-NS	0.715	0.660
	20-NEF	0.719	0.670
7/8	9-NC	0.804	0.695
	14-NF	0.830	0.760
	16-N	0.836	0.775
1	8-NC	0.920	0.795
	12-NF	0.947	0.865
	14-NS	0.955	0.885
	18-NS	0.965	0.910
1-1/16	12-N	1.010	0.925
	18 NEF	1.028	0.970

Blanking Dimensions on Additional Sizes available, EMAIL your drawings