UNF – Unified National Fine 60°

Nominal Diameter	Major Diameter Inch	Major Diameter mm	Tapping Drill Size mm	TPI	Pitch mm
#0 - 80 UNF	0.060	1.524	1.25	80	0.317
#1 - 72 UNF	0.073	1.854	1.55	72	0.353
#2 - 64 UNF	0.086	2.184	1.90	64	0.397
#3 - 56 UNF	0.099	2.515	2.15	56	0.453
#4 - 48 UNF	0.112	2.845	2.40	48	0.529
#5 - 44 UNF	0.125	3.175	2.70	44	0.577
#6 - 40 UNF	0.138	3.505	2.95	40	0.635
#8 - 36 UNF	0.164	4.166	3.50	36	0.705
#10 - 32 UNF	0.190	4.826	4.10	32	0.794
#12 - 28 UNF	0.216	5.486	4.70	28	0.907
1/4" - 28 UNF	0.250	6.350	5.50	28	0.907
5/16" - 24 UNF	0.313	7.938	6.90	24	1.058
3/8" - 24 UNF	0.375	9.525	8.50	24	1.058
7/16" - 20 UNF	0.438	11.112	9.90	20	1.270
1/2" - 20 UNF	0.500	12.700	11.50	20	1.270
9/16" - 18 UNF	0.563	14.288	12.90	18	1.411
5/8" - 18 UNF	0.625	15.875	14.50	18	1.411
3/4" - 16 UNF	0.750	19.050	17.50	16	1.587
7/8" - 14 UNF	0.875	22.225	20.40	14	1.814
1" - 12 UNF	1.000	25.400	23.25	12	2.117
1 1/8" - 12 UNF	1.125	28.575	26.50	12	2.117
1 1/4" - 12 UNF	1.250	31.750	29.50	12	2.117
1 3/8" - 12 UNF	1.375	34.925	32.75	12	2.117
1 1/2" - 12 UNF	1.500	38.100	36.00	12	2.117

Feb 9, 2018

UNS – Unified Special 60°

Nominal Dia.	Major Dia.	Major Dia.	Tapping Drill Size	TPI	Pitch
#0-80	0.060	3/64	.046875	80	0.317
#1-72	0.073	#53	.0595	72	0.353
#2-64	0.086	#50	.07	64	0.397
#3-56	0.099	#45	.082	56	0.453
#4-48	0.112	#42	.0935	48	0.529
#5-44	0.125	#37	.104	44	0.577
#6-40	0.138	#33	.113	40	0.635
#8-36	0.164	#29	.136	36	0.705
#10-32	0.190	#21	.159	32	0.794
#12-28	0.216	#15	.18	28	0.907
1/4”-28	0.250	#3	.213	28	0.907
5/16”-24	0.313	I	.272	24	1.058
3/8”-24	0.375	Q	.332	24	1.058
7/16”-20	0.438	25/64	.390625	20	1.270
1/2”-20	0.500	29/64	.453125	20	1.270
9/16”-18	0.563	33/64	.515625	18	1.411
5/8”-18	0.625	37/64	.5625	18	1.411
3/4”-16	0.750	11/16	.6875	16	1.587
7/8”-14	0.875	13/16	.8125	14	1.814
1”-12	1.000	15/16	.90625	12	2.117
1-1/8”-12	1.125	1-3/64	1.046875	12	2.117
1-1/4”-12	1.250	1-11/64	1.171875	12	2.117
1-3/8”-12	1.375	1-19/64	1.296875	12	2.117
1-1/2”-12	1.500	1-27/64	1.421875	12	2.117

Feb 9, 2018

Nominal Dia.	Major Dia.	Major Dia.	Tapping Drill Size	TPI	Pitch
#1-64	0.073	#53	0.0595	64	0.397
#2-56	0.086	#50	0.07	56	0.453
#3-48	0.099	#47	0.0785	48	0.529
#4-40	0.112	#43	0.089	40	0.635
#5-40	0.125	#38	0.1015	40	0.635
#6-32	0.138	#36	0.1065	32	0.794
#8-32	0.164	#29	0.136	32	0.794
#10-24	0.19	#25	0.1495	24	1.058
#12-24	0.216	#17	0.173	24	1.058
1/4”-20	0.25	#7	0.201	20	1.27
5/16”-18	0.313	F	0.257	18	1.411
3/8”-16	0.375	5/16	0.3125	16	1.587
1/2”-13	0.5	27/64	0.421875	13	1.954
9/16”-12	0.563	31/64	0.484375	12	2.117
5/8”-11	0.625	17/32	0.53125	11	2.309
3/4”-10	0.75	41/64	0.640625	10	2.54
7/8”-9	0.875	49/64	0.765625	9	2.822
1”-8	1	7/8	0.875	8	3.175
1-1/8”-7	1.125	63/64	0.984375	7	3.628
1-1/4”-7	1.25	1-7/64	1.109375	7	3.628
1-1/2”-6	1.5	1-11/32	1.34375	6	4.233
1-3/4”-5	1.75	1-35/64	1.546875	5	5.08
2”-4.5	2	1-25/32	1.78125	4.5	5.644
2-1/4”-4.5	2.25	2-1/32	2.03125	4.5	5.644
2-1/2”-4	2.5	2-1/4	2.25	4	6.35
2-3/4”-4	2.75	2-1/2	2.5	4	6.35
3”-4	3	2-3/4	2.75	4	6.35
3-1/4”-4	3.25	3	3	4	6.35
3-1/2”-4	3.5	3-1/4	3.25	4	6.35
3-3/4”-4	3.75	3-1/2	3.5	4	6.35
4”-4	4	3-3/4	3.75	4	6.35