UNC & UNF THREAD SIZE CHART

Download Your Own
Quick Reference Tap Size Chart

Download the UNC & UNF Thread Size Chart now to have a reliable reference for all your coarse and fine threading needs, enhancing your work's accuracy and efficiency.

TAP SIZE CHART

Tap Size	Diameter (in)	Diameter (mm)	Thread Count (TPI)	Thread Pitch (mm)	Tap Drill Size
#0000-160	0.0210	0.5334	160	0.159	1/64 in
#000-120	0.0320	0.8636	120	0.212	#71
#00-90	0.0470	1.1938	90	0.282	#65
#0-80	0.0600	1.5240	80	0.318	3/64 in
#1-64	0.0730	1.8542	64	0.397	#52
#1-72	0.0730	1.8542	72	0.353	#53
#2-56	0.0860	2.1844	56	0.454	#50
#2-64	0.0860	2.1844	64	0.397	#50
#3-48	0.0990	2.5146	48	0.529	#47
#3-56	0.0990	2.5146	56	0.454	#45
#4-40	0.1120	2.8448	40	0.635	#43
#4-48	0.1120	2.8448	48	0.529	#42
#5-40	0.1250	3.1750	40	0.635	#39
#5-44	0.1250	3.1750	44	0.577	#37
#6-32	0.1380	3.5052	32	0.794	#36
#6-40	0.1380	3.5052	40	0.635	#33
#8-32	0.1640	4.1656	32	0.794	#29
#8-36	0.1640	4.1656	36	0.706	#29
#10-32	0.1900	4.8260	32	0.794	#21
#10-24	0.1900	4.8260	24	1.058	#25
#12-24	0.2160	5.4864	24	1.058	#17
#12-28	0.2160	5.4864	28	0.907	#15
1/4-20	0.2500	6.3500	20	1.270	#7
1/4-28	0.2500	6.3500	28	0.907	#3
5/16-18	0.3125	7.9375	18	1.411	F
5/16-24	0.3125	7.9375	24	1.058	I
3/8-24	0.3750	9.5250	24	1.058	Q
3/8-16	0.3750	9.5250	16	1.588	5/16 in.
7/16-14	0.4375	11.1125	14	1.814	U
7/16-20	0.4375	11.1125	20	1.270	25/64 in.
1/2-20	0.5000	12.7000	20	1.270	29/64 in.
1/2-13	0.5000	12.7000	13	1.954	27/64 in.
9/16-18	0.5625	14.2875	18	1.411	33/64 in.
9/16-12	0.5625	14.2875	12	2.117	31/64 in.
5/8-18	0.6250	15.8750	18	1.411	37/64 in.
5/8-11	0.6250	15.8750	11	2.309	17/32 in.
3/4-16	0.7500	19.0500	16	1.588	11/16 in.
3/4-10	0.7500	19.0500	10	2.540	21/32 in.
7/8-9	0.8750	22.2250	9	2.822	49/64 in.
7/8-14	0.8750	22.2250	14	1.814	13/16 in.
1-14	1.0000	25.4000	14	1.814	15/16 in.
1-8	1.0000	25.4000	8	3.175	7/8 in.
1 1/8-12	1.1250	28.5750	12	2.117	1 3/64 in.
1 1/8-7	1.1250	28.5750	7	3.629	63/64 in.
1 1/4-12	1.2500	31.7500	12	2.117	1 11/64 in.
1 1/4-7	1.2500	31.7500	7	3.629	1 7/64 in.
1 1/2-12	1.5000	38.1000	12	2.117	1 27/64 in.
1 1/2-6	1.5000	38.1000	6	4.233	1 11/32 in.
1 3/4-12	1.7500	44.4500	12	2.117	1 43/64 in.
1 3/4-5	1.7500	44.4500	5	4.233	1 35/64 in.
2-12	2.0000	50.8000	12	2.117	1 59/64 in.
2-4 1/2	2.0000	50.8000	4.5	5.644	1 25/32 in.

Guides And White Papers

Want to learn more about Lexco’s wire rope specifications, or see
them in action yourself? Get started with some of our guides:

LINE
CARD

VIEW DOCUMENT

Discover an extensive range of cutting-edge products and components by exploring Lexco's impressive line card, designed to meet the diverse needs of nearly every industry.