What size drill bit do you use for a 1/4 tap?

What size drill bit do you use for a 1/4 tap?

What Size Drill Bit for 1/4″ 20 Tap?

Screw Size	Drill Bit	Drill Bit Size
1/4″ 20 Tap	#7	13/64″
1/4″ 28 Tap	#3	7/32″

What is a 1/4 NPT thread?

NPT fittings are listed by the “standard” inner diameter (I.D.) of the fitting. (We put “standard” in quotes because the I.D. of the fitting will vary, depending on the manufacturer.) The outer diameter (O.D.) of the threads is usually about 1/4 (0.250) in.

What size is 1/4 NPT fitting?

NPT and NPTF pipe threads – dimensions according ANSI/ASME B1. 20.1/3.

NPT – American Standard Pipe Thread Taper 1)
Pipe Size (inches)	TPI	Nominal Outside Diameter Pipe OD (inches)
1/8″	27	0.405
1/4″	18	0.540
3/8″	18	0.675

What size is a 1 4 NPT?

Basic Dimensions, American National Standard Taper Pipe Threads, NPT, (ANSI B2. 1-1968)

Nominal Pipe Size	Outside Diameter of Pipe	Threads per Inch
1/8	0.405	27
1/4	0.540	18
3/8	0.675	18
1/2	0.840	14

What size hole do I drill for a 1/4 NPT tap?

7/16″
NPT Tap Drill Chart

Tap Size	Drill Size	Tap and Drill Set
1/4″ NPT Tap	7/16″ Drill Bit	1/4″ NPT Tap and Drill Set
3/8″ NPT Tap	37/64″ Drill Bit	3/8″ NPT Tap and Drill Set
1/2″ NPT Tap	23/32″ Drill Bit	1/2″ NPT Tap and Drill Set
3/4″ NPT Tap	59/64″ Drill Bit	3/4″ NPT Tap and Drill Set

What is NPT thread size?

NPT is defined by ANSI/ASME standard B1. 20.1. The taper rate for all NPT threads is 1 inch of diameter in 16 inches of length ( 3⁄4 inch per foot or 62.5 millimeters per meter) measured by the change of diameter (of the pipe thread) over distance of thread.

What size is a 1/4 NPT?

What is the OD of 1/4 NPT?

Basic Dimensions, American National Standard Taper Pipe Threads, NPT, (ANSI B2. 1-1968)

Nominal Pipe Size	Outside Diameter of Pipe	Height of Thread
1/4	0.540	0.04444
3/8	0.675	0.04444
1/2	0.840	0.05714
3/4	1.050	0.05714