What diameter is a 1/4 bolt?

Table B1 HEX BOLT DIMENSIONS
Bolt Size	A (max)	F Thread Length for Bolt Length
1/4″	0.260	0.750
5/16″	0.324	0.875
3/8″	0.388	1.000

What is a quarter 20 bolt?

So, for example, in the United States one might ask for a “2-inch hex-head quarter-twenty bolt,” which would be. 2 inches long, have a hexagonal head (to be turned by a wrench) have a nominal diameter of a quarter of an inch, and. have twenty threads to the inch.

What does 20 mean in bolt size?

Taking a closer look at this description, let’s explore its meaning: M = This designates the fastener is a metric size. 10 = The nominal diameter in millimeters. 1.0 = The thread pitch, or distance between threads, in millimeters. 20 = The fastener’s length, in millimeters.

What size head is a 1/4 inch bolt?

Hex Bolt Head Size Chart

Diameter	Head Size
1/4″	7/16″
5/16″	1/2″
3/8″	9/16″
7/16″	5/8″

What pitch is a 1/4 20 UNC bolt?

UNC Thread ANSI/ASME B1. 1

Nominal Diameter	Major Diameter Inch	Pitch mm
1/4″ – 20 UNC	0.250	1.270
5/16″ – 18 UNC	0.313	1.411
3/8″ – 16 UNC	0.375	1.587
7/16″ – 14 UNC	0.438	1.814

What do bolt size numbers mean?

The size of a metric bolt is specified using pitch, diameter, and length in millimeters. For example, in M8-1.0*20, the “M” means the Metric thread designation, the digit 8 refers to the Nominal diameter (in millimeters), 1.0 refers to the pitch, and 20 refers to the length.

What size bolt has a 1/2 head?

Hex Bolt, Lag Bolt, Square Bolt and Heavy Hex Bolt

US Bolts
Bolt Diameter (in)	Head and Wrench Size (in)
1/4	7/16 or 3/8
5/16	1/2
3/8	9/16

Is a #12 screw the same as 1 4?

Machine Screw Size Chart and Conversion Tables The diameters listed in the chart below are in fractions of an inch, so the #12 is just shy of 1/4 inch.

What diameter is a 1/4 bolt? Table B1 HEX BOLT DIMENSIONS Bolt Size A (max) F Thread Length for Bolt Length 1/4″ 0.260 0.750 5/16″ 0.324 0.875 3/8″ 0.388 1.000 What is a quarter 20 bolt? So, for example, in the United States one might ask for a “2-inch hex-head quarter-twenty bolt,” which would be.…