# What diameter is a 1/4 bolt?

## 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 are the dimensions of a 1/4 20 bolt?

Size Nominal (Major) Diameter [in] Coarse Thread (UNC)
1/4″ 0.2500 20
5/16″ 0.3125 18
3/8″ 0.3750 16

Is M6 the same as 1/4 inch?

When you look at fine M14-1.5 and 9/16-18 fasteners, however, the 9/16-18 is finer—it has more threads per inch. But the M3….Table 3.

Metric Closest Inch
M6-1.0 1/4-28 (Larger)
M7-1.0 1/4-28 (Smaller)
M8-1.25 5/16-18 (Smaller)
M10-1.5 3/8-16 (Smaller)

### What size bolt is 1/4 head?

US Bolt Head/Wrench Size

Bolt Diameter Head and Wrench Size
Hex Bolt – Lag Bolt – Square Bolt Heavy Hex Bolt
1″ 1-1/2″ 1-5/8″
1-1/8″ 1-11/16″ 1-3/4″
1-1/4″ 1-7/8″ 2″

### What is the diameter of a 1 inch bolt?

Heavy Hex Bolt Dimensions

Bolt Diameter D F
Body Diameter Width Across Flats
7/8 0.895 1.438
1 1.022 1.625
1-1/8 1.149 1.812

Which is bigger 6mm or 1/4 inch?

6mm = almost 1/4 inch. 7mm = almost 9/32 inch (= a bit over 1/4 inch) 8mm = 5/16 inch. 9mm = almost 3/8 inch.

#### What size head does an M12 bolt have?

Dimensions for DIN931 Hex Head Bolt

Diameter (d) Pitch Across Flats (s)
M8 1.25mm 13mm
M10 1.5mm 17mm
M12 1.75mm 19mm
M14 2mm 22mm

#### What is the length of the bolt?

Length is measured from under the head 3/8” 3/8” – 16 US Hex Bolt Sizes and Thread Pitches (continued)

What is the size of a hex bolt?

US Bolt Head/Wrench Size Bolt Diameter Head and Wrench Size Head and Wrench Size Hex Bolt – Lag Bolt – Square Bolt Heavy Hex Bolt #6 1/4″ – #8 1/4″ – #10 5/16″ –

## What is the size of a US bolt head?

US Bolt Head/Wrench Size Bolt Diameter Head and Wrench Size Head and Wrench Size 9/16″ 13/16″ – 5/8″ 15/16″ 1-1/16″ 3/4″ 1-1/8″ 1-1/4″ 7/8″ 1-5/16″ 1-7/16″

## How do I find the nominal thread length of inch-series bolts?

Per ASME B18.2.1, the nominal thread length of inch-series bolts can be found by: where L is the total bolt length and d nom is the nominal bolt diameter. The following table of hex bolt head dimensions was adapted from ASME B18.6.3, Table 29, “Dimensions of Plain (Unslotted) and Slotted Regular and Large Hex Head Screws.”