Question: What size socket fits a 3/8 bolt?

What size socket is my nut?

How to Determine the Right Size Socket for a Nut

  1. Turn on the digital caliper and set it to read in inches, not millimeters. …
  2. Close the caliper jaws until each jaw rests on one flat side of the nut on opposite sides.
  3. Check the caliper display. …
  4. Turn on the digital caliper and set it to read in millimeters, not inches.

How do you measure bolt socket size?


  1. Insert the shank of the bolt into the holes in a bolt-sizing gauge. …
  2. Locate the printed bolt size to the side of the correct hole on the gauge (for example, 1/2, 3/4 or in mm for metric bolts).
  3. Locate the socket head in the socket set that has this size printed on its side.

What size head is on a 3/4 bolt?

Hex Bolt Head Size Chart

Diameter Head Size
9/16″ 13/16″
5/8″ 15/16″
3/4″ 1 1/8″
7/8″ 1 5/16″

How do you measure bolt and nut size?

How to Measure Nuts & Bolts

  1. Place the head of a bolt or a nut into a nut and bolt gauge. …
  2. Measure the shank length of the bolt from the bottom of the head (where it meets the shank) to the bottom of the bolt, using a measuring tape to determine its overall length. …
  3. Place the shank of the bolt into the bolt width gauge.
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How do I know if my nut is metric or standard?

How long is that bolt? Most bolts come in pretty uniform lengths; and this is a good way to determine if the bolt is metric or standard. Measure the bolt length (not including the cap), and see if it’s closer to a fraction of an inch, or a nice and round millimeter length that ends in 5 or 0.

What size wrench fits a 3/8 bolt?

US Bolt Head/Wrench Size

Bolt Diameter Head and Wrench Size
Hex Bolt – Lag Bolt – Square Bolt Heavy Hex Bolt
3/8″ 9/16″
7/16″ 5/8″
1/2″ 3/4″ 7/8″

What are the standard socket sizes in order?

Six Point Standard Sockets (3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8, 15/16, 1) Six Point Metric Sockets (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21) Six Point Standard Deep Sockets (1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8, 15/16, 1)

Is M10 same as 10mm?

If the size is M10 x 25, that would mean that the diameter is 10 mm. … The 25 indicated a length of 25 mm. A matching nut would be labeled M10, which also doesn’t require a thread pitch since it’s a course thread fastener.

What size socket fits a 3/8 nut?

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

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

What is the torque on a 3/8 bolt?

ASTM A449 / SAE Grade 5*

Bolt Size TPI Tightening Torque (ft lbs)
516 18 17
38 16 31
716 14 49
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What size is a #8 bolt?

American Screw Sizes

Size Nearest Fraction Inch
#6 9/64 0.13
#8 5/32 0.16
#10 3/16 0.19

What is the standard bolt size?

US Standard Thread Length for Bolts

Bolt Diameter Standard Thread Length (in.) *
Bolts 6 inches and shorter Bolts longer than 6 inches
5/8″ 1-1/2″ 1-3/4″
3/4″ 1-3/4″ 2″
7/8″ 2″ 2-1/4″