Wood

**screw diameter**can be**measured**either as a shank**diameter**or a root**diameter**. The**measurement**is then cross referenced to a**size**number known as a wire gauge**size**. Thread**diameter**is used when**measuring**sheet metal**screws**. The**measurement**is then cross referenced to a**size**number known as a wire gauge**size**.What is m8 thread size?

Tap size | Basic major dia (mm) | Basic major dia (inch) |
---|---|---|

M6 x 1 | 6mm | .2362 |

M8 x 1.25 | 8mm | .3150 |

M8 x 1 | 8mm | .3150 |

M10 x 1.5 | 10mm | .3937 |

What is m6 size?

The "M" designation for metric screws indicates the nominal outer diameter of the screw, in millimeters (e.g., an M6 screw has a nominal outer diameter of

**6 millimeters**).1

## How is the size of a belt measured?

Lay the

**belt**on a clean, flat surface. Start the tape**measure**at the hole you use and**measure**to the end of the**belt**, where it meets the buckle.**Belts**are**measured**in inches and you should round to the nearest inch. If you**measure**36 inches, you will want to purchase a size 36**belt**.2

## How do you measure thread count?

**Thread count**or

**threads**per inch (TPI) is a

**measure**of the coarseness or fineness of fabric. It is

**measured**by

**counting**the number of

**threads**contained in one square inch of fabric or one square centimeter, including both the length (warp) and width (weft)

**threads**.

3

## How is an allen key measured?

**Hex key**standard sizes.

**Hex keys**are

**measured**across-flats (AF), which is the distance between two opposite (parallel) flat sides of the

**key**.

4

## How are screws sized?

Screws have three basic measurements: gauge, threads per inch, and shaft length in inches. So, you may also see a measurement like 6-

**32 x 1 1/2"**. This means it's a #6 diameter, with**32 threads**per inch (almost double the normal thread count as a standard wood screw) and an inch and a half long.5

## How do you measure a screen?

To determine filter size,

**measure**diagonally from one corner to the opposite diagonal corner. Be sure to**measure**only the viewable**screen**area. Do not include the dimensions of the**screen's**frame or casing.6

## What size is a 4mm screw?

Metric Imperial Screw Conversion Chart

Diameter (mm) | Length (mm) | Closest Imperial Size Gauge x Length |
---|---|---|

3.5mm | 40 | 6 x 1 1/2 |

4mm | 12 | 8 x 1/2 |

16 | 8 x 5/8 | |

20 | 8 x 3/4 |

7

## What size is an 8 gauge screw?

Gauge to Millimeter Conversion Chart

Self Tapping Screw Gauge (g) | Size (mm) |
---|---|

4 | 2.9 |

6 | 3.5 |

8 | 4.2 |

10 | 4.8 |

8

## How do you measure a screw?

For fasteners where the head usually sits above the surface, the

**measurement**is from directly under the head to the end of the fastener. For fasteners that are designed to be countersunk, the**measurement**is made from the point on the head where the surface of the material is, to the end of the fastener.9

## What is the tensile strength of a325 bolts?

Grade A325 bolts are available in diameters from 1/2 to 1-1/2 inch (for diameters greater than 1-1/2, ASTM A449 specifications should be considered) with a minimum tensile strength of

**120,000 PSI**. They also come in two types.10

## What is a grade a325 bolt?

Grade

**5**nuts are a finished hex pattern, and A194-2H or A563-DH heavy hex nuts are required for use with A325 bolts. Another difference is that Grade**5**bolts may be specified from 1/4″ diameter up to and including 1**-1/2**″ diameter. The A325 specification covers bolts from 1/2″ up to and including 1**-1/2**″ diameter.11

## What is the tensile strength of a Grade 8 bolt?

This means the tensile strength is

**120,000 lbs**per square inch. It also lists Grade 8's as 150 ksi fasteners meaning the tensile strength is**150,000 lbs**per square inch. Also, the ultimate shear strength of a fastener is typically about 60% of its ultimate tension strength.12

## Is a 10.9 Bolt stronger than Grade 8?

Also known as A-2 stainless, 18-

**8**is the most common**grade**of stainless steel for general use. A tempered medium carbon steel. Class**10.9**is**stronger than**class 8.8, and is commonly found in high strength automotive applications. Class**10.9**is similar to**grade 8**.13

## What is the metric equivalent of a Grade 8 bolt?

Approximate Equivalency Chart Metric/US Roughly Equivalent US Bolt Materials

Metric Nut Class | SAE J429Normally Used | Grades |
---|---|---|

8.8 | 8 | 5 |

9.8 | 9 | 5+ |

10.9 | 10or 12 | 8 |

12.9 | 10or 12 | . |

14

## What is a grade 8.8 bolt?

The first digit relates to the ultimate strength of the material, whilst the second is the ratio of yield stress to ultimate strength. Thus

**grade**4.6**bolts**have an ultimate material strength of 400N/mm2 and the uield (or proof) stress is 60% of the ultimate strength.15

## What does 12.9 mean on a bolt?

**12.9**grade steel

**means**that a component manufactured form this grade of steel has 12X100 N/mm^2 tensile strength and 9

**is**a multiplier

**means**90% of 1200 = 1080 N/mm^2

**is**the yield strength of the grade. Similarly we also have grade 8.8 , 10.9 , 6.8 also.

16

## What is stronger grade 5 or 8 bolt?

**Grade 8 bolts**have been hardened more than

**grade 5 bolts**. Thus they are

**stronger**and are used in demanding applications such as automotive suspensions.

**Grade 8 bolts**have 6 evenly spaced radial lines on the head.

**Grade**G is roughly equivalent to

**Grade 8**.

17

## What is a Grade 8 bolt?

A

**grade 8 bolt**is stronger than the more commonly used**grade**5. It is made of alloy steel and has six radial lines on the top of the**bolt**head.**Grade 8 bolts**have a tensile strength of 150,000 pounds per square inch.18

## What is a Grade 9 bolt?

**Grade 9**Hex Head. The

**Grade 9**Bolting system develops the highest clamp force available in a standard

**bolt**/nut assembly and it is frequently referred to by one of the folowing trade names: L9, PFC9, or F911. Special Alloy steels and heat treatments are used to achieve 180,000 psi tensile strength.

19

## What is the hardness of a Grade 8 bolt?

Materials - Medium Carbon Steel Bolts in SAE J429 (Grades 2, 5 and 8)

Grade | Nominal size, inches | Core hardness, Rockwell |
---|---|---|

2 | ¾ - 11/2 inch | B70 to B100 |

5 | ¼ - 1 inch | C25 to C34 |

1 - 1-1/2 inches | C19 to C30 | |

8 | ¼ - 1-1/2 inches | C33 to C39 |