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).
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.
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.
Hex key standard sizes. Hex keys are measured across-flats (AF), which is the distance between two opposite (parallel) flat sides of the key.
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.
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.
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|
Gauge to Millimeter Conversion Chart
|Self Tapping Screw Gauge (g)||Size (mm)|
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.
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.
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.
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.
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.
Approximate Equivalency Chart Metric/US Roughly Equivalent US Bolt Materials
|Metric Nut Class||SAE J429Normally Used||Grades|
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.
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.
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.
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.
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.
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|