What is a m8 bolt in inches?
Inch Threads vs. Metric Threads
|Inch Bolts||Metric Nuts|
|5/16″-18||M8 x 1.0|
|3/8″-16||M10 x 1.5|
|7/16″-14||M12 x 1.75|
|1/2″-13||M14 x 2|
|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|
- The M8 will measure about 8 mm in diameter, more likely, just a touch undersize, (.31496") The M10, about 10 mm in diameter, (.3937") and the M12 about 12 mm in diameter, (.4724"). The "M" designates the bolt is Metric and the number after the M indicates the size. The number after that is the length.
- The M3 is a metric screw specifying a nominal diameter of 3 millimetres (0.12 in); and standard coarse thread pitch defined as 0.5 millimetres (0.020 in). The M3 is the second most common screw found in PCs. It commonly appears in many lengths from 1-20mm.
- US Machine Screw Diameters
Size Thread Diameter Decimal Nearest Fractional #6 0.13" 9/64" #8 0.16" 5/32" #10 0.19" 3/16"
Diameter is in either Inches ( not decimal ) or Millimeter. Second measure the pitch Pitch is threads / per unit. Inches are measured threads per inches. Third measure length Length is measured from behind the head to end, ( except for flathead is measured total length ) .
- Wood Screw, Sheet Metal Screw, Hex Bolt, Lag Bolt, etc. Fasteners in some categories are available with different drive types such as Philips or Slotted. In other categories such as lag bolts there is either only one drive type or the drive type is implied to be of a standard type.
- Metric fasteners are specified with a thread pitch instead of a thread count. The thread pitch is the distance between threads expressed in millimeters (measured along the length of the fastener). For example a thread pitch of 1.5 means that the distance between one thread and the next is 1.5mm.
- 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.
If you have ever looked a metric hex bolt you might notice the markings 8.8, 10.9 or 12.9 this does not mean grade 8,10 or 12. The grade 8.8 refers to the tensile strength which is generally 116,000 psi, grade 10.9 is generally 150,000 and grade 12.9 is generally 175,000 psi.
- Our metric grade 10.9 bolts meet ASTM A324 grade BD and SAE J429, grade 8 standards. The yield strength of the bolts is 940 and the tensile strength is 1040 MPa. U-Bolt-It is a leading distributor and manufacturer of high quality metric grade 10.9 bolts.
- Bolt Grade Markings and Strength Chart
Grade and Material Mechanical Properties Proof Load (psi) Class 8.8 Medium carbon steel, quenched and tempered 600 Class 10.9 Alloy steel, quenched and tempered 830 Class 12.9 Alloy steel, quenched and tempered 970
- To Determine the Size of a Bolt. First measure the diameter. Diameter is in either Inches ( not decimal ) or Millimeter. Second measure the pitch Pitch is threads / per unit. Inches are measured threads per inches.
Updated: 2nd October 2019