Specifications
- Material: carbon and alloy steel (stainless steel metric fasteners are in their own section)
- Strength: Class 8.8, 10.9 and 12.9 bolts and screws; Class 8 and 10 nuts
- Finishes: zinc plated, yellow zinc, plain, black oxide and black phosphate
- Sizes: M1.6 to M64, standard and fine pitch
Common Uses
- European and Asian cars, trucks and motorcycles
- Imported machinery and equipment repair
- Automation, robotics and 3D printers
- Bikes, appliances and electronics
FAQ
What does M10 x 1.5 mean?
M10 is the thread diameter in millimeters and 1.5 is the thread pitch, the distance in millimeters from one thread to the next. Standard (coarse) pitch is the most common; fine pitch has the threads closer together.
What do Class 8.8, 10.9 and 12.9 mean?
The first number x 100 is the minimum tensile strength in MPa, and the second number is the yield ratio. Class 8.8 is 800 MPa (about 116,000 psi), 10.9 is 1,040 MPa (about 150,000 psi) and 12.9 is 1,220 MPa (about 177,000 psi). Class 8.8 is often compared to SAE Grade 5 and 10.9 to Grade 8.
Are metric and inch fasteners interchangeable?
No. Close sizes such as M6 and 1/4" or M10 and 3/8" have different diameters and thread pitches and will cross thread. Use metric nuts and washers with metric bolts and screws.
What size wrench fits a metric bolt?
DIN sizes: M6 10mm, M8 13mm, M10 17mm, M12 19mm, M16 24mm, M20 30mm. ISO and JIS heads on M10, M12 and M14 are one size smaller (16mm, 18mm, 21mm). Flange bolts often use smaller wrench sizes too.
Related: Metric Nuts | Metric Washers | Metric Bolts | Metric Socket Head Cap Screws | Stainless Steel Metric Fasteners
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