Metric Grade 8.8 Hex Head Cap Screws

Metric Grade 8.8 Hex Head Cap Screws | The Nutty Company, Inc.

Metric Class 8.8 Hex Head Cap Screws

Zinc plated Class 8.8 metric hex head cap screws, the standard medium strength metric bolt. We stock full thread DIN 933 from M4 to M12 and partial thread DIN 931 in M5, M6, M8 and M12, plus a 152 piece metric hex head cap screw assortment. Choose a size below.

Specifications

Strength: Class 8.8, 800 MPa (about 116,000 psi) tensile
Standards: DIN 933 full thread, DIN 931 partial thread
Sizes: M4 to M12, standard pitch
Finish: zinc plated

DIN 933 / DIN 931


DIN 933 - Full Thread	DIN 931 - Partial Thread

Common Uses

Car and motorcycle repair
Machinery and equipment
General metric assembly

FAQ

What is the difference between DIN 933 and DIN 931?
DIN 933 hex cap screws are threaded all the way to the head (full thread, FT). DIN 931 have a plain shank under the head and are threaded only near the end (partial thread, PT). Use partial thread where the shank passes through a hole or takes a shear load.

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.

Do you sell a metric bolt assortment?
Yes. The 152 piece metric hex head cap screw assortment (KAMHC152) on this page covers popular sizes and lengths.

Free shipping on orders over $100, and orders placed before noon EST ship the same day. Purchase orders are accepted from government agencies, schools, hospitals, municipalities and companies with established credit with The Nutty Company, Inc.