Cobalt Steel Drill Bit
5/16" Size





Material | Cobalt Steel |
Length Class | Jobbers |
Drill Bit Size | 5/16" |
Decimal Size Equivalent | 0.3125" |
Overall Length | 4 1/2" |
Maximum Drilling Depth | 2.7" |
Shank | |
Size | 5/16" |
Type | Round |
Drill Bit Point Type | Split |
Bit Style | Fluted |
Certification | Mil. Spec. |
Finish | Uncoated |
Flute Direction | Right Hand |
Flute Type | Spiral |
For Use On | Iron, Nickel, Stainless Steel, Steel, Tool Steel, Hardened Steel |
Military Specification | NAS907 Type J |
Number of Flutes | 2 |
Point Angle | 135° |
System of Measurement | Inch |
Country of Origin | United States |
DFARS Compliance | Specialty Metals COTS-Exempt |
Export Control Classification Number (ECCN) | EAR99 |
REACH Compliance | REACH (EC 1907/2006) (11/07/2024, 242 SVHC) Compliant |
RoHS Compliance | RoHS 3 (2015/863/EU) Compliant |
Schedule B Number | 820750.4030 |
U.S.–Mexico–Canada Agreement (USMCA) Qualifying | Yes |
Tough and wear resistant, cobalt steel bits last at least twice as long as high-speed steel. They can also run up to 25% faster at higher temperatures without being damaged on hard materials, such as nickel.
Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.
Uncoated—Polished to eject chips, these are also known as bright finish bits.
Align and center
Reduce friction
The information in this 3-D model is provided for reference only.
































