Black-Oxide Alloy Steel Socket Head Screw
5/16"-18 Thread Size, 1-1/4" Long
Thread | |
Size | 5/16"-18 |
Spacing | Coarse |
Type | UNC |
Fit | Unified Standard Class 3A |
Direction | Right Hand |
Socket Head Profile | Standard |
Fastener Head Type | Socket |
Drive Style | Hex |
Length | 1 1/4" |
Head | |
Diameter | 15/32" |
Height | 5/16" |
Threading | Fully Threaded |
Tensile Strength | 170,000 psi |
Drive Size | 1/4" |
Hardness | Rockwell C37 |
Material | Black-Oxide Alloy Steel |
Performance | High Strength |
Screw Size Decimal Equivalent | 0.3125" |
Specifications Met | ASTM A574 |
System of Measurement | Inch |
Tip Type | Flat |
Country of Origin | United States |
DFARS Compliance | Specialty Metals Compliant (252.225-7009) |
Export Control Classification Number (ECCN) | EAR99 |
REACH Compliance | Not Compliant |
RoHS Compliance | RoHS 3 (2015/863/EU) Compliant |
Schedule B Number | 731815.9000 |
U.S.–Mexico–Canada Agreement (USMCA) Qualifying | Yes |
Made of alloy steel, these screws are the standard for high-strength fastening. Use them in high-load applications such as dies, presses, and heavy equipment. The deep, six-point socket keeps the hex key from slipping out and damaging the drive.
Length is measured from under the head.
Black-Oxide Alloy Steel—Typically chosen for their appearance, these screws have a dark, matte coating to create a finished look. They offer minimal corrosion resistance, so they're best for dry environments.
The information in this 3-D model is provided for reference only.