Socket Head Screw with Flat Washer
Black-Oxide Alloy Steel, 1/4"-20 Thread Size, 1-1/2" Long
Thread | |
Size | 1/4"-20 |
Spacing | Coarse |
Type | UNC |
Fit | Unified Standard Class 3A |
Direction | Right Hand |
Socket Head Profile | Standard |
Fastener Head Type | Flanged, Socket |
Drive Style | Hex |
Washer | |
Type | Flat |
Material | Black-Oxide Steel |
Thickness | 1/16" |
OD | 1/2" |
Length | 1 1/2" |
Head | |
Diameter | 3/8" |
Height | 1/4" |
Threading | Fully Threaded |
Tensile Strength | 170,000 psi |
Drive Size | 3/16" |
Hardness | Rockwell C39 |
Material | Black-Oxide Alloy Steel |
Performance | High Strength |
Screw Size Decimal Equivalent | 0.25" |
Specifications Met | ASME B18.3, 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 | REACH (EC 1907/2006) (01/17/2023, 233 SVHC) Compliant |
RoHS Compliance | RoHS 3 (2015/863/EU) Compliant |
Schedule B Number | 731815.9000 |
U.S.–Mexico–Canada Agreement (USMCA) Qualifying | Yes |
Protect thin and soft surfaces from damage. A freely rotating washer sits between the head of these screws and your material to distribute pressure evenly. Made of alloy steel, these are some of our strongest screws. Their deep, six-point socket keeps hex keys 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.