Asymmetrical Drive Button Head Screws
Tamper-Resistant, 1/4"-20 Thread, 3/4" Long
Thread | |
Size | 1/4"-20 |
Direction | Right Hand |
Spacing | Coarse |
Type | UNC |
Fit | Unified Standard Class 2A |
Tip Type | Flat |
Fastener Head Type | Rounded |
Head | |
Style | Button |
Profile | Standard |
Height | 0.132" |
Diameter | 0.437" |
Drive | |
Style | Asymmetrical |
Size | U25 |
Material | 18-8 Stainless Steel |
Length | 3/4" |
Threading | Fully Threaded |
Tensile Strength | 70,000 psi |
Specifications Met | ASME B18.3 |
Hardness | Rockwell B70 |
Performance | Corrosion Resistant, Tamper Resistant |
Screw Size Decimal Equivalent | 0.250" |
System of Measurement | Inch |
Country of Origin | United States |
DFARS Compliance | Specialty Metals Compliant (252.225-7008) |
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 |
Related Product |
These screws have a unique drive that's only available from McMaster-Carr. The drive, which has a security pin in it, only turns with an asymmetrical driver. Made of stainless steel, they won't rust or corrode when exposed to moisture and chemicals. The button head looks similar to a pan head, but it's lower and more compact, taking up less space.
Length is measured from under the head.
18-8 Stainless Steel—The choice for wet and outdoor environments, these screws won't rust. However, they don't hold up to the harsh chemicals that 316 stainless steel can.
The information in this 3-D model is provided for reference only.