Thread-Locking Button Head Hex Drive Screws
Alloy Steel, 1/4"-20 Thread, 1/2" Long



Locking Type | Threadlocker |
Thread | |
Size | 1/4"-20 |
Direction | Right Hand |
Spacing | Coarse |
Type | UNC |
Fit | Unified Standard Class 3A |
Tip Type | Flat |
Fastener Head Type | Rounded |
Head | |
Style | Button |
Profile | Standard |
Height | 0.132" |
Diameter | 0.437" |
Drive | |
Style | Hex |
Size | 5/32" |
Material | Black-Oxide Alloy Steel |
Length | 1/2" |
Threading | Fully Threaded |
Tensile Strength | 120,000 psi |
Threadlocker Type | Nylon Patch |
Threadlocker Temperature Range | -70° F to 250° F |
Specifications Met | ASME B18.3, ASTM F835 |
Military Specification | MIL-DTL-18240 |
Certification | Mil. Spec. |
Hardness | Rockwell C39 |
Performance | High Strength, Vibration Resistant |
Screw Size Decimal Equivalent | 0.250" |
System of Measurement | Inch |
Country of Origin | China, India, Taiwan, United States |
DFARS Compliance | Not Specialty Metals Compliant |
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 | 731815.9000 |
U.S.–Mexico–Canada Agreement (USMCA) Qualifying | No |
Lock parts in place on machinery that experiences mild vibration with these strong and vibration-resistant screws. Made of alloy steel, they have nearly twice the tensile strength of other thread-locking options. With a nylon-patch threadlocker bonded to the threads, they save you the time and mess of adding it yourself. The button head looks similar to a pan head, but it's lower and more compact, taking up less space. With six contact points, the hex drive withstands more torque than slotted and Phillips to securely grip your driver.
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.
Military Specification—These screws are manufactured and tested to meet strict U.S. military standards for material and construction.
The information in this 3-D model is provided for reference only.

























