Top-Lock Distorted-Thread Locknut
Black-Oxide High-Strength Grade C Steel, 3/4"-16 Thread Size
Thread Direction | Right Hand |
Hex Nut Profile | Standard |
Distorted Thread Type | Top Lock |
Locking Type | Distorted Thread |
Fastener Strength Rating | High |
Finished Material | Black-Oxide Steel |
Thread Size | 3/4"-16 |
Width | 1 1/8" |
Height | 41/64" |
Fastener Strength Grade/Class | ASTM Grade C |
Drive Style | External Hex |
Nut Type | Hex, Locknut |
Performance | Vibration Resistant, High Strength |
System of Measurement | Inch |
Thread Fit | Unified Standard Class 2B |
Thread Spacing | Fine |
Thread Type | UNF |
Country of Origin | United States, Belgium, Canada, China, France, Germany, India, Indonesia, Italy, Japan, Malaysia, Mexico, Philippines, Poland, South Korea, Switzerland, Taiwan, Thailand, Vietnam |
DFARS Compliance | Not Specialty Metals Compliant |
Export Control Classification Number (ECCN) | EAR99 |
REACH Compliance | REACH (EC 1907/2006) (02/04/2026, 253 SVHC) Compliant |
RoHS Compliance | RoHS 3 (2015/863/EU) Compliant |
Schedule B Number | 731816.0000 |
U.S.–Mexico–Canada Agreement (USMCA) Qualifying | No |
Irregularly shaped threads at the top of these locknuts grip the screw for a stronger hold than nylon-insert locknuts. Although the threads prevent the nut from backing out due to vibration, they also increase the effort to install and remove. To get these nuts off, you may need special tools, such as an impact wrench or propane torch. Nuts are not reusable.
High-Strength Steel—Rated Grade 8, Grade C, or Class 10, these locknuts are about 25% stronger than medium-strength steel nuts. To avoid stripped threads during installation, make sure your screw has a comparable strength rating.
Black-Oxide Steel—Typically chosen for their appearance, these nuts have a dark, matte coating to create a finished look. They offer minimal corrosion resistance, so they're best for dry environments.
Fasten
The information in this 3-D model is provided for reference only.