Headlock™ Bolts eliminate the need for lock washers, Period. That's because each Headlock™ Bolt features 24 equally-spaced, stainless steel teeth serrations that bite into and hold onto the attaching surface–eliminating the need for lock-washers.
Mr Gasket HeadLock Locking Header Bolts
Part #: 2231G- Length: 1.5"
- Width: 4.1"
- Height: 5.7"
- Emissions Code: 5
- Prop 65: No