This is a replacement USA made zinc-plated steel grease fitting Zerk used on RCLT HD Upper and Lower Control Arms.
Unlike most LT kits we've seen, we use straight fittings to reduce the chance of a rock snapping it off on the trail.
Requires a slotted or 90° right-angle grease coupler, such as this one (Amazon link).
Specs:
Thread: 1/4"-28
Shape: Straight
Hex Size: 5/16"
Overall height: 17/32"
Sold individually.
Eight are included with RCLT HD.