Soldiers, if you’re replacing the safety chains on your M149-series water trailers, the chain can be purchased in bulk with NSN 4010-00-286-5645 for about $240. You’ll need to paint them prior to installation.
Bulk order safety chainThe safety hook, which includes a connection pin, comes with NSN 4030-01-501-6946 for about $79. The safety hook may also require painting before you attach it to the safety chain as shown below.
Left side shows hook prior to paint and right side shows painted hook attached to chain
You can get the detachable link with pin using NSN 4010-01-041-9751 for about $20. The detachable link is used to connect the safety chain to the eye bolt on the water trailer.
Detachable link connects safety
chain to water trailer eye bolt
Make sure the chain’s length, from the front tip of the safety hook to the end of the detachable link, is 50 inches (31 links of chain). This length allows the safety chains to catch the tongue of your trailer before it hits the ground if the tongue were to come off the trailer hitch (ball). If the safety chains are too long, the water trailer’s tongue can come off the trailer hitch (ball) and dig into the ground. That can lead to trailer damage and a safety risk for vehicle operators and others on the road.
Measure to ensure safety hook to detachable link is 50 inches
If you have any questions, contact your LAR.