coach screw

noun

coach screw

noun

1

Business, Carpentry, Construction, Manufacturing Commonwealth, Ireland, UK A large metal wood screw with a head that takes a spanner.

In turnouts the special fittings are secured by coach screws. Portable air compressors with special tools for boring holes and driving the coach screws save both time and labour.1943 September and October, “Railway Construction and Operation at War Department Depots”, in Railway Magazine, page 263:

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