coach screw

English

coach screw (plural coach screws)

(hardware) A large metal wood screw with a hexagonal head.
- 1943 September and October, “Railway Construction and Operation at War Department Depots”, in Railway Magazine, page 263:
  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.
Synonym: lag screw

单词	coach screw
释义	coach screw English Noun coach screw (plural coach screws) (hardware) A large metal wood screw with a hexagonal head. 1943 September and October, “Railway Construction and Operation at War Department Depots”, in Railway Magazine, page 263: 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. Synonym: lag screw
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