What is the difference between a bolt and a stud, and when would each be used in naval applications?

• A. Bolt uses a nut and washers
• B. Studs are threaded to engage a tapped hole or nut on the other end
• C. Bolts are used only for assembly
• D. Bolt uses a nut and washers; studs are threaded to engage a tapped hole or nut on the other end; studs are used where one side is inaccessible or heat-treated

Answer: (D)

Understanding how each fastener creates a clamp helps you choose the right one for naval work. A bolt is a one-piece fastener with a head that passes through the holes in the parts and is tightened with a nut on the opposite side, usually with a washer to spread the load. This setup is ideal for joints you can reach from both sides and want to be able to disassemble relatively quickly.

A stud, on the other hand, is a threaded rod that is fixed into one component or threaded into a tapped hole, with a nut on the exposed end to draw the parts together. This means you don’t need access to the far side to tighten the joint. Studs are particularly useful when one side is inaccessible—such as through bulkheads or heavy piping connections—or when you’re dealing with heat-treated parts where you want to avoid disturbing threads on the opposite face.

So, use bolts for removable joints with accessible nut side; use studs where one side can’t be reached or when the design involves heat-treated components.