The _____________ bolt is often made use of in gland and stuffing box arrangement in boiler mountings such as stop valve, feed-check valve etc.

The _____________ bolt is often made use of in gland and stuffing box

1.	The _____________ bolt is often made use of in gland and stuffing box arrangement in boiler mountings such as stop valve, feed-check valve etc.
A.	Headless tapered bolt
B.	Tap-bolt or cap screw
C.	T-headed bolt
D.	Countersunk-headed bolt
Answer» D. Countersunk-headed bolt