Q. Allen bolts are (Solved)
1. Self-screwing bolts
2. Self locking bolts
3. Counter sunk
4. Used on aircraft
5. Provided with hexagonal depression in head
- e. Provided with hexagonal depression in head
1. Self-screwing bolts
2. Self locking bolts
3. Counter sunk
4. Used on aircraft
5. Provided with hexagonal depression in head