Standard DTI FAQs
Thread Condition shows some necking down
- Thread Condition shows some necking down
- You break some bolts before their DTI's have been compressed sufficiently.
See breaking bolts
- Your DTI's have been completely flattened so that not even a .005"
feeler gage can be inserted. Is thi OK? See failure
or stripping of bolts
- You are compressing the DTO's OK but you think you are 'overtensioning' your bolts. What should you do? See condition of bolt threads
Thread Condition shows some necking down
Some "necking" of bolts always occurs in the first few threads. ASTM A325 (clause 6.3.3.4) states that "...elongation...is to be expected...and is not to be classified as a failure." Bolts will provide the correct clamping force even if they are stretched.
