Standard hex bolts can often move quickly when material and tooling are available. Semi-standard parts — including OEM spring hose clamps — may need tooling checks, trial production or extra inspection before release.
Custom stud bolts and flange bolts require more time for drawing review, material sourcing, sample production, heat treatment, coating and approval testing.
Buyers can shorten the timeline by confirming drawings, acceptance criteria, packaging and required certificates before sample production starts.
