What to send for quotation
Send the complete thread callout from the approved drawing, not just a diameter. If a thread detail is unresolved, mark it for confirmation so the quotation can separate a known requirement from an assumption.
Keep one thread system per order line
Identify the actual metric or inch thread reference on the drawing. Preserve the specified units and callout. Do not round an inch diameter into a metric designation or combine components because their sizes appear close.
Separate pitch from threaded length
Record diameter and pitch or threads per inch, then specify how far the thread extends. Identify a full-thread or partial-thread product by its governing drawing or standard. On a double-ended stud or rod, describe each end independently.
Name the required fit and mating part
Include the thread tolerance or fit class where specified. Identify the matching nut or tapped component and any special fit requirement. Send a drawing if the mating part is not a standard nut. A nominal diameter is not enough to confirm the fit.
Preserve direction and special geometry
Flag a left-hand thread, different threads at opposite ends, a shoulder, an unthreaded section or a drawing-defined end detail. Do not assume every end is identical. For tensioning hardware, include the complete end arrangement rather than a body-only size.
Review the finished condition
State the coating and whether fit is to be checked in the finished condition. Ask for confirmation of the inspection method and acceptance criteria where relevant. Do not prescribe an unapproved reworking method simply to make a coated assembly fit.
Order information checklist
This table lists quotation inputs, not guaranteed availability or engineering acceptance criteria.
| Requirement | Information to provide |
|---|---|
| Thread callout | System, nominal diameter and pitch or threads per inch |
| Tolerance | Specified fit / tolerance class and governing reference |
| Extent | Threaded length at each end and any smooth section |
| Direction | Right-hand / left-hand and any unlike ends |
| Mating component | Nut or tapped-part reference; finished fit requirements |
| Control | Drawing number, revision, units and required inspection |
Example enquiry brief
Replace each bracketed field with your approved requirements. Flag any unresolved item for review.
Drawing / revision: [reference]; product: [bolt / stud / rod / nut]; thread: [complete callout]; tolerance: [required class]; thread length and direction: [each end]; mating part: [reference]; finish: [requirement]; quantity: [by size]; unresolved details: [items needing confirmation].
Related products and guides
Scope of this checklist
This checklist describes the information to provide. It does not define thread tolerances or replace the drawing and applicable thread standards.