17 · Thread run · shank on print
Partial-thread vs full-thread bolts on RFQ drawings
On stone cladding brackets, structural splices, and heavy baseplate joints, a length-only “hex bolt” line without thread style forces dual quotes. Partial-thread bolts keep an unthreaded shank under the head; full-thread bolts carry usable thread along most of the shank. Overseas buyers often say 半牙 / 全牙 — this desk locks which geometry the controlling revision owns before any unit price is useful. Dashitou does not publish DIN swap charts, “universal shank” rules, or list prices here.
Define · what this RFQ is for
Use this desk when overseas buyers quote Dashitou stone · structural · heavy fasteners and the print must choose partial thread vs full thread (unthreaded shank vs continuous thread) for grip, shear plane, or nut engagement. You own joint design and engineer sign-off; we confirm which thread style appears on the revision, diameter × length, grade / finish lock, and qty band against that revision.
Pair with structural bolt class & coating (G8) when class/finish sit with the thread callout, thread engagement vs grip (G11) when stack-up drives shank vs threaded length, flange bolts vs hex head (G12) when under-head style is open, cladding bracket slot vs hole (G5) when hole type changes bearing, and drawing handoff for revision lock. Then open Enquire / RFQ.
Discuss · fields that change the quote
Each row below is a desk check. Missing rows stay Open — we do not invent thread-length tables, DIN family swaps, or “半牙 OK anywhere” rules on this public page.
Field desk · 01–06
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Thread style (partial vs full) Name partial-thread (unthreaded shank under head · 半牙) vs full-thread (usable thread along shank · 全牙). Length-only “M12×80 hex bolt” invites dual quotes. Prefer the print’s named style or mark Open with a preference rule.
- Email example: Partial thread · unthreaded shank through plate stack (Rev C)
- If missing: Open — do not assume full thread from a stock photo
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Thread length / shank note Partial-thread prints often call out threaded length (b) and unthreaded shank. Full-thread may still need a usable-thread note when nuts stack deep. Write the note when the revision owns it; otherwise mark Open with a preference.
- Email example: b ≈ 36 mm thread · shank through 2×12 plate + washer
- If Open: mark preference on the print or RFQ notes
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Grip vs engagement split Grip (clamp stack through the joint) is not the same as nut/tap engagement. Partial thread puts unthreaded metal in the grip; full thread puts thread through the grip. Keep both lines — see G11.
- Email example: Grip = plate + washer; engagement ≥ 1×d into nut (Rev C)
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Grade / finish lock with the thread style Thread style does not replace grade or coating. Lock A2/A4 or property class + finish on the same revision — see G10 and G8. Stainless pairs may also need a galling note — see G14.
- Email example: Class 8.8 partial thread · A4 full-thread cladding zone · Zn flake Open
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Diameter × overall length Lock diameter × overall length with whether a washer sits under the head or nut. Changing from full to partial thread can move the nut face without changing overall length — write stack notes explicitly.
- Email example: M16 × 80 partial; washer under nut · dest EU
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Qty band & destination Mock-up joint set vs project lot; destination for packing notes. Discussion band is enough for the first reply.
- Email example: Qty band: mock-up 80 pcs → project lot TBD · dest EU
What must appear on the print
- Thread style named (partial-thread / 半牙 vs full-thread / 全牙)
- Thread length or shank note when grip / shear owns the choice
- Grip vs engagement split when stack-up is non-obvious
- Grade / finish lock with the mating nut — see A2 vs A4 coastal · structural class
- Controlling revision — see drawing handoff
Agree · before we number
Until the following are aligned, treat any figure as discussion only:
- Controlling revision locks partial vs full thread (or marks Open with a preference)
- No invented “DIN 931 ↔ 933 free swap” or site shank tables posted as policy here
- Class/coating (G8), engagement (G11), and flange vs hex (G12) notes settled or linked in the same thread when those desks apply
- Samples and private-label marking only after thread style, shank notes, and diameter × length are clear
We do not invent certificates, plant area, or ranking badges here. Project documents that matter to the RFQ are shared privately when relevant.
FAQ · partial vs full thread bolt
Is “hex bolt M12×80” on the BOM enough to quote partial or full thread?
Usually no. Partial-thread (unthreaded shank under the head) and full-thread bolts are different geometry conditions. Name the thread style on the controlling revision, or mark Open with a preference rule. Vague length-only language often forces a resubmit.
When should an RFQ lock partial thread instead of full thread?
When the print needs an unthreaded shank through the grip (shear plane, clamp stack, or sleeve fit) and only a defined threaded length for the nut. Do not swap full-thread stock for partial on this public desk without the print. Write shank / thread-length notes beside the callout.
Does choosing partial thread replace naming grip length or engagement?
No. Partial vs full thread is a shank / thread-run geometry choice. Grip through the joint and nut/tap engagement remain separate lines — see the engagement vs grip desk when stack-up is still open. Treat them independently on the RFQ and the print.
Can one RFQ mix partial-thread and full-thread zones?
Yes, when zones are explicit on the BOM (for example partial thread on heavy baseplate shear joints, full thread on short cladding brackets). Ambiguous “partial/full OK” without zone ownership often splits the quote. Lock zones or mark Open with a preference rule.
What should I send so Dashitou can review the thread-style line cleanly?
Open Enquire / RFQ, then email the PDF/STEP or marked sketch to shizhanhao6@gmail.com in one thread. Include partial vs full thread (or named standard family), thread length / shank note if relevant, A2/A4 or class/finish if relevant, diameter × length, qty band, and destination. Skim G8, G11, and G12 when those desks apply. No cart; no list prices on this site.
Next step
Skim structural bolt RFQ · engagement vs grip RFQ · flange vs hex RFQ · RFQ checklist, then open Enquire / RFQ. Direct email: shizhanhao6@gmail.com.