The M30 size of Turnbuckle is dimensioned by ISO / DIN. The table below gives the dimensional row from the standard, followed by the rated working load limit and the notes for safe installation.
Values are taken from the governing standard rather than from a general machine-thread table, because this type is not selected on one.
M30 Dimensional Row (ISO / DIN)
Thread size
Total length closed (mm)
Take-up length (mm)
Working load limit (kg)
Material
Reference standard
M30
420
320
3200
Drop-forged steel, hot-dip galvanized
DIN 1480 / GB/T 5973
Custom manufacturing · Made to drawing
Need turnbuckle in a size this table does not list?
This page covers M30 turnbuckle. Dimensions, material, finish and form are specified from the drawing — a rigging hardware outside the standard range is a variation on existing tooling rather than a new design. Made by hot forging.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
Customize the parameters below — every spec field is editable, and the drawing redraws to match the values you choose. Changing the size will snap the other fields to that size's standard values; you can then override any individual value.
Dimensioned line drawing of M30 Turnbuckle — ISO / DIN (Series 156). Side view and top view, drawn to the dimensions in the table below and redrawn for any size selected.
Total length closed (mm)
420
Take-up length (mm)
320
Working load limit (kg)
3200
Material
Drop-forged steel, hot-dip galvanized
Opens a short step to confirm the exact specification before you enter contact details.
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Click “Request this configuration” under the drawing to confirm the exact specification, then add your contact details. You can also send the request without a specification — but only an accurate selection gets an accurate quote.
Dimensions & Specifications (ISO / DIN)
Thread size
Total length closed (mm)
Take-up length (mm)
Working load limit (kg)
Material
Reference standard
M6
105
75
80
Drop-forged steel, hot-dip galvanized
DIN 1480 / GB/T 5973
M8
125
90
140
Drop-forged steel, hot-dip galvanized
DIN 1480 / GB/T 5973
M10
150
110
230
Drop-forged steel, hot-dip galvanized
DIN 1480 / GB/T 5973
M12
180
135
340
Drop-forged steel, hot-dip galvanized
DIN 1480 / GB/T 5973
M16
230
170
700
Drop-forged steel, hot-dip galvanized
DIN 1480 / GB/T 5973
M20
290
215
1200
Drop-forged steel, hot-dip galvanized
DIN 1480 / GB/T 5973
M24
355
260
1800
Drop-forged steel, hot-dip galvanized
DIN 1480 / GB/T 5973
M30
420
320
3200
Drop-forged steel, hot-dip galvanized
DIN 1480 / GB/T 5973
Materials & Grades
Select a material class to see the grades we supply it in. Each designation is listed with its ISO/EN, AISI/SAE, JIS and GB equivalents.
This part is cold-formed, threaded, heat-treated and finished in-house. The stages below are where its class and finish are actually decided.
01
Cold heading
Wire rod is drawn to size and cold-formed into blanks. Forming rather than cutting keeps the grain flow continuous around the head, which is where a bolt is most likely to fail.
Head dimensions and under-head radius checked at set-up and per shift.
02
Thread rolling
Threads are rolled between hardened dies rather than cut. Rolled threads are stronger in fatigue than cut threads and hold pitch and flank angle far more consistently across a batch.
Go / no-go ring gauges to ISO 965 tolerance class 6g.
03
Heat treatment
Quench-and-temper brings carbon and alloy steel to the property class ordered — 8.8, 10.9 or 12.9 — with the furnace charge tracked so a finished lot can be traced back to it.
Core hardness and tensile tested per lot to ISO 898-1.
04
Surface treatment
Zinc, zinc-nickel, hot-dip galvanizing, black oxide, phosphate and Dacromet, selected against the service environment rather than against the price list.
Coating thickness and neutral salt spray hours to ISO 9227.
Frequently Asked Questions
Should M30 Turnbuckle — ISO / DIN (Series 156) be tightened by torque or by angle?
For critical structural joints at M30, angle-controlled or stretch-controlled tightening is more repeatable than pure torque — the friction scatter at large diameters can dominate the torque signal.
What grip range is typical for M30 structural bolts?
Grip ranges are highly application-dependent at M30. As a guide, choose a length that gives at least 1× the thread diameter engagement in the nut plus 2–3 thread pitches projecting.
What is the coarse-thread pitch of M30 for Turnbuckle — ISO / DIN (Series 156)?
For M30 the standard coarse pitch is 3.5 mm — this is the value used for Turnbuckle — ISO / DIN (Series 156).
What clearance and tapping drill suit M30?
Use a 33 mm clearance hole (ISO 273 medium) for through-fixing, or a 26.5 mm tapping drill for a coarse M30 thread.
How do I request a quotation?
Use the technical drawing on this page to pick the exact configuration, then submit it with the quote form. We respond within one business day.
Need a fastener quote or a spec sheet?Message our engineers on WhatsApp — send a drawing or DIN number and get pricing back fast.Start WhatsApp Chat →
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