DIN 975
Threaded Rod
1 m and 3 m threaded rod in class 4.8 or 8.8, cut square and chamfered for easy nut starting.
From
$0.66/pc
at 20,000 pcs
Specs
Family · Studs & threaded rod
Threaded rod, stud bolts and double-end studs.
Rod and studs are rolled 6g, chamfered and supplied to ASTM A193 B7/B7M with A194 2H nuts, or in 4.8 / 8.8 carbon steel and A2/A4 for general use. Rolled thread, not cut, unless the length forces it.
Specify it once
What to put on the drawing or the PO.
The four lines below decide whether the parts fit, hold and survive. Nine quoting delays out of ten are one of them missing.
- Both ends threaded (double-end stud) or full length, and the thread length at each end for a flanged joint.
- Material specification with the service temperature: A193 B7 to about 450 °C, A320 L7 for low-temperature service to −101 °C.
- Coating: B7 is normally supplied plain, oiled or hot-dip galvanized to ASTM A153 — plating a B7 stud changes its hydrogen risk.
- Straightness and end chamfer, if the stud is fed through a flange or an automated tool.
Where it goes wrong
Mistakes we see on incoming drawings.
We will flag these before production rather than after the first inspection. If a mistake is already in the drawing, we say so in writing on the quote.
- Using B7 above its temperature limit instead of stepping to B16 or a different alloy.
- Cutting thread on a pressure-joint stud to save time, which removes the work-hardened surface and the fatigue resistance with it.
- Hot-dip galvanizing rod without chasing the thread, so the nut will not run on site.
Common questions
Studs & threaded rod — answered before you ask.
Something not covered? Email matrixgrowth@foxmail.com and a person answers, usually inside a shift.
A193 B7 or A320 L7?
B7 for elevated-temperature service to roughly 450 °C; L7 is the low-temperature variant, impact-tested to −101 °C. Same dimensions, different heat treatment and testing.
Do you cut or roll the thread on rod?
Rolled, because rolling work-hardens the thread root and leaves a better surface. Cut thread is only used where the length or the end condition makes rolling impossible, and we mark it on the quote.
What is the longest length in one piece?
3 m in one piece is standard; longer runs are supplied as coupled assemblies with the coupling identified on the packing list.
Other families
What else leaves the same plant.
Next step
Send the standard number and the quantity.
You get unit price, MOQ, pack multiple, lead time and the Incoterm you buy on — within one business day, with the HS code for your broker.