ASTM A194
Carbon, alloy and stainless steel nuts for high-pressure or high-temperature bolting
Covers carbon, alloy and stainless steel nuts for high-pressure or high-temperature bolting — grades 2H, 4, 7, 8 and 8M.
- Bolting
- ASME SA-194
- 3 grades in stock range
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What to know before ordering to ASTM A194
The points that decide whether material to ASTM A194 is accepted at inspection.
- 2H nuts are the standard match for B7 studs; 8M nuts match B8M.
- Heavy hex dimensions follow ASME B18.2.2.
- Nickel-alloy nuts are ordered to the alloy bar specification.
How ASTM A194 fits into an order
A purchase order line is only complete when it names the material standard, the dimensional standard and the inspection document. Miss one and the mill, the inspector and the buyer can each read the order differently.
ASTM A194 — questions buyers ask
What does ASTM A194 cover?
Covers carbon, alloy and stainless steel nuts for high-pressure or high-temperature bolting — grades 2H, 4, 7, 8 and 8M.
Which grades do you supply to ASTM A194?
SS 304, SS 304L, SS 316 / 316L — see the table on this page for the exact product and designation.
What is the difference between ASTM A194 and ASME SA-194?
ASME SA-194 is the ASME Boiler and Pressure Vessel Code (Section II) adoption of ASTM A194. The technical requirements are usually identical to a specific ASTM edition; pressure-equipment codes call for the ASME designation, and most mill certificates show both.
Do you supply certificates to this standard?
Yes. Material is supplied with mill test certificates to EN 10204 3.1 showing the standard, grade and heat number; 3.2 with third-party inspection on request.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026