ASTM A194/A194M

ASTM A194 — Nuts for pressure and temperature service

Nuts associated with bolting enquiries for high pressure and/or temperature service. Pairing depends on grade and service requirements.

Send your specification

Which A194 nut?

GradeMaterial familyCharacteristic
2HQuenched and tempered carbon steelNut for pressure / temperature service
2HMQuenched and tempered carbon steelSpecific hardness requirements
7 / 7MQuenched and tempered alloy steelSeparate grades; specify required tests
8Type 304 stainless steelSpecify condition and marking
8MType 316 stainless steelSpecify condition and marking

Matching bolts and studs

Examples to check against the specification: A193 B7 with 2H; B8 with 8; B8M with 8M. For Class 2, specify any supplementary nut requirements. Establish the temperature rating for the entire joint, not from the nut designation alone.

Specify the nut alongside the bolting

State the nut grade, material, thread and finish. Any supplementary tests must be included in the enquiry and supply documentation.

Dueemme technical sheet

Download technical PDF ↓

Project-specific documentation

Assembly and traceability

Lot, markings, component list and conformity documents relevant to the supply.

EN 10204 3.1 · DoP · CoC

State the required documents. Applicability and availability are confirmed during enquiry review.

Testing and coatings

Dimensional reports, mechanical tests, coating reports and ROCAP where applicable to the specification.

Application sectors

Industrial and EPC projects, according to the specified application.

Dueemme industries →
RFQ / B2B

Have a structural or ASTM specification?

Build your enquiry. In the next step, add your contact details and attach the specification, bill of materials or drawing.

Required documentation
Dueemme Sidol
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