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العربية ASTM A194 2H heavy hex nuts supplier
XZ Fastener supplies ASTM A194 2H heavy hex nuts for flange bolting, pressure piping, valves, petrochemical equipment, power plants, and industrial maintenance programs. ASTM A194 Grade 2H nuts are commonly matched with ASTM A193 B7 stud bolts where higher proof strength, heat treatment, traceability, and reliable thread fit are required. Supply can include inch heavy hex nuts, metric heavy hex nuts according to drawing, plain black, zinc plated, hot dip galvanized, PTFE coated, phosphate, and other finishes upon request. Buyers can also combine these nuts with ASTM A193 B7 stud bolts for complete bolting sets.
Quick Specs
What Buyers Should Know Before Sourcing ASTM A194 2H Heavy Hex Nuts
ASTM A194 Grade 2H is a material and mechanical requirement for heavy hex nuts used in high-pressure and high-temperature bolting service. Buyers should confirm both the A194 grade and the dimensional reference, such as ASME B18.2.2, project drawing, or an approved flange bolting schedule.
For flange sets, ASTM A194 2H nuts are commonly paired with B7 studs, often with two nuts per stud. Thread series, coating thickness, nut run-on, marking, and certificate requirements should be defined before production. For practical matching details, review XZ Fastener guidance on stud bolts for pipeline flanges.
Important Sourcing Checks
- Confirm ASTM A194 Grade 2H and heavy hex nut dimension reference.
- Specify thread size, thread series, pitch, and class of fit.
- Confirm matching ASTM A193 B7 studs, B16 studs, or other bolting grade.
- Check coating thickness, oversize tapping, and nut run-on before production.
- Define MTC, heat number traceability, marking, packing, and third-party inspection needs.
Common Purchasing Descriptions
- ASTM A194 2H heavy hex nuts, plain black finish, ASME dimensions
- A194 Grade 2H heavy hex nuts with ASTM A193 B7 stud bolts
- ASTM A194 2H nuts, 8UN thread, PTFE coated, two nuts per stud
- Hot dip galvanized A194 2H heavy hex nuts with matching galvanized studs
- Heavy hex nuts for flange bolting sets, pressure piping, and valve service
- ASTM A194 2H nut sets with inspection report and MTC available upon request
- Mixed fastener orders with Grade 8.8 carbon steel hex bolts and metric hex head bolts
- Project packages including zinc plated DIN 933 bolts, black oxide DIN 933 bolts, and hot dip galvanized DIN 933 bolts
For wider purchasing programs, buyers can review XZ Fastener fastener products to combine heavy hex nuts with stud bolts, washers, threaded rods, hex bolts, anchors, and custom fasteners.
Detailed Specifications Table
| Artículo | Available Specification | Buyer Notes |
|---|---|---|
| Product Name | ASTM A194 2H heavy hex nuts | Commonly used with high-strength stud bolts for pressure service and flange bolting. |
| Material Standard | ASTM A194 Grade 2H | Heat-treated high-strength nut grade; chemical and mechanical data can be provided when required. |
| Dimension Reference | ASME B18.2.2, project drawing, or buyer specification | ASTM A194 controls material and mechanical properties; dimensions must be specified separately. |
| Thread Options | UNC, UNF, 8UN, metric thread, custom thread upon request | Send thread series and fit clearly, especially for flange stud orders. |
| Matching Bolting | ASTM A193 B7, B16, and other project bolting grades | Two nuts per stud are common for flange sets; confirm quantity ratio before packing. |
| Finish | Plain, black, zinc plated, hot dip galvanized, PTFE, phosphate, zinc flake, custom coating | Coating thickness and oversize tapping should be reviewed before production. |
| Inspection | Dimension, thread, hardness, proof load where applicable, coating, marking, MTC | Inspection reports and third-party inspection can be discussed before order confirmation. |
| Packing | Carton, woven bag, wooden case, pallet, nut-set packing, buyer label | Export packing can be arranged according to size, weight, coating, and destination. |
Material and Grade Explanation
ASTM A194 Grade 2H heavy hex nuts are designed for use with high-strength bolting in pressure and temperature service. The grade is commonly specified with ASTM A193 Grade B7 stud bolts, especially for pipeline flanges, pressure vessels, petrochemical plants, valves, and maintenance shutdown projects.
Procurement teams should distinguish A194 2H nuts from ordinary hex nuts. ISO 4032 or DIN 934 nuts may be suitable for many metric assemblies, while A194 2H is selected where the project requires a specific ASTM grade, heavy hex dimensions, heat treatment, marking, and traceability. To review certificate data, see the guide on MTC for bolts and nuts.
Typical Flange Set Details
- Stud material: ASTM A193 Grade B7 when specified.
- Nut material: ASTM A194 Grade 2H.
- Thread series: often UNC or 8UN in many flange applications.
- Nut quantity: commonly two nuts per stud for flange sets.
- Documents: MTC, heat number, inspection report, coating report upon request.
For bolting pair selection, review nut grade and bolt torque matching rules.
Surface Finish Selection Guide
Plain or Black Finish
Plain or black A194 2H heavy hex nuts are common for many industrial flange applications. Rust-preventive oil and suitable packing should be confirmed when sea shipment or long storage is expected.
PTFE Coating
PTFE-coated 2H nuts are often requested with B7 stud bolts where lower friction, color identification, or added corrosion protection is required. Coating thickness and thread fit must be confirmed.
Galvanized or Zinc Coated
Zinc plated or hot dip galvanized finishes can be supplied according to order requirement. For coated heavy hex nuts, tapping allowance and mating stud fit should be reviewed before bulk order.
For coating selection, review the PTFE coating guide for stud bolts and nuts and the broader fastener coating guide.
Manufacturing and Quality Control
ASTM A194 2H heavy hex nut production requires control of raw material, forging or machining, tapping, heat treatment, surface finishing, marking, sorting, and packing. Important inspection points include thread size, thread fit, across flats, nut height, chamfer, hardness, proof load where applicable, coating thickness, nut run-on with mating studs, and marking accuracy.
For pressure-related projects, buyers often request material test certificates, chemical and mechanical data, hardness results, dimensional reports, coating records, and third-party inspection. To reduce specification gaps, use XZ Fastener’s quality inspection RFQ checklist before placing a controlled order.
Aplicaciones
- Pipeline flange connections, valve connections, and pressure piping systems
- Petrochemical plants, refineries, chemical equipment, and power plants
- Heat exchangers, pressure vessels, pump assemblies, and compressor equipment
- Maintenance shutdowns, spare part programs, and industrial fastener stock
- ASTM A193 B7 stud bolt sets with two ASTM A194 2H nuts per stud
- Plain black, PTFE-coated, zinc plated, or galvanized flange bolting packages
- Heavy hex nut stock for oil and gas, chemical, and power generation projects
- Mixed fastener projects including metric hex head bolts, washers, and custom parts
For related stud and nut planning, buyers can review stud bolt size, length, thread, and nut requirements.
How to Get a Faster Quotation
To receive a faster quotation for ASTM A194 2H heavy hex nuts, send thread size, thread series, quantity, finish, coating thickness requirement, mating stud grade, nut marking requirement, packing method, delivery destination, and inspection requirement. If the order is for flange sets, include the stud diameter, stud length, pressure class, nut quantity per stud, washer requirement if any, and required documentation.
You can send your purchase list through the request a quote page together with drawings, material certificates required, packing labels, or third-party inspection requirements.
Preguntas frecuentes
What are ASTM A194 2H heavy hex nuts used for?
ASTM A194 2H heavy hex nuts are commonly used for pressure piping, pipeline flanges, valves, heat exchangers, pressure vessels, petrochemical equipment, and power plant bolting assemblies.
Which stud bolts are commonly paired with ASTM A194 2H nuts?
ASTM A193 Grade B7 stud bolts are commonly paired with ASTM A194 Grade 2H heavy hex nuts. Buyers should confirm whether two nuts per stud are required for flange bolting sets.
Does ASTM A194 define the heavy hex nut dimensions?
ASTM A194 mainly defines material and mechanical property requirements. Heavy hex nut dimensions should be specified by ASME B18.2.2, project drawings, or buyer requirements.
Can ASTM A194 2H nuts be supplied with PTFE coating?
Yes. PTFE-coated ASTM A194 2H nuts can be supplied with matching coated studs according to order requirement. Coating thickness, color, friction requirement, and thread fit should be confirmed before production.
What documents are usually requested for A194 2H heavy hex nuts?
Common documents include material test certificates, chemical and mechanical data, heat number traceability, hardness records, dimensional inspection reports, coating reports, and third-party inspection reports when required.
What information is needed for an A194 2H nut quotation?
Please provide thread size, thread series, material grade, finish, quantity, mating stud grade, packaging method, destination, marking requirement, and inspection requirements. Drawings or flange bolting schedules are helpful for project orders.
Send Your ASTM A194 2H Heavy Hex Nut Inquiry
For a faster and more accurate offer, send your size list, finish, quantity, packaging method, and inspection requirements. XZ Fastener can quote ASTM A194 2H heavy hex nuts together with matching ASTM A193 stud bolts, washers, threaded rods, hex bolts, and related fastener products according to your purchasing plan.
Send Size List and Requirements