40Cr high tensile bolts wholesale supplier
XZ Fastener supplies 40Cr high tensile bolts for distributors, project contractors, equipment manufacturers, and maintenance buyers that need stable bulk supply with controlled material, heat treatment, finish, packing, and inspection requirements. 40Cr alloy steel is often used for stronger metric hex head bolts, studs, and special bolting parts in machinery, vehicle components, tooling, and steel structure assemblies. Products can be supplied according to DIN, ISO, GB, ANSI, or buyer drawings. Buyers can review related fastener products before sending a wholesale size list.
Quick Specs
What Buyers Should Know Before Sourcing 40Cr High Tensile Bolts
Wholesale buyers often purchase several bolt sizes, finishes, and packing formats in one order. Before sourcing 40Cr high tensile bolts, confirm the product standard, diameter, length, thread pitch, full or partial thread, strength class, heat treatment, finish, packing labels, and inspection scope. These details affect production planning, batch separation, and final unit cost.
For non-standard head dimensions, shoulder sections, fine threads, extended lengths, drilled holes, or project-specific marks, XZ Fastener can review custom fasteners according to drawings, samples, or clear technical descriptions.
Common Purchasing Descriptions
- 40Cr high tensile hex bolts, quenched and tempered, black oxide finish, wholesale packing.
- 40Cr metric hex head bolts, Grade 10.9, partial thread, packed by size and batch.
- DIN 933 full thread hex bolts in 40Cr alloy steel for machinery assembly and repair stock.
- Grade 8.8 carbon steel hex bolts for medium-strength stock programs.
- Zinc plated DIN 933 bolts and black oxide DIN 933 bolts for equipment and workshop inventory.
- Hot dip galvanized DIN 933 bolts for outdoor steel structures, with coating thickness and thread fit reviewed before production.
Detailed Specifications Table
| Artículo | Opciones disponibles | Wholesale Buyer Notes |
|---|---|---|
| Tipo de producto | Hex bolts, heavy hex bolts, flange bolts, studs, shoulder bolts, and special bolting parts | Separate standard bolts and drawing-based parts in the inquiry for faster checking. |
| Material | 40Cr alloy steel; alternative alloy steel grades available upon request | Equivalent grades should be confirmed by chemical composition and mechanical properties. |
| Estándar | DIN 931, DIN 933, ISO 4014, ISO 4017, GB, ANSI, ASTM, or buyer drawing | State the standard revision if the project specification controls it. |
| Rango de diámetro | Metric and inch bolt sizes can be reviewed according to order quantity and tooling | Large diameters may require additional review for heat treatment depth and straightness. |
| Thread | Metric coarse, metric fine, UNC, UNF, full thread, partial thread | Include pitch, tolerance, and mating nut requirement in the wholesale size list. |
| Heat Treatment | Quenching and tempering according to strength, hardness, or drawing requirement | Provide required property class, hardness range, tensile strength, or test method. |
| Acabado superficial | Plain oil, black oxide, zinc plated, phosphate, Geomet, Dacromet, hot dip galvanized | Different finishes can be packed separately according to order requirement. |
| Inspection | Dimensional check, thread gauge, hardness, tensile, proof load, coating thickness, visual inspection | Inspection reports or third-party checks should be confirmed before order placement. |
| Packing | Bulk cartons, small boxes, pallets, export labels, distributor labels, mixed-size packing | Provide carton weight limits, pallet rules, label content, and shipping marks. |
Material and Grade Explanation
40Cr is a chromium alloy steel commonly used for high tensile bolts after quenching and tempering. Compared with ordinary low carbon steel, 40Cr can offer improved hardenability and higher strength potential when heat treatment is properly controlled.
Wholesale buyers should confirm whether the order requires 40Cr under Chinese material designation or an equivalent grade. Chemical composition, mechanical properties, hardness, tensile strength, proof load, and test method should be stated clearly when material substitution is restricted. Related technical guides can help purchasing teams prepare clearer specifications.
Surface Finish Selection Guide
- Plain oil: suitable for indoor storage or parts that will be assembled soon after delivery.
- Black oxide: common for machinery bolts where a dark appearance and light oil protection are acceptable.
- Zinc plated: used for general corrosion protection and clean appearance in dry environments.
- Phosphate: selected for controlled friction, oil retention, or specific assembly requirements.
- Geomet or Dacromet: considered when improved corrosion resistance is needed for high tensile bolts.
- Hot dip galvanized: used for outdoor steel structures, with coating thickness and thread fit reviewed in advance.
Manufacturing and Quality Control
Production Review
Wholesale production planning covers material confirmation, drawing review, heading or machining, thread rolling or cutting, heat treatment, surface finishing, inspection, batch separation, and packing. For 40Cr bolts, heat treatment control is a key step because it affects strength, hardness, and service performance.
For material traceability, buyers can discuss raw material inspection, batch control, and documentation before production starts.
Inspection Points
Common checks include size measurement, thread gauge inspection, head dimension verification, hardness test, tensile or proof load test when required, coating thickness, surface appearance, marking, quantity, and packing label review.
For more detail on process checks, review XZ Fastener’s article about manufacturing quality control.
Aplicaciones
Heavy Machinery
Used in frames, brackets, housings, lifting components, and equipment maintenance assemblies.
Automotive and Transport
Selected for mechanical assemblies where strength, thread engagement, and vibration resistance matter.
Mining Equipment
Applied in high-load fastening positions where impact and repeated maintenance cycles are considered.
Tooling Fixtures
Used in clamping systems, fixture plates, dies, molds, and workshop tooling assemblies.
Distributor Stock
Supplied for bulk inventory programs where several sizes, grades, and finishes are packed by item code.
Steel Structure Assembly
Can be reviewed for structural bolting packages where grade, finish, packing, and inspection are controlled.
How to Get a Faster Quotation
A complete wholesale inquiry helps XZ Fastener check material, tooling, heat treatment, finish, inspection, packing, and shipping details without repeated clarification. For 40Cr high tensile bolts, strength class and heat treatment requirements should be listed clearly for controlled items.
- Send size list with diameter, length, thread pitch, standard, and quantity.
- Confirm full thread or partial thread, property class, and material grade.
- Attach drawings for non-standard dimensions, special markings, holes, or controlled tolerances.
- State finish, packaging method, label format, carton weight, pallet requirement, and destination.
- List inspection requirements, reports, or third-party checking before quotation.
Wholesale Packing and Delivery Planning
Bulk bolt orders may require item-code labels, mixed-size cartons, separate packing by finish, pallet packing, barcode labels, or project shipping marks. Buyers should also confirm destination documents, invoice description, and packing list format. XZ Fastener can discuss shipping documents before shipment planning.
For mixed orders, separate each bolt size and finish by line item. If bolts will be assembled with nuts, washers, painted steel, or galvanized steel, mention the mating parts so thread fit and coating thickness can be reviewed.
Preguntas frecuentes
Can XZ Fastener supply 40Cr high tensile bolts for wholesale orders?
Yes. Wholesale orders can be reviewed according to the buyer’s size list, standards, quantities, finish, packing method, labels, and inspection requirements. Mixed sizes should be separated by line item.
What strength class can 40Cr bolts be supplied in?
40Cr bolts can be heat treated for high tensile applications, with classes such as 8.8 or 10.9 reviewed according to size, standard, and order requirement. Buyers should state the required property class or mechanical values.
Can different finishes be supplied in one wholesale shipment?
Different finishes such as black oxide, zinc plated, phosphate, Geomet, Dacromet, or hot dip galvanized can be reviewed in one order. Separate packing by finish is recommended for clearer receiving and inventory control.
Can 40Cr bolts be packed with distributor labels?
Distributor labels, item codes, shipping marks, carton labels, and pallet labels can be discussed according to order requirement. Buyers should provide label artwork or label content before packing confirmation.
Can XZ Fastener make non-standard 40Cr bolts from drawings?
Drawing-based bolts can be reviewed according to order requirement. Please provide dimensions, tolerances, material grade, heat treatment, finish, inspection requirements, and quantity.
What information is needed for a wholesale quotation?
Please send product standard or drawing, size list, thread pitch, material, strength class, finish, quantity, packaging, inspection requirements, delivery destination, and required shipping documents.
Send Your 40Cr High Tensile Bolt Wholesale Inquiry
For a faster quotation, send your size list, finish, quantity, packaging, and inspection requirements. Drawings, samples, distributor label details, mating nut information, destination, and document needs help XZ Fastener confirm production and wholesale supply arrangements more accurately.
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