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Русский Metric Flange Bolts for Wholesale Supply
Class 8.8 metric flange bolts wholesale supplier
XZ Fastener supplies Class 8.8 metric flange bolts for wholesale buyers serving machinery, automotive brackets, equipment frames, construction hardware, maintenance programs, and distributor stock. The integrated flange head provides a wider bearing surface and can reduce the need for a separate washer in suitable assemblies. Bolts can be supplied to DIN 6921, ISO 4162, or drawing requirements, with serrated and non-serrated flange options available upon request. Carbon steel materials, heat treatment, zinc plated, black oxide, phosphate, hot dip galvanized, and selected coated finishes can be reviewed according to order requirement, wholesale packing, and inspection needs.
Quick Specs
What Buyers Should Know Before Sourcing Class 8.8 Metric Flange Bolts
Class 8.8 metric flange bolts are used where buyers need a practical strength level, external hex drive, and a built-in flange bearing surface. When comparing fastener products, confirm the dimensional standard, diameter, pitch, length, thread length, flange diameter, serrated or non-serrated flange, material, finish, and wholesale packing method.
The flange can help spread load on compatible surfaces, but slot size, clearance hole, coating thickness, and mating nut or threaded hole should still be checked. If your assembly requires a special flange diameter, non-standard length, modified thread, or drawing-based geometry, XZ Fastener can review related custom fasteners with the flange bolt order.
Wholesale Order Checklist
- Confirm DIN 6921, ISO 4162, or drawing-based dimensions.
- Send diameter, pitch, length, thread length, and flange style.
- Specify Class 8.8 carbon steel mechanical property requirement.
- Review finish choice for corrosion resistance, friction, and assembly behavior.
- Provide packaging, carton weight, pallet plan, item labels, and inspection requirements.
Common Purchasing Descriptions
- Class 8.8 metric flange bolts, DIN 6921, zinc plated, non-serrated flange.
- ISO 4162 hexagon flange bolts, Class 8.8, metric coarse thread.
- Class 8.8 serrated flange bolts, black oxide finish, wholesale carton packing.
- Carbon steel metric flange bolts, partial thread, hot dip galvanized finish.
- Metric flange bolts packed by item code, size, finish, carton, and pallet label.
For mixed wholesale purchasing lists, Class 8.8 metric flange bolts may be ordered together with DIN 933 full thread hex bolts, Grade 8.8 carbon steel hex bolts, metric hex head bolts, zinc plated DIN 933 bolts, black oxide DIN 933 bolts, and hot dip galvanized DIN 933 bolts. Buyers can combine these with standard fasteners for broader assembly supply.
Detailed Specifications Table
| Specification Item | Typical Options | Buyer Notes |
|---|---|---|
| Product Name | Class 8.8 metric flange bolts | Metric bolts with external hex drive and integrated flange bearing surface. |
| Dimensional Standard | DIN 6921, ISO 4162, or buyer drawing | Confirm flange diameter, head height, wrench size, and serration requirement. |
| Thread | Metric coarse or fine thread, full or partial thread | Send diameter, pitch, length, and thread length requirement. |
| Strength Class | Class 8.8 | Suitable for many machinery, automotive, bracket, and equipment assemblies. |
| مادة | Carbon steel with heat treatment as required | Carbon steel fasteners are widely used for Class 8.8 metric bolt production. |
| Finish | Zinc plated, black oxide, phosphate, hot dip galvanized, selected coatings | Finish should be matched with corrosion exposure and mating components. |
| Inspection | Dimension check, thread gauge, hardness, tensile test, surface inspection | Inspection reports can be arranged according to purchase order requirement. |
| Wholesale Packing | Bulk carton, small box, bag, wooden case, pallet, or assembly kit | Labels, carton weight, item codes, and pallet layout are available upon request. |
Final specification should be confirmed by purchase order, drawing, sample, or project requirement before production arrangement.
Material and Grade Explanation
Class 8.8 metric flange bolts are usually made from carbon steel and heat treated to meet the mechanical property class. They offer a practical strength level for many general industrial assemblies, with the flange head helping distribute load across a wider area than a standard hex head.
Class 8.8 is often selected when buyers need more strength than low carbon commercial bolts but do not require higher classes such as 10.9 or 12.9. Buyers comparing metric standards can review the DIN and ISO fastener standards guide before confirming DIN 6921, ISO 4162, DIN 933, or drawing-based requirements.
Grade Selection Notes
- Class 8.8 is widely used for machinery, brackets, and equipment mounting.
- Flange heads can reduce the need for a separate washer in suitable assemblies.
- Serrated flange options may improve resistance to loosening in selected applications.
- Mating nuts, threaded holes, and washers should be matched to the bolt grade and finish.
Surface Finish Selection Guide
General Industrial Finishes
Zinc plated Class 8.8 metric flange bolts are often used for general machinery, cabinets, brackets, and equipment assemblies. Black oxide and phosphate finishes can be supplied for indoor use, dark appearance, or light oil protection according to order requirement.
Outdoor and Coated Assemblies
Hot dip galvanized flange bolts can be reviewed for outdoor steelwork and construction hardware where dimensional fit and thread engagement are suitable. Zinc flake and other coated fasteners can also be quoted when the project needs controlled corrosion resistance and consistent finish appearance.
Manufacturing and Quality Control
Class 8.8 metric flange bolts are produced through material preparation, forming, thread rolling, heat treatment when required, surface finishing, inspection, and packing. Wholesale supply control focuses on thread fit, flange geometry, head dimensions, mechanical property, coating appearance, and packing accuracy according to order requirement.
For orders that include related nuts, washers, and additional bolts, XZ Fastener can help organize item-code sorting, mixed cartons, pallet labels, and inspection documents. This supports machinery assembly, maintenance programs, and distributor replenishment with fewer receiving errors.
Typical Inspection Points
- Head height, across flats, flange diameter, and serration review.
- Thread gauge inspection for go and no-go fit.
- Hardness and mechanical property review according to order requirement.
- Surface finish appearance and coating consistency inspection.
- Packing quantity, carton label, item code, and pallet plan verification.
تطبيقات
- Automotive brackets, equipment panels, chassis accessories, and service parts.
- Machinery frames, conveyor systems, motor mounts, and equipment bases.
- Construction hardware, steel supports, guard panels, and maintenance assemblies.
- Distributor stock, wholesale replenishment, and assembled fastener kits.
Class 8.8 metric flange bolts are often chosen when a moderate high strength bolt with a built-in bearing surface is preferred. Where additional load distribution is needed, matching flat washers and related components can be reviewed according to drawing and installation conditions.
How to Get a Faster Quotation
To receive a clear quotation for Class 8.8 metric flange bolts, send the standard or drawing, diameter, pitch, length, thread length, flange type, finish, quantity, packing method, delivery destination, and inspection requirements. If the bolt is used in automotive, machinery, or construction hardware, include application notes and any required reports.
For wholesale orders, prepare carton weight, item labels, pallet size, finish requirement, and inspection documents so production and shipment planning can be confirmed efficiently.
أسئلة متكررة
What standard is commonly used for Class 8.8 metric flange bolts?
DIN 6921 and ISO 4162 are common references for metric hex flange bolts. Buyers should confirm the required standard or provide a drawing when flange diameter, head height, or serration details are critical.
What material is used for Class 8.8 metric flange bolts?
Class 8.8 metric flange bolts are commonly made from carbon steel with suitable heat treatment. Material and process can be reviewed according to order requirement and application conditions.
Can Class 8.8 flange bolts be supplied with serrated flange?
Yes. Serrated and non-serrated flange options can be supplied according to drawing, standard, and application requirement. Buyers should specify this clearly in the inquiry.
Which finishes are suitable for Class 8.8 flange bolts?
Zinc plated, black oxide, phosphate, hot dip galvanized, zinc flake, and selected coatings can be reviewed. Finish selection should consider corrosion exposure, assembly friction, and mating components.
Can Class 8.8 metric flange bolts be supplied in fine thread?
Metric coarse and fine thread options can be supplied according to order requirement. Please provide diameter, pitch, length, and thread length when requesting a quotation.
What inspection documents can be requested for wholesale orders?
Dimension inspection, thread gauge check, hardness report, mechanical property report, coating inspection, and packing verification can be arranged according to purchase order requirement.
Send Your Class 8.8 Metric Flange Bolt Inquiry
For a faster quotation, send your size list, standard or drawing, finish, quantity, packaging method, delivery destination, and inspection requirements. XZ Fastener can review wholesale order details, flange type, coating selection, carton labels, pallet plan, mechanical testing, and any drawing-based requirements before production or shipment arrangement.