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العربية high tensile steel bolts manufacturer
XZ Fastener manufactures high tensile steel bolts for machinery, structural assemblies, heavy equipment, automotive projects, mining equipment, and construction fastening packages. Bolts can be supplied according to DIN, ISO, ANSI, ASTM, or customer drawings, with Grade 8.8, 10.9, 12.9, and project-specified strength options. Materials, heat treatment, thread length, finish, matching nuts and washers, packaging, and inspection documents can be arranged according to order requirement, helping buyers control strength, fit, corrosion protection, and receiving accuracy before shipment.
Metric and inch sizes, full thread and partial thread types, and project packaging are available upon request.
Quick Specs
What Buyers Should Know Before Sourcing High Tensile Steel Bolts
Strength Class Must Match the Joint
High tensile steel bolts are selected for load-carrying assemblies, but the correct grade depends on clamp load, shear or tensile direction, mating nut grade, washer type, tightening method, and working environment. For a practical grade comparison, review XZ Fastener’s guide to 8.8, 10.9, and 12.9 bolt mechanical properties.
Thread Length Affects Assembly Fit
Buyers should confirm full thread or partial thread before ordering. DIN 933 and ISO 4017 are commonly used for full thread metric hex head bolts, while DIN 931 and ISO 4014 are commonly used for partial thread bolts. The DIN 933 vs DIN 931 guide can help prevent mismatched thread length in purchasing.
Common Purchasing Descriptions
High tensile steel bolts may be described by standard, grade, finish, thread length, or project application. Clear descriptions help avoid incorrect material, coating, or packaging during bulk orders.
- DIN 933 full thread hex bolts, Grade 8.8, Grade 10.9, or Grade 12.9
- Grade 8.8 carbon steel hex bolts with zinc plated, black oxide, or hot dip galvanized finish
- metric hex head bolts for machinery, structural brackets, and heavy equipment assembly
- zinc plated DIN 933 bolts for general indoor corrosion protection
- black oxide DIN 933 bolts for machinery and dark technical appearance
- hot dip galvanized DIN 933 bolts for outdoor construction and steel structure projects
- High tensile hex bolts with matching hex nuts, heavy hex nuts, flat washers, or hardened washers
For broader bolt type selection, buyers can also review the guide to hex bolts, flange bolts, carriage bolts, and other bolt types.
Detailed Specifications Table
| Item | Common Options | Purchasing Notes |
|---|---|---|
| Product Name | High tensile steel bolts | May include hex bolts, structural bolts, flange bolts, anchor bolts, or drawing-based bolts |
| Standards | DIN 931, DIN 933, ISO 4014, ISO 4017, ANSI/ASME B18.2.1, ASTM specifications | Confirm the exact standard because dimensions and thread length may differ |
| Size Range | M5 to M64, inch sizes available upon request | Large diameter and long length bolts should include drawing or project specification |
| Thread Type | Metric coarse, metric fine, UNC, UNF, full thread, partial thread | Pitch and thread length should be listed with each size |
| Material | Carbon steel, boron steel, alloy steel, 40Cr, 35CrMo, SCM435, 4140 | Material selection depends on strength class, heat treatment, and service condition |
| Strength | Grade 8.8, 10.9, 12.9, ASTM specified grades, custom requirement | Mechanical property requirements should be confirmed before production |
| Finish | Plain, black oxide, zinc plated, yellow zinc, hot dip galvanized, zinc flake, phosphate, PTFE | Finish should match corrosion exposure and assembly friction requirements |
| Matching Components | Hex nuts, heavy hex nuts, flat washers, hardened washers, spring lock washers | Nut grade and washer hardness should match bolt strength and joint design |
| Inspection | Dimensions, thread, hardness, tensile, proof load, coating thickness, visual inspection | Inspection reports can be supplied when requested before order confirmation |
| Packaging | Bulk cartons, small boxes, bags, pallets, customer labels, project kits | Export packing can be arranged according to order requirement |
Material and Grade Explanation
High tensile steel bolts usually require controlled material selection and heat treatment to reach the specified mechanical class. Grade 8.8 is widely used for general machinery and construction assemblies, while Grade 10.9 and Grade 12.9 are selected for higher load requirements where design conditions allow. For metric bolts, ISO 898-1 provides useful mechanical property references for tensile strength, yield strength, proof load, and hardness.
When higher strength is required, buyers should confirm the complete assembly rather than only the bolt grade. Nut grade, washer hardness, thread engagement, torque method, surface finish, and service temperature can all affect joint performance. XZ Fastener’s ISO 898-1 bolt grades guide provides additional selection context for engineering and purchasing teams.
Surface Finish Selection Guide
Plain or Oiled
Suitable for protected storage, indoor use, or when the buyer plans secondary treatment after receiving the bolts.
Black Oxide
Common for machinery and equipment assemblies where a dark finish is required. Oil protection is usually needed for storage.
Zinc Plated
Used for general indoor corrosion protection and bright appearance. High-strength grades require careful process control.
Hot Dip Galvanized
Often selected for outdoor steel structures and construction projects. Thread fit and matching nut allowance should be confirmed.
Zinc Flake
Available upon request for higher corrosion resistance and non-electrolytic coating requirements on high-strength bolts.
PTFE or Special Coating
Used when controlled friction, color coding, or project-specific corrosion performance is required.
For coating comparison, buyers can refer to XZ Fastener’s fastener coating guide and the guide to zinc plated vs hot dip galvanized bolts.
Manufacturing and Quality Control
High tensile steel bolt production may include raw material inspection, cutting, cold heading or hot forging, thread rolling, heat treatment, surface finishing, sorting, inspection, and packaging. For critical grades, hardness, tensile behavior, decarburization, thread accuracy, coating thickness, and marking should be controlled according to the agreed standard or drawing.
Buyers can specify inspection requirements before production. Helpful references include XZ Fastener’s guide to fastener quality control during manufacturing and go/no-go thread gauge testing.
Applications
- Heavy machinery, equipment frames, and production line maintenance
- Steel structures, brackets, platforms, and construction fastening packages
- Mining equipment, agricultural machinery, trailers, and off-road vehicles
- Wind power, solar mounting, guardrails, and infrastructure assemblies
- OEM projects requiring stable grade, finish, and packing control
- High-load joints requiring controlled tightening and matching components
- Outdoor assemblies requiring HDG, zinc flake, or specified corrosion protection
- Replacement projects where DIN, ISO, ANSI, ASTM, or drawing dimensions must match
For demanding load applications, buyers may also review the supplier selection guide for high-load and high-strength fasteners.
How to Get a Faster Quotation
To help XZ Fastener prepare an accurate quotation, please send the standard or drawing, size list, diameter, length, thread pitch, thread length, grade, finish, quantity, packaging method, and inspection requirements. If bolts need matching nuts, washers, labels, pallet packing, or project batch numbers, include those details in the inquiry.
For urgent orders, use the request a quote page or contact XZ Fastener with drawings, photos, current supplier part numbers, or project specifications.
FAQ
What grades are commonly supplied for high tensile steel bolts?
Common metric grades include 8.8, 10.9, and 12.9. ASTM grades and drawing-specified grades can also be discussed according to project requirements.
Can high tensile steel bolts be supplied with nuts and washers?
Yes. Bolts can be supplied with matching hex nuts, heavy hex nuts, flat washers, hardened washers, or spring lock washers when the grade, finish, and packaging requirements are provided.
Which finish is suitable for outdoor high tensile bolts?
Hot dip galvanized, zinc flake, or specified coating systems are often considered for outdoor use. The correct choice depends on corrosion exposure, thread fit, assembly friction, and project requirements.
Can high tensile bolts be made according to drawings?
Yes. Drawing-based bolts can be supplied when dimensions, material, grade, thread, finish, tolerance, and inspection requirements are clearly provided before production.
What information is needed for a high tensile bolt quotation?
Please provide the standard or drawing, size list, grade, finish, quantity, thread type, packaging method, and inspection requirements. Photos or samples can help when the original specification is unclear.
Is Grade 12.9 always better than Grade 8.8 or 10.9?
No. Grade selection should follow the assembly design, load condition, mating components, tightening method, and service environment. A higher strength class is not always the correct choice for every joint.
Send Your High Tensile Steel Bolt Inquiry
For a faster quotation, please send your size list, required finish, quantity, packaging method, and inspection requirements. Drawings, grade requirements, coating expectations, and matching nut or washer details help confirm the correct high tensile steel bolts before production.
Request a Quote from XZ Fastener