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العربية mild steel hex bolts manufacturer
XZ Fastener manufactures mild steel hex bolts for general machinery, light steel structures, brackets, furniture hardware, electrical frames, and maintenance fastening projects. Bolts can be supplied according to DIN 931, DIN 933, ISO 4014, ISO 4017, ANSI/ASME B18.2.1, or customer drawings, with full thread and partial thread options available. Mild steel grades such as 4.8 and 5.8 are commonly selected for cost-sensitive assemblies where moderate strength, ductility, coating flexibility, and stable dimensional fit are required.
Size lists, finish requirements, packaging labels, and inspection reports can be arranged according to order requirement.
Quick Specs
What Buyers Should Know Before Sourcing Mild Steel Hex Bolts
Use Mild Steel Where Moderate Strength Is Enough
Mild steel hex bolts are usually selected for general-purpose fastening rather than high-preload structural joints. They are practical for brackets, sheet metal frames, equipment covers, light construction hardware, and non-critical assemblies. For material comparison, buyers can review XZ Fastener’s guide to carbon steel fasteners, strength, and corrosion resistance.
Confirm Thread Length Before Quotation
Full thread and partial thread bolts are not always interchangeable. DIN 933 full thread hex bolts are often used when the threaded area must run close to the head, while DIN 931 partial thread bolts provide an unthreaded shank for certain assemblies. The guide to DIN 933 vs DIN 931 bolts explains the difference in practical terms.
Common Purchasing Descriptions
Purchasing descriptions should include standard, size, grade, thread type, finish, and packing method. The following wording is commonly used by importers, distributors, and equipment buyers.
- Mild steel hex bolts DIN 933 full thread, zinc plated, Grade 4.8
- DIN 931 mild steel hex bolts, partial thread, plain or black oxide finish
- metric hex head bolts in mild steel for general machinery and light-duty assembly
- zinc plated DIN 933 bolts for indoor storage, light corrosion protection, and bright appearance
- black oxide DIN 933 bolts for dark finish machinery hardware and protected indoor use
- hot dip galvanized DIN 933 bolts for outdoor light steelwork where thicker coating is acceptable
- Grade 8.8 carbon steel hex bolts when a higher strength option is required than mild steel grades
For general bolt family selection, XZ Fastener also provides a guide to hex bolts, flange bolts, carriage bolts, and other bolt types.
Detailed Specifications Table
| Item | Common Options | Purchasing Notes |
|---|---|---|
| Product Name | Mild steel hex bolts | Also described as low carbon steel hex bolts or general-purpose hex head bolts |
| Standards | DIN 931, DIN 933, ISO 4014, ISO 4017, ANSI/ASME B18.2.1 | Confirm the standard because head size, thread length, and tolerance may differ |
| Size Range | M3 to M36, inch sizes available upon request | Diameter, length, pitch, and thread length should be listed clearly |
| Thread Type | Metric coarse, metric fine, UNC, UNF, full thread, partial thread | Thread pitch must match nuts, tapped holes, or existing inventory |
| Material | Mild steel, low carbon steel, Q235, C1008, C1018, equivalent grades | Material can be selected according to strength, forming, coating, and cost requirement |
| Strength | Grade 4.8, 5.8, or order-specified mild steel class | Grade 8.8 and higher grades should be specified separately when required |
| Finish | Plain, zinc plated, yellow zinc, black oxide, hot dip galvanized, phosphate | Finish should match corrosion exposure, appearance, thread fit, and budget |
| Matching Parts | Hex nuts, flange nuts, flat washers, spring lock washers | Matching nut and washer finish should be confirmed for assembled kits |
| Inspection | Dimension, thread, visual surface, coating thickness, hardness where required | Inspection reports are available upon request when specified before order confirmation |
| Packaging | Bulk cartons, small boxes, plastic bags, pallets, customer label | Private labels and mixed-size packing can be arranged according to order requirement |
Material and Grade Explanation
Mild steel is a low carbon steel option used when buyers need economical bolts with good ductility and easy surface finishing. It is suitable for many non-critical fastening points, light-duty frames, covers, brackets, and equipment accessories. Compared with higher tensile grades, mild steel is easier to form and coat, but it should not be selected for high-load joints unless the drawing or engineering requirement allows it.
When strength is a concern, buyers should compare Grade 4.8, Grade 5.8, and Grade 8.8 requirements before ordering. XZ Fastener’s hex bolt sizes, grades, and installation guide can help purchasing teams check common grade and size details.
Surface Finish Selection Guide
Plain Finish
Suitable for protected indoor storage, short-term use, or buyer-controlled secondary processing. Light oil can be requested for temporary protection.
Zinc Plated
Common for mild steel hex bolts used in general hardware, furniture, brackets, and indoor equipment. White zinc and yellow zinc options can be discussed.
Black Oxide
Used when a dark appearance is needed for machinery hardware. It is usually paired with oil and is better suited to protected environments.
Hot Dip Galvanized
Selected for outdoor use where thicker coating and higher corrosion resistance are acceptable. Thread fit should be checked with matching nuts.
Phosphate
Available upon request for specific appearance or assembly needs. Oil or additional protection may be required depending on storage conditions.
Custom Coating
Special color, coating thickness, salt spray requirement, or customer packaging can be discussed before order confirmation.
For finish comparison, buyers can review the black oxide vs zinc plated fasteners guide and the broader fastener coating guide.
Manufacturing and Quality Control
Mild steel hex bolt production may include wire or bar material inspection, cutting, cold heading or hot forging, thread rolling, surface finishing, sorting, inspection, and packing. For standard bolts, key checks include head dimensions, length, thread pitch, thread fit, surface defects, coating thickness, and packaging labels.
For procurement teams preparing inspection requirements, XZ Fastener provides a practical guide to fastener quality control during manufacturing and a reference on go/no-go thread gauge testing.
Applications
- General machinery covers, brackets, guards, and support plates
- Furniture hardware, shelving, racks, and light-duty frames
- Electrical cabinets, appliance frames, and equipment enclosures
- Light construction hardware and non-critical maintenance fastening
- Distributor stock programs requiring common metric hex head bolts
- OEM assembly lines requiring stable size, finish, and packaging
- Repair kits with hex nuts, flat washers, and spring lock washers
- Outdoor light-duty projects when galvanized or suitable coating is specified
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, full thread or partial thread requirement, material grade, finish, quantity, packaging method, and inspection requirements. If the bolts need matching nuts, flat washers, spring lock washers, barcodes, or customer labels, include those details in the same inquiry.
For a structured inquiry, use the request a quote page or contact XZ Fastener with drawings, photos, samples, or current supplier part numbers.
FAQ
What grade is commonly used for mild steel hex bolts?
Grade 4.8 and Grade 5.8 are common choices for mild steel hex bolts. If the assembly requires higher tensile strength, Grade 8.8 or alloy steel grades should be specified separately.
Can mild steel hex bolts be zinc plated?
Yes. Zinc plated mild steel hex bolts are commonly supplied for general indoor applications. White zinc, yellow zinc, and coating thickness requirements can be discussed before production.
Are mild steel hex bolts suitable for outdoor use?
Plain or zinc plated mild steel bolts are usually better for indoor or protected environments. For outdoor use, hot dip galvanized or another specified coating may be more suitable depending on exposure.
Can XZ Fastener supply full thread and partial thread mild steel bolts?
Yes. DIN 933 and ISO 4017 full thread bolts, as well as DIN 931 and ISO 4014 partial thread bolts, can be supplied according to order requirement.
Can bolts be packed with nuts and washers?
Yes. Mild steel hex bolts can be supplied with matching hex nuts, flat washers, spring lock washers, or custom kit packaging when the size, finish, quantity, and label requirements are provided.
What information should be included in an RFQ?
Please include the standard or drawing, size list, grade, finish, quantity, thread type, packaging method, and inspection requirements. Photos or samples are helpful when the specification is unclear.
Send Your Mild Steel Hex Bolt Inquiry
For a faster quotation, please send your size list, finish, quantity, packaging method, and inspection requirements. Drawings, grade expectations, coating details, matching nut or washer needs, and label format help confirm the correct mild steel hex bolts before production.
Request a Quote from XZ Fastener