A4-70 stainless steel hex bolts wholesale supplier
XZ Fastener supplies A4-70 stainless steel hex bolts for wholesale buyers, distributors, maintenance companies, and project contractors that need corrosion-resistant metric hex head bolts in repeatable batches. Orders can be arranged as DIN 933 full thread hex bolts, ISO 4017 bolts, DIN 931 partial thread bolts, or drawing-based stainless fasteners according to order requirement. A4-70 is suitable for many outdoor, coastal, marine, chemical equipment, and machinery assemblies where 316-family stainless steel is preferred. Buyers can source stainless steel hex bolts with size lists, packing labels, matching nuts and washers, and inspection documents confirmed before shipment.
Estándar
DIN 933 / ISO 4017 full thread; DIN 931 / ISO 4014 optional
Fuerza
A4-70; A4-80 available upon request
Material
A4 / 316-family austenitic stainless steel
Finish
Plain, passivated, pickled and passivated, lubricated
Aplicación
Marine fittings, outdoor structures, equipment, chemical facilities
What Buyers Should Know Before Sourcing A4-70 Stainless Steel Hex Bolts
Wholesale buyers usually care about repeatable size coverage, stable packing, clear labels, mixed-carton control, and reorder consistency. A4-70 stainless steel hex bolts should be specified by standard, diameter, length, thread type, material group, property class, finish, quantity per size, carton weight, pallet method, and inspection requirement.
Confirm the product range
DIN 933 and ISO 4017 are normally used for full thread hex bolts, while DIN 931 and ISO 4014 are used for partial thread hex bolts. For mixed wholesale programs, XZ Fastener can also supply A2 and A4 hex head bolts across multiple sizes.
Separate wholesale stock from project supply
Distributor stock orders often need standard sizes and clear labels, while project supply may require documents, third-party inspection, or special packing. The quotation should match the way the bolts will be received, stored, and resold.
Compare stainless and carbon steel correctly
A4-70 is selected for corrosion resistance. If the buyer needs higher strength and lower cost for dry structural use, Grade 8.8 carbon steel hex bolts may be reviewed separately, with a suitable surface finish.
Common Purchasing Descriptions
Accurate descriptions reduce confirmation time and help the supplier prepare the correct wholesale packing. Common purchasing descriptions include:
- A4-70 stainless steel hex bolts DIN 933 full thread, M6-M20 mixed sizes, plain finish, bulk carton packing.
- 316 stainless steel ISO 4017 metric hex head bolts, A4-70, passivated, with matching nuts and washers.
- DIN 931 partial thread A4-70 hex bolts for outdoor equipment and maintenance stock.
- Stainless steel hex cap screws M8 x 25 to M16 x 100, A4-70, carton label and pallet packing required.
- Carbon steel alternatives such as Grade 8.8 carbon steel hex bolts, zinc plated DIN 933 bolts, black oxide DIN 933 bolts, and hot dip galvanized DIN 933 bolts from the DIN 933 full thread hex bolt range.
For mixed-material wholesale orders, each item should be listed separately by standard, size, material, grade, finish, packing unit, and label requirement.
Detailed Specifications Table
| Artículo | Especificación | Wholesale Purchasing Notes |
|---|---|---|
| Product name | A4-70 stainless steel hex bolts | Can be supplied as bolts only or packed with matching nuts and washers. |
| Estándares | DIN 933, ISO 4017, DIN 931, ISO 4014, drawing-based parts | Confirm full thread or partial thread for every size. |
| Diameter range | Common metric sizes such as M3-M36; other sizes reviewed by order | Wholesale programs often focus on high-moving sizes such as M6-M20. |
| Longitud | Standard lengths or custom lengths according to drawings | Use this bolt thread length guide when preparing full thread and partial thread lists. |
| Thread | Metric coarse thread; fine pitch available upon request | Fine pitch must be clearly marked to avoid mixing with coarse thread stock. |
| Material | A4 / 316-family austenitic stainless steel | Material documents can be discussed before order confirmation. |
| Property class | A4-70 under ISO 3506 reference | A4-80 can be reviewed when higher stainless strength is required. |
| Finish | Plain, passivated, pickled and passivated, polished, lubricated | Wholesale stock should keep finish names consistent on labels and invoices. |
| Inspection | Dimensions, thread gauges, visual appearance, material documents, mechanical reports upon request | Inspection scope should be stated before production starts. |
| Wholesale packing | Bulk cartons, small boxes, bags, inner boxes, pallet packing, barcode labels, private labels | Carton weight and label content can be arranged according to order requirement. |
Material and Grade Explanation
A4 stainless steel is a molybdenum-bearing austenitic stainless group commonly selected where moisture, chloride exposure, marine air, or chemical environments may shorten the service life of carbon steel fasteners. A4-70 indicates both the stainless group and the property class, commonly associated with a minimum tensile strength level of 700 MPa under ISO 3506 reference conditions.
Wholesale buyers often compare A2 and A4 when deciding stock range. A2 can be suitable for many indoor and mild outdoor uses, while A4 is usually preferred for coastal, marine, wastewater, and chemical equipment applications. For deeper material comparison, review XZ Fastener’s guide to A2 vs A4 stainless steel fasteners.
A4-70 should not be described as a direct replacement for Grade 8.8 carbon steel hex bolts without checking load requirements. Stainless A4-70 offers corrosion resistance, while Grade 8.8 carbon steel offers higher strength and is often combined with zinc plating, black oxide, or hot dip galvanizing.
Wholesale orders can be checked for dimensions, thread fit, surface condition, quantity, labels, and packing requirements before shipment.
Surface Finish Selection Guide
Most A4-70 stainless steel hex bolts are ordered in plain stainless or passivated finish. Passivation helps remove free iron contamination from the surface and supports the natural stainless protective layer. Pickled and passivated finish may be requested when stronger cleaning is needed. Lubrication or anti-seize preparation can be discussed when galling risk is important.
| Finish | Typical Wholesale Use | Buyer Note |
|---|---|---|
| Plain stainless | General distributor stock, machinery repair, indoor and mild outdoor use | Common finish for standard stainless wholesale orders. |
| Passivated | Marine air, outdoor equipment, chemical equipment, clean stainless assemblies | Often requested where corrosion resistance and clean appearance are both important. |
| Pickled and passivated | Demanding surface cleaning requirements | Confirm appearance standard and acceptance criteria in advance. |
| Lubricated | Assemblies with repeated tightening or galling concern | Torque values may change when lubrication is used. |
| Carbon steel coatings | Zinc plated DIN 933 bolts, black oxide DIN 933 bolts, hot dip galvanized DIN 933 bolts | These are usually selected for carbon steel fasteners rather than A4 stainless steel bolts. |
For broader coating comparison, see XZ Fastener’s fastener finish guide.
Manufacturing and Quality Control
Wholesale supply starts with a confirmed size list, standard, material grade, finish, quantity per size, packing unit, label format, and inspection requirement. Depending on diameter and length, A4-70 stainless steel hex bolts can be produced by cold heading, hot forging, machining, thread rolling, or thread cutting.
Order review
XZ Fastener checks the standard, size, thread, finish, tolerance, quantity, carton weight, pallet method, and label requirement. Buyers can also browse broader fastener products for matching nuts, washers, threaded rods, anchors, and screws.
Production control
Control points can include head dimensions, across-flat size, thread length, thread gauge fit, surface appearance, burr control, material separation, and mixed-size packing prevention.
Custom wholesale programs
For private labels, special kits, mixed fastener boxes, or non-standard dimensions, XZ Fastener can review custom fasteners from drawings, samples, or buyer packing specifications.
Aplicaciones
A4-70 stainless steel hex bolts are practical wholesale items for distributors serving maintenance, fabrication, marine, outdoor equipment, and industrial repair markets.
- Marine equipment and coastal facilities
- Chemical processing equipment
- Outdoor steel and aluminum assemblies
- Wastewater treatment systems
- Pump, valve, and pipe support hardware
- Food and beverage support structures
- Solar mounting and exposed equipment frames
- Maintenance, repair, and distributor stock programs
For submerged seawater, strong chloride chemicals, high-temperature equipment, or critical load-bearing joints, engineering review is recommended before selecting A4-70.
How to Get a Faster Quotation
A clear wholesale inquiry helps XZ Fastener quote the correct A4-70 stainless steel hex bolts and packing method without repeated clarification. Please provide:
- Size list, such as M6 x 20, M8 x 30, M10 x 50, M12 x 80.
- Standard, such as DIN 933, ISO 4017, DIN 931, ISO 4014, or drawing number.
- Material and grade, such as A4-70, A4-80, A2-70, or 316 stainless steel.
- Finish requirement, such as plain, passivated, pickled and passivated, or lubricated.
- Quantity per size and expected reorder frequency.
- Packaging requirement, including bulk carton, small box, bag, pallet, label, barcode, or private brand packing.
- Inspection requirements, such as material certificate, dimensional report, visual inspection, or third-party inspection.
- Destination, delivery term, and any carton or pallet weight limits.
For a structured wholesale inquiry, use the request a quote page and attach a spreadsheet if the order includes many sizes.
Preguntas frecuentes
Is A4-70 stainless steel suitable for wholesale distributor stock?
Yes. A4-70 stainless steel hex bolts are practical stock items for buyers serving marine, outdoor, chemical equipment, maintenance, and machinery markets. The size range should match the buyer’s local demand and reorder pattern.
What is the difference between DIN 933 and DIN 931?
DIN 933 usually refers to full thread hex bolts, while DIN 931 usually refers to partial thread hex bolts. Wholesale buyers should separate these standards clearly in stock lists and labels.
Can A4-70 stainless bolts replace Grade 8.8 carbon steel hex bolts?
Not automatically. A4-70 is selected mainly for corrosion resistance, while Grade 8.8 carbon steel hex bolts are selected for higher strength. Load, environment, and assembly requirements should be checked before substitution.
Can XZ Fastener supply small box or private label packing?
Small boxes, bulk cartons, bags, pallet packing, barcode labels, shipping marks, and private label packing can be discussed according to order requirement.
Can matching nuts and washers be packed together?
Yes. Matching stainless hex nuts, flat washers, spring washers, and assembly kits can be supplied according to the bolt standard, thread, material, and packing requirement.
What documents can be requested for wholesale shipments?
Buyers may request material test certificates, dimensional inspection reports, packing lists, visual inspection records, and other documents according to order requirement. Document needs should be confirmed before production.
Can mixed sizes be shipped on one pallet?
Yes, mixed-size pallet packing can be arranged. Buyers should provide carton label format, size separation requirements, pallet weight limits, and receiving instructions to reduce sorting work after delivery.
Send Your Wholesale A4-70 Stainless Hex Bolt Inquiry
Send your size list, finish, quantity, packaging method, and inspection requirements. Include the standard or drawing number, carton label needs, pallet requirements, destination, and whether matching nuts and washers are needed. XZ Fastener will review the details and prepare a quotation according to your order requirement.
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