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العربية stainless steel 316 hex bolts manufacturer
XZ Fastener manufactures stainless steel 316 hex bolts for buyers who need stronger corrosion resistance than 304 stainless steel in chloride, outdoor, marine, and chemical-adjacent environments. Products can be supplied according to DIN 933, DIN 931, ISO 4017, ISO 4014, ANSI / ASME B18.2.1, or customer drawings. Common material descriptions include 316, A4, A4-70, A4-80, and SUS316 according to order requirement. Metric and inch thread options, full thread and partial thread styles, matching nuts, washers, surface cleaning, packaging, and inspection requirements can be reviewed before production.
316 stainless steel hex bolts can be supplied for marine equipment, outdoor machinery, process equipment, architectural fastening, and corrosion-resistant assemblies.
Quick Specs
What Buyers Should Know Before Sourcing Stainless Steel 316 Hex Bolts
Stainless steel 316 hex bolts are usually selected when the application needs better resistance to chlorides and outdoor corrosion than 304 stainless steel. The buyer should still confirm the dimensional standard, strength class, thread pitch, length, surface finish, and matching nut and washer material before placing an order.
For many international projects, 316 may also be written as A4 or SUS316. Buyers comparing 304 and 316 can review XZ Fastener’s guide to 304 vs 316 stainless steel bolts before confirming the final material.
Procurement checks
- Confirm 316, A4, SUS316, or 316L material description.
- State the standard, diameter, pitch, length, and thread style.
- Check whether A4-70, A4-80, or another strength class is required.
- Use compatible stainless nuts and washers for the full assembly.
- Define surface finish, packaging, and inspection documents before quotation.
Common Purchasing Descriptions
316 stainless bolt descriptions
- Stainless steel 316 hex bolts, DIN 933, full thread, A4-70
- A4-80 stainless steel hex bolts for corrosion-resistant assemblies
- SUS316 metric hex head bolts, ISO 4017, plain finish
- 316 stainless steel inch hex bolts, UNC or UNF thread
- A4 stainless steel hex bolts with matching nuts and flat washers
Comparison requests buyers may include
- DIN 933 full thread hex bolts in 316 stainless steel or carbon steel
- Grade 8.8 carbon steel hex bolts where higher strength is required
- Metric hex head bolts supplied in A4 stainless steel, A2 stainless steel, or carbon steel
- Zinc plated DIN 933 bolts for indoor carbon steel alternatives
- Black oxide DIN 933 bolts or hot dip galvanized DIN 933 bolts for different carbon steel finish requirements
For high-strength stainless requests, buyers can also review A4-80 stainless steel bolts and confirm whether A4-70 or A4-80 is suitable for the assembly.
Detailed Specifications Table
| Specification Item | Common Options | Buyer Notes |
|---|---|---|
| Product type | Hex head bolt, full thread bolt, partial thread bolt, hex cap screw | Confirm whether the design needs full thread engagement or an unthreaded shank section. |
| Estándares | DIN 933, DIN 931, ISO 4017, ISO 4014, ANSI / ASME B18.2.1, drawing parts | The selected standard affects head dimensions, thread length, body diameter, and length measurement. |
| Material | Stainless steel 316, A4, SUS316, 316L where specified | 316 is normally selected for stronger chloride and outdoor corrosion resistance compared with 304. |
| Strength class | A4-50, A4-70, A4-80 | A4-70 is common, while A4-80 should be confirmed when higher stainless bolt strength is required. |
| Diameter range | Common metric sizes M3 to M36; inch sizes available upon request | Large diameters, special lengths, and non-standard threads should be checked with drawings. |
| Thread | Metric coarse, metric fine, UNC, UNF, custom thread | Pitch and tolerance should match the nut. XZ Fastener can review thread fit according to order requirement. |
| Finish | Plain, passivated, polished, waxed, cleaned, custom surface treatment | Passivation and cleaning can be requested to support surface condition after forming, machining, and handling. |
| Matching parts | 316 stainless nuts, 316 stainless washers, spring washers, custom washers | Use XZ Fastener’s guide to matching stainless steel bolts, nuts, and washers when ordering full assemblies. |
| Inspection | Dimensions, thread gauge, material check, surface condition, packing verification | Material documents, inspection records, and packing requirements should be confirmed before quotation. |
| Packaging | Bulk cartons, small boxes, bags, pallets, labels, customer-specified packing | Stainless bolts should be packed to reduce scratches and avoid mixed-material contamination. |
Material and Grade Explanation
Stainless steel 316 is an austenitic stainless material commonly described as A4 or SUS316 in international fastener purchasing. Compared with 304, 316 contains molybdenum, which helps improve resistance in chloride and more demanding outdoor environments. For some applications, 316L can be requested when lower carbon content is required.
Strength classes such as A4-50, A4-70, and A4-80 should be confirmed separately from the material grade. Stainless steel 316 hex bolts are selected mainly for corrosion resistance and material compatibility; they should not be treated as a direct replacement for Grade 8.8 carbon steel hex bolts unless the design permits it. For material selection, review A2 vs A4 stainless steel fasteners.
Material selection reminders
- Use 316 / A4 for stronger chloride and outdoor corrosion resistance.
- Consider 304 / A2 only when the environment is less demanding.
- Confirm A4-70 or A4-80 when strength class matters.
- Match 316 bolts with compatible stainless nuts and washers.
- Confirm passivation, surface cleaning, or anti-galling lubrication requirements before production.
Surface Finish Selection Guide
Plain stainless
Common for standard 316 hex bolts where the natural stainless surface is acceptable after production and cleaning.
Passivated
Available upon request to help remove surface contaminants and support corrosion resistance after manufacturing and handling.
Polished
Used when appearance is important for visible hardware, architectural fastening, marine fittings, or equipment panels.
Waxed or lubricated
Can be considered to reduce stainless thread galling risk during installation, especially with stainless nuts.
Cleaned and separated packing
Useful when buyers require clean surface condition and reduced risk of carbon steel contamination during storage and transport.
Custom surface treatment
Special cleaning, marking, polishing, or packing can be reviewed according to drawing and order requirement.
For applications near seawater or outdoor corrosion exposure, XZ Fastener’s guide on choosing fasteners for marine and offshore environments can help buyers check material, finish, and anti-loosening details.
Manufacturing and Quality Control
Stainless steel 316 hex bolts can be produced by material preparation, cold heading or machining depending on size, thread rolling or thread cutting, surface cleaning, passivation where required, sorting, and packing. For custom length, special thread, or drawing-based parts, manufacturing feasibility should be reviewed before production.
Quality control can include dimensional inspection, head size check, thread fit, material confirmation, surface condition review, passivation requirement, and packaging verification. For thread acceptance, go/no-go thread gauge testing can be arranged according to order requirement.
Aplicaciones
- Marine equipment, dock hardware, and coastal installations
- Outdoor machinery, brackets, panels, and support frames
- Chemical-adjacent equipment and corrosion-resistant assemblies
- Architectural hardware and visible fastening points
- Maintenance, repair, and export fastener kits with matching nuts and washers
Stainless steel 316 hex bolts are suitable when corrosion exposure is higher than a typical indoor 304 stainless application. For marine projects, buyers can review XZ Fastener’s marine fastener size guide and confirm bolt, nut, and washer sizes together.
For heavy structural strength, carbon steel alternatives with suitable coating may still be preferred, such as zinc plated DIN 933 bolts, black oxide DIN 933 bolts, or hot dip galvanized DIN 933 bolts according to project requirements.
How to Get a Faster Quotation
A complete inquiry helps XZ Fastener check material, standard, thread, strength class, finish, inspection, and packaging before quoting. For stainless steel 316 hex bolts, provide the standard, diameter, pitch, length, thread style, material description, strength class, quantity, and whether matching nuts and washers are required.
Recommended inquiry details
- Standard: DIN 933, DIN 931, ISO 4017, ISO 4014, ANSI / ASME, or drawing
- Material: 316, A4, SUS316, 316L, or project-specified stainless grade
- Strength class: A4-50, A4-70, A4-80, or custom requirement
- Size: diameter, pitch, length, and thread length if partial thread
- Finish, quantity, packing method, label requirement, and destination information
Useful attachments
- Technical drawing with tolerance and thread details
- Sample photos showing surface finish and head marking
- Assembly list for matching nuts and washers
- Inspection checklist or test report format
- Carton, pallet, barcode, or private label instructions
For direct project review, contact XZ Fastener with your size list and application details.
Preguntas frecuentes
Is stainless steel 316 the same as A4 stainless steel?
In many fastener purchasing documents, stainless steel 316 is commonly referred to as A4 stainless steel or SUS316. Buyers should still confirm the exact material description and required strength class before production.
Can stainless steel 316 hex bolts be supplied in A4-80?
Yes. A4-80 stainless steel hex bolts can be supplied according to order requirement. Buyers should state whether A4-70 or A4-80 is needed because the strength class affects production and inspection requirements.
Should I choose 304 or 316 stainless steel hex bolts?
304 is suitable for many general corrosion-resistant applications. 316 is usually preferred for chloride, coastal, marine, or more demanding outdoor environments. Share the application environment before quotation so the material can be reviewed.
Can 316 stainless steel hex bolts be supplied with matching nuts and washers?
Yes. XZ Fastener can supply 316 stainless steel hex bolts with matching stainless nuts and washers according to assembly requirement. Send the complete size list, quantity, finish, and packing requirements for review.
Do stainless steel 316 hex bolts need surface coating?
316 stainless steel is usually ordered plain, cleaned, polished, waxed, or passivated rather than zinc plated. If a special surface treatment is required, it should be confirmed with the drawing and application requirement.
What inspection can be arranged before shipment?
Inspection can include dimensions, thread gauge, material confirmation, surface condition, head marking, passivation requirement, and packaging checks. Required inspection documents should be listed in the inquiry.
Send Your Stainless Steel 316 Hex Bolt Inquiry
For a faster quotation, send your size list, finish, quantity, packaging, and inspection requirements. Please also include the standard, material description, strength class, thread type, matching nut or washer details, drawing files, and any test document requirements so XZ Fastener can review the complete order accurately.
Request a quote