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العربية A4-80 stainless steel hex bolts manufacturer
XZ Fastener manufactures A4-80 stainless steel hex bolts for buyers who need both 316-type corrosion resistance and a higher stainless strength class. These bolts can be supplied according to DIN 933, DIN 931, ISO 4017, ISO 4014, ANSI / ASME, or customer drawings. A4-80 is commonly requested for marine, coastal, outdoor, chemical-adjacent, and demanding equipment assemblies where standard A4-70 may not meet the project requirement. Full thread, partial thread, metric, and inch options can be reviewed with matching nuts, washers, packaging, and inspection documents before production.
A4-80 stainless steel hex bolts can be supplied for corrosion-resistant assemblies requiring defined material, strength, thread fit, and documentation.
Quick Specs
What Buyers Should Know Before Sourcing A4-80 Stainless Steel Hex Bolts
A4-80 stainless steel hex bolts are not only a corrosion-resistant fastener choice; they also require confirmation of mechanical class. Buyers should define the dimensional standard, diameter, pitch, length, thread style, head marking, and matching nut class before placing an order.
A4 is commonly associated with 316 stainless steel, while 80 indicates a higher stainless strength class than A4-70. For material selection, buyers can compare A2 vs A4 stainless steel fasteners and review 304 vs 316 stainless steel bolts before confirming the final requirement.
Procurement checks
- Confirm A4-80 on the purchase order, drawing, and head marking requirement.
- State the standard, diameter, pitch, length, and full or partial thread style.
- Check whether the application needs A4 nuts and stainless washers.
- Confirm passivation, cleaning, or anti-galling lubrication requirements.
- Define inspection documents, packaging, and labels before quotation.
Common Purchasing Descriptions
A4-80 bolt descriptions
- A4-80 stainless steel hex bolts, DIN 933, full thread
- 316 stainless steel hex head bolts, ISO 4017, A4-80 strength class
- SUS316 metric hex head bolts, passivated, A4-80 marking
- A4-80 stainless steel partial thread hex bolts, DIN 931 / ISO 4014
- 316 stainless steel inch hex bolts, UNC or UNF thread, A4-80 equivalent requirement
Related comparison descriptions
- DIN 933 full thread hex bolts in A4-80 stainless steel or carbon steel
- Grade 8.8 carbon steel hex bolts where carbon steel strength is required
- Metric hex head bolts supplied in A4 stainless steel, A2 stainless steel, or carbon steel
- Zinc plated DIN 933 bolts for lower-corrosion indoor carbon steel assemblies
- Black oxide DIN 933 bolts or hot dip galvanized DIN 933 bolts for different carbon steel finish requirements
For buyers comparing standard A4 bolts with higher-strength stainless options, XZ Fastener’s A4-80 stainless steel bolts page can help clarify strength class and purchasing descriptions.
Detailed Specifications Table
| Specification Item | Common Options | Buyer Notes |
|---|---|---|
| Product type | Hex head bolt, full thread hex bolt, partial thread hex bolt, hex cap screw | Confirm head dimensions, length measurement, and whether the design requires full or partial thread. |
| Standards | DIN 933, DIN 931, ISO 4017, ISO 4014, ANSI / ASME B18.2.1, customer drawing | The selected standard affects head size, thread length, body diameter, and tolerance expectations. |
| Material | A4 stainless steel, 316 stainless steel, SUS316, 316L where specified | A4 / 316 is selected for stronger chloride and outdoor corrosion resistance than A2 / 304. |
| Strength class | A4-80 | Confirm mechanical class clearly. A4-80 should not be substituted with A4-70 without buyer approval. |
| Diameter range | Common metric sizes M5 to M36; inch sizes available upon request | Large sizes, special thread lengths, and non-standard parts should be reviewed with drawings. |
| Thread | Metric coarse, metric fine, UNC, UNF, special thread | Thread pitch and tolerance should match the nut. Thread inspection can be arranged according to order requirement. |
| Finish | Plain, passivated, polished, waxed, cleaned, custom surface treatment | Passivation, cleaning, and waxed finish can be reviewed to support surface condition and installation behavior. |
| Matching parts | A4 stainless nuts, A4 flat washers, spring washers, lock nuts, custom washers | Use compatible stainless parts. XZ Fastener provides guidance on matching stainless steel bolts, nuts, and washers. |
| Inspection | Dimensions, thread gauge, material confirmation, strength class review, surface condition, packing check | Material documents and mechanical inspection requirements should be listed before quotation. |
| Packaging | Bulk cartons, small boxes, bags, kits, pallets, labels, customer-specified packing | Stainless bolts should be packed to reduce scratches and avoid mixed-material contamination. |
For full thread metric bolt dimensions, buyers can compare related 316 stainless steel full thread hex bolts when confirming size range and product style.
Material and Grade Explanation
A4 stainless steel is commonly associated with 316 stainless steel. It contains molybdenum, which helps improve resistance in chloride, coastal, marine, and demanding outdoor environments compared with A2 / 304 stainless steel. A4-80 adds a defined higher stainless strength class, so both material and mechanical class must be stated clearly.
A4-80 stainless steel hex bolts are often chosen where corrosion resistance and stronger stainless performance are needed together. They should not be treated as a direct replacement for Grade 8.8 carbon steel hex bolts unless the engineer has checked the design. For corrosion-sensitive projects, XZ Fastener’s marine and offshore fastener guide can help buyers review material and assembly details.
Grade confirmation reminders
- State A4-80 on the inquiry and drawing when required.
- Confirm whether head marking is required for the order.
- Match bolt strength class with compatible nut and washer requirements.
- Check the environment before choosing A4 instead of A2 or coated carbon steel.
- Request mechanical and material documents when the project requires traceability.
Surface Finish Selection Guide
Plain stainless
Common for A4-80 hex bolts where the natural stainless surface is acceptable after manufacturing and cleaning.
Passivated
Available upon request to help remove surface contaminants and support corrosion resistance after forming, machining, or handling.
Polished
Used when visible hardware, marine fittings, equipment panels, or architectural assemblies require a cleaner appearance.
Waxed or lubricated
Can be considered to reduce stainless thread galling risk during installation, especially when paired with stainless nuts.
Cleaned and separated packing
Useful when buyers require reduced surface contamination and protection from carbon steel contact during storage and transport.
Custom surface treatment
Special cleaning, marking, polishing, or packaging can be reviewed according to drawing and order requirement.
For material and finish decisions across zinc, hot dip galvanized, stainless steel, and other systems, XZ Fastener’s corrosion resistance comparison can help buyers choose a suitable fastening package.
Manufacturing and Quality Control
A4-80 stainless steel hex bolt production may include material preparation, cold heading or machining depending on size, thread rolling or thread cutting, surface cleaning, passivation where specified, sorting, and packing. Because A4-80 is a defined strength class, mechanical and material requirements should be confirmed before production.
Quality control can include head dimensions, bolt length, thread fit, material confirmation, surface condition, strength class review, head marking, and packaging verification. For thread acceptance, go/no-go thread gauge testing can be arranged according to order requirement.
Applications
- Marine equipment, coastal structures, and dock hardware
- Outdoor machinery, support frames, and exposed equipment panels
- Chemical-adjacent equipment and corrosion-resistant assemblies
- Architectural hardware requiring stainless appearance and defined strength
- Maintenance, repair, and export fastener kits with matching A4 nuts and washers
A4-80 stainless steel hex bolts are suitable when both corrosion resistance and a higher stainless strength class matter. For marine projects, XZ Fastener’s marine fastener size guide can help buyers confirm bolt, nut, and washer sizes together.
For heavy structural strength where stainless corrosion resistance is not required, carbon steel bolts with suitable finish may still be reviewed, including 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, surface condition, inspection, and packaging before quoting. For A4-80 stainless steel 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: A4, 316, SUS316, 316L, or project-specified stainless grade
- Strength class: A4-80, with marking requirement if applicable
- 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.
FAQ
What does A4-80 mean for stainless steel hex bolts?
A4 refers to 316-type stainless steel material, while 80 indicates a higher stainless strength class. Buyers should confirm both material and strength class in the order description.
Can A4-80 stainless steel hex bolts be supplied according to DIN 933?
Yes. A4-80 stainless steel hex bolts can be supplied according to DIN 933 full thread dimensions when size, pitch, length, material, and marking requirements are confirmed.
Should I choose A4-70 or A4-80?
A4-70 is common for many stainless bolt assemblies, while A4-80 is selected when a higher stainless strength class is required. The final choice should follow the drawing, project specification, or engineering requirement.
Can A4-80 bolts be supplied with matching nuts and washers?
Yes. XZ Fastener can supply A4-80 stainless steel hex bolts with compatible stainless nuts and washers according to assembly requirement. Send the complete size list, finish, quantity, and packing requirements for review.
Do A4-80 stainless steel hex bolts need passivation?
Passivation is available upon request and may be useful when the buyer wants improved surface condition after manufacturing and handling. The requirement should be confirmed before quotation.
What inspection documents can be arranged?
Inspection can include dimensions, thread gauge, material confirmation, strength class review, surface condition, head marking, and packaging checks. Required inspection documents should be listed in the inquiry.
Send Your A4-80 Stainless Steel Hex Bolt Inquiry
For a faster quotation, send your size list, finish, quantity, packaging, and inspection requirements. Please also include the standard, material description, A4-80 strength class requirement, thread type, matching nut or washer details, drawing files, head marking requirement, and any test document requirements so XZ Fastener can review the complete order accurately.
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