stainless steel flange nuts factory for DIN 6923 and Custom Metric Orders
XZ Fastener supplies stainless steel flange nuts for machinery, construction hardware, automotive brackets, electrical equipment, and outdoor assemblies where corrosion resistance and stable clamping matter. Buyers can specify DIN 6923, ISO-style dimensions, serrated or non-serrated flange faces, metric coarse threads, and A2 or A4 stainless steel materials according to order requirement. For mixed fastener packages, stainless flange nuts can be quoted together with bolts, washers, anchors, and other fastener products to simplify sourcing, packaging, and shipment coordination.
Quick Specs
What Buyers Should Know Before Sourcing Stainless Steel Flange Nuts
Flange nuts combine a hex nut body with an integrated washer-like bearing face. This helps spread load over a larger contact area and can reduce the number of separate washers in many assemblies. For serrated flange nuts, the underside teeth increase resistance to loosening on suitable mating surfaces, but they can mark soft or coated parts. When the contact surface must remain smooth, non-serrated flange nuts are usually the safer choice.
For metric projects, many buyers reference DIN 6923 flange nuts. If the order involves stainless bolts, washers, and nuts as one assembly, review material pairing and galling risk using this guide to matching stainless steel bolts, nuts, and washers.
Key Sourcing Points
- Confirm serrated or non-serrated flange face before pricing.
- Specify thread size, pitch, tolerance, and whether Go/No-Go gauge inspection is required.
- Choose A2 stainless steel for general corrosion resistance and A4 stainless steel for marine, chemical, or chloride exposure.
- Check flange diameter, across-flat dimension, and total height against the mating hole and wrench clearance.
- For anti-loosening assemblies, confirm whether torque testing or prevailing torque requirements apply.
Common Purchasing Descriptions
Clear descriptions reduce back-and-forth during quotation and help avoid material, thread, and finish mismatches. Buyers commonly send stainless steel flange nut requirements in the following formats:
- DIN 6923 A2-70 stainless steel serrated flange nuts, M6-M20, metric coarse thread, plain/passivated.
- A4-80 stainless steel hex flange nuts, M8, M10, M12, M16, for outdoor machinery assembly.
- Non-serrated stainless steel flange nuts according to drawing, 304 material, polished bearing surface.
- Flange lock nuts for equipment brackets, stainless steel 316, carton and pallet packaging.
- Assembly order with stainless flange nuts, flat washers, and metric hex head bolts.
- Mixed shipment including DIN 933 full thread hex bolts, Grade 8.8 carbon steel hex bolts, zinc plated DIN 933 bolts, black oxide DIN 933 bolts, and hot dip galvanized DIN 933 bolts for distributor stock.
For broader paired parts, XZ Fastener can also discuss flange bolts and nuts so thread fit, finish compatibility, and packaging labels are aligned before production.
Detailed Specifications Table
| Specification Item | Typical Options | Purchasing Notes |
|---|---|---|
| Tipo de producto | Hex flange nut, serrated flange nut, non-serrated flange nut, flange lock nut | Send a drawing if the flange OD, serration profile, or height differs from standard dimensions. |
| Standard Reference | DIN 6923, ISO 4161 style, ASME B18.2.2 inch style, custom drawing | Standard name alone may not define all order details; size, pitch, material, and finish still need confirmation. |
| Rango de tamaños | Common metric sizes M4-M24; larger or inch sizes upon request | MOQ and lead time may vary for uncommon sizes or special tooling. |
| Thread | Metric coarse, metric fine, UNC, UNF | State pitch clearly, especially for M10, M12, and inch-thread orders. |
| Material | 304/A2 stainless steel, 316/A4 stainless steel, 316L, carbon steel | A4/316 is preferred for chloride, coastal, marine, and chemical environments. |
| Property Class | A2-50, A2-70, A4-70, A4-80; carbon steel class 8 or class 10 alternatives | For critical assemblies, confirm required mechanical test documents before ordering. |
| Finish | Plain, passivated, bright cleaned, lubricated, waxed, or project-specific finish | Lubrication can help reduce galling during stainless-on-stainless tightening. |
| Inspection | Dimension check, thread gauge, visual inspection, hardness or tensile test as required | Inspection reports can be supplied according to order requirement. |
| Packaging | Bulk carton, small box, bag, carton with pallet, buyer label | Include unit weight, carton limit, barcode, and pallet requirement when needed. |
Material and Grade Explanation
A2 / 304 stainless steel is a common choice for general machinery, indoor equipment, electrical cabinets, and many construction hardware applications. It offers practical corrosion resistance and good availability across standard metric sizes.
A4 / 316 stainless steel provides better resistance in chloride, marine, coastal, and chemical environments. It is often selected for outdoor equipment, water treatment systems, marine hardware, and export projects with stricter corrosion expectations.
A4-80 or A2-70 property class may be requested when higher strength is required. Buyers should confirm whether the matching bolt grade, tightening method, and joint design are suitable for the requested nut class.
Custom Material Requests
When standard flange nuts do not meet the assembly requirement, XZ Fastener can review drawings, samples, and application details for custom fasteners. Optional requests may include altered flange diameter, special thread pitch, non-standard height, specific bearing-face design, or controlled surface roughness.
Surface Finish Selection Guide
Stainless steel flange nuts are often ordered plain or passivated because the corrosion resistance comes mainly from the stainless material itself. Finish selection should consider the mating bolt, environment, storage conditions, and assembly method.
| Finish Option | Suitable Use | Buyer Consideration |
|---|---|---|
| Plain Stainless | General stainless assemblies, indoor machinery, clean appearance | Cost-effective for many applications; confirm cleaning requirement if appearance is important. |
| Passivated Stainless | Outdoor, wet, marine-adjacent, and corrosion-sensitive assemblies | Helps improve surface condition after manufacturing and handling. |
| Lubricated or Waxed | Stainless-on-stainless tightening where galling risk must be reduced | Confirm whether the lubricant affects torque values or cleanliness requirements. |
| Zinc Plating | Carbon steel flange nuts or matching carbon steel bolt packages | Common for distributor stock; check required salt spray hours and plating color. |
| Hot Dip Galvanizing | Carbon steel outdoor structures and heavy-duty assemblies | Thread fit must be controlled because coating thickness affects assembly. |
| Black Oxide | Carbon steel indoor equipment, dark appearance, light oil protection | Not a substitute for strong outdoor corrosion resistance. |
If nuts, washers, and bolts are sourced as one package, use a consistent selection logic. This surface finish selection guide explains how coating choices affect the full assembly.
Manufacturing and Quality Control
Stainless steel flange nuts are typically produced through cold forming for common sizes and suitable volumes. Larger sizes, special materials, or non-standard geometry may require hot forging, machining, or a combined process. After forming, the nut is tapped, cleaned, inspected, and packed according to the confirmed order requirement.
Quality control can include raw material verification, dimensional inspection, thread Go/No-Go gauge checking, flange diameter measurement, across-flat inspection, visual surface checks, and sampling before packing. For project orders, inspection reports, material documents, and special packaging photos can be discussed before production.
Useful Checks Before Approval
- Confirm nut runs freely on the mating bolt without thread damage.
- Check bearing face contact on the actual assembly surface.
- Review serration direction and bite condition when anti-loosening is required.
- Confirm package labels match size, material, finish, batch, and quantity.
- Use technical guides for related fastener selection and inspection topics.
Aplicaciones
Machinery and Equipment
Used on machine frames, guards, brackets, guide rails, and covers where integrated bearing area simplifies installation.
Automotive and Transport
Suitable for brackets, clamps, body hardware, and maintenance kits where vibration resistance and repeatable assembly matter.
Construction Hardware
Applied in metal frames, rail supports, façade brackets, solar mounting accessories, and general structural hardware.
Marine and Outdoor Use
A4/316 stainless flange nuts are preferred where moisture, salt, or aggressive outdoor exposure must be considered.
Electrical Cabinets
Used for panels, mounting plates, grounding brackets, and stainless cabinet hardware requiring clean assembly.
Distributor Stock
Common sizes can be packed in buyer-specified cartons, bags, labels, and pallets for warehouse receiving.
How to Get a Faster Quotation
A clear request helps the factory quote the correct material, tooling, inspection, and packaging from the first round.
- Send the standard or drawing: DIN 6923, ISO style, ASME style, or custom drawing.
- List the size and pitch: for example, M6, M8, M10, M12, M16 or UNC/UNF inch thread.
- Confirm stainless grade and property class: A2-70, A4-70, A4-80, 304, 316, or 316L.
- State serrated or non-serrated flange face.
- Provide quantity by size and expected delivery schedule.
- Share finish, lubrication, passivation, or cleaning requirement.
- Specify packaging: bulk carton, small box, bag, pallet, barcode, neutral label, or buyer label.
- Include inspection requirements, such as thread gauge, dimensional report, material document, or pre-shipment photos.
Preguntas frecuentes
Can stainless steel flange nuts be supplied according to DIN 6923?
Yes. Stainless steel flange nuts can be supplied according to DIN 6923 dimensions or adjusted to a buyer drawing. Please confirm size, pitch, material, serrated or non-serrated underside, and required inspection documents.
Should I choose A2 or A4 stainless steel for flange nuts?
A2/304 is suitable for many general industrial and indoor uses. A4/316 is recommended for marine, coastal, chemical, wet, or chloride-exposed environments where stronger corrosion resistance is needed.
What is the difference between serrated and non-serrated flange nuts?
Serrated flange nuts have teeth under the flange to help resist loosening on suitable surfaces. Non-serrated flange nuts provide a smoother bearing face and are preferred when the mating surface should not be marked.
Can flange nuts be quoted with matching bolts and washers?
Yes. Buyers often request flange nuts together with washers and bolts, including metric hex head bolts and DIN 933 full thread hex bolts. Provide the full size list so thread fit, material pairing, finish, and packaging can be checked together.
Can XZ Fastener supply custom stainless steel flange nuts?
Custom stainless steel flange nuts can be reviewed according to drawing, sample, or application requirement. Details such as flange diameter, height, thread pitch, serration profile, material, and inspection level should be included.
What information is needed for inspection before shipment?
Buyers should state whether dimensional inspection, thread Go/No-Go gauge checking, material documents, hardness testing, surface inspection, or packaging photos are required. Requirements should be confirmed before production starts.
Send Your Stainless Steel Flange Nut Inquiry
For a faster quotation, send your size list, material grade, finish, quantity, packaging method, and inspection requirements. If the flange nut is part of an assembly, include the matching bolt and washer details so thread fit and surface compatibility can be reviewed together.
Contact XZ Fastener
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