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Tool-Free Fine Adjustment | Corrosion-Resistant Precision | Metric M6–M30 Range
The Stainless Steel Round Nut is a precision fastening component engineered for applications requiring frequent, tool-free adjustment.Manufactured from premium-grade stainless steel, these round nuts feature a knurled circumference for reliable manual gripping and precision metric threads that deliver smooth, repeatable positioning in clamping fixtures, machine tooling, and adjustable assemblies.Available in both A2 (SS304) and A4 (SS316) grades, our round nuts combine the corrosion resistance of stainless steel with the dimensional accuracy demanded by precision engineering.
Knurled Circumference:
· The precision-cut knurled edge provides a comfortable, non-slip grip for manual adjustment without the need for spanner tools, speeding up setup and changeover operations.
Precision Metric Threading:
· Class 6H threads are rolled for accuracy and surface finish, ensuring smooth engagement and consistent clamping force every time.
A2 (304) & A4 (316) Grade Steel:
· SS304 offers excellent atmospheric corrosion resistance, while SS316 provides superior protection against chlorides, chemicals, and marine environments.
Spanner Hole Option:
· Available with two or four radial spanner holes for applications requiring controlled torque adjustment with a standard spanner.
Uniform Surface Finish:
· Passivated and optionally electropolished surfaces are free from burrs, making the nuts suitable for clean, food-grade, and laboratory environments.
| Parameter | Details |
| Standard | DIN 466 / DIN 467 / ISO 4035 / Custom |
| Material | Stainless Steel 304 (A2), 316 (A4) |
| Thread Range | M6 to M30 (metric coarse and fine pitch) |
| Outer Profile | Knurled round, with or without spanner holes |
| Thread Tolerance | Class 6H precision |
| Surface Finish | Passivated, matte, or electropolished |
| Hardness | HV 200 - 300 (annealed austenitic) |
| Tensile Strength | 500 - 700 N/mm² (Class 50/70) |
SS304 (A2):
· The general-purpose stainless grade for tooling, fixtures, and indoor precision equipment.
SS316 (A4):
· Molybdenum-enhanced grade for marine, chemical, and food-processing environments.
Passivated Finish:
· Chemical passivation removes surface iron and strengthens the protective chromium oxide layer.
Electropolishing:
· Optional mirror finish for semiconductor, medical, and clean-room applications.
Machine Tooling:
1. Adjustable stops, clamps, and positioning mechanisms on workholding fixtures.
Clamping Fixtures:
2. Quick manual tightening of jigs, vices, and modular clamping systems.
Adjustment Mechanisms:
3. Fine height and alignment adjustments on inspection and assembly equipment.
Laboratory Equipment:
4. Non-magnetic, corrosion-resistant hardware for scientific instruments.
Marine Hardware:
5. Deck and rigging components where salt-water resistance is essential (SS316).
Food Processing:
6. Hygienic fastening on washdown stations and stainless steel conveyor lines.
| Feature | Customization Range |
| Thread Pitch | Fine and extra-fine pitch threads produced to specification. |
| Knurl Pattern | Custom knurl depth, pitch, and width matched to your tooling. |
| Spanner Holes | Two or four holes with custom diameters and positions. |
| Marking | Laser etching of logo or part number on the face. |
| Dimensions | Non-standard diameters, heights, and profiles produced to drawing. |
Pyramid Hardware Fasteners is Egypt's premier manufacturer with over 15 years of excellence in the fastener industry. Located in 6th of October City, Giza, we operate an ISO 9001:2015 and IATF 16949 certified facility. Our factory is equipped with over 50 advanced cold-heading and thread-rolling machines, producing 70+ varieties of high-quality screws and bolts. We currently export to 30+ countries, maintaining a 98.5% On-Time Delivery (OTD) rate. By sourcing directly from our Egyptian facility, international buyers typically enjoy 15-30% cost savings compared to European or Asian distributors without compromising on quality.
Main Export Ports:
· Alexandria Port, Port Said Port, and Damietta Port.
Incoterms:
· FOB, CIF, CFR, and DDU.
Lead Times:
· Samples in 10-15 days; Bulk orders in 35-45 working days.
MOQ:
· 5000-10000 pieces per size (custom items quoted individually).
Packaging:
· Standard 25kg bulk cartons, small boxes, or palletized for large industrial orders.
Q: What is the difference between a round nut and a hex nut?
1. A: A round nut uses a knurled or spanner-hole circumference for adjustment rather than hex flats, making it ideal for frequent tool-free repositioning in fixtures and tooling.
Q: Can you produce round nuts with fine threads?
2. A: Yes, we produce both coarse and fine metric pitch threads in Class 6H tolerance, including custom pitches to match your existing spindle or screw threads.
Q: Are these nuts suitable for coastal or washdown environments?
3. A: For marine and washdown applications we recommend the A4 (SS316) grade, which offers superior resistance to chlorides and saline corrosion.
Q: Do you provide non-magnetic fasteners for sensitive equipment?
4. A: Austenitic stainless steel is essentially non-magnetic in its annealed state, making our round nuts suitable for MRI rooms, laboratories, and sensitive electronics.
Q: What is your MOQ for stainless steel round nuts?
5. A: Our standard MOQ is 500-1000 pieces per size, and we produce sample quantities within 10-15 days for qualification testing.
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