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ss316 wing nut din 315 tool free fastening for marine and food grade equipment-0

Nut

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Corrosion-Resistant SS304/SS316 Wing Nut DIN 315 Tool-Free Fastening for Marine and Food Grade Equipment

Ergonomic Wing Design for Rapid Manual Assembly and High-Hygienic Environments

  • Overview
  • Key Features
  • Technical Specifications
  • Materials & Surface Finish
  • Applications
  • Customization Options
  • Company Strengths
  • Packing & Logistics
  • FAQ
  • Recommended Products

The DIN 315 Stainless Steel Wing Nut (Butterfly Nut) from Pyramid Hardware is the industry standard for applications requiring frequent, tool-free adjustment. Featuring two large, ergonomically designed "wings," these nuts allow operators to apply significant hand-torque for a secure hold without the need for wrenches or sockets. Our wing nuts are manufactured from premium 304 or 316 series stainless steel, making them impervious to rust, chemical corrosion, and extreme temperatures. This makes them the ideal choice for marine hardware, laboratory equipment, and food processing machinery where hygiene and speed of maintenance are critical factors.

Key Features

Tool-Free Operation:

  • The large wing span provides excellent leverage for hand-tightening and quick-release, significantly reducing downtime during setup.

Superior Corrosion Resistance:

  • Made from 100% Stainless Steel (SS304/SS316), these nuts will not rust even when exposed to salt water or harsh sanitizing chemicals.

Hygienic Design:

  • Smooth, rounded surfaces prevent the accumulation of bacteria and debris, making them compliant with food safety standards.

High-Strength Casting/Forging:

  • Our wing nuts are either cold-forged or investment-cast to ensure the wings do not snap off under heavy manual pressure.

Broad Temperature Range:

  • Capable of operating in environments from cryogenic temperatures up to 800°F without loss of structural integrity.

Technical Specifications

Parameter

Details

Standard

DIN 315 (Metric), ASME B18.6.9 (Imperial)

Size Range

M4 - M20; 1/4" - 3/4"

Thread Type

Metric Coarse, UNC, UNF

Material

Stainless Steel 304 (A2), Stainless Steel 316 (A4)

Finish

Passivated, Electropolished, or Satin Finish

Wing Shape

Rounded "German Type" or pointed "American Type"

Materials & Surface Finish

SS304 (1.4301):

  • Best for general outdoor use, food processing, and kitchen equipment.

SS316 (1.4401):

  • The "Marine Grade" option, containing molybdenum for resistance against chloride-induced pitting.

Surface Treatment:

Electropolishing:

  • Provides a mirror-like finish and removes surface impurities for maximum hygiene.

Pickling & Passivation:

  • Standard treatment to restore the protective chromium oxide layer.

Tumble Polishing:

  • Cost-effective method for a clean, professional appearance.

Applications

Marine Hardware:

1. Securing hatches, covers, and accessory mounts on boats and yachts.

Food & Beverage:

2. Used on adjustable guides and conveyor rails where daily washdowns occur.

Laboratory Equipment:

3. Fastening clamps and stands that require frequent reconfiguration.

Drum & Barrel Lids:

4. Quick-access closure systems for industrial containers.

Outdoor Signage:

5. Temporary or seasonal signage that needs to be moved or adjusted by hand.

Photography & Lighting:

6. Securing camera tripods and stage lighting brackets.

Customization Options

Customization

Availability

Details

Extra Wide Wings

Yes

For higher torque applications (Custom tooling)

Through-Hole or Blind

Yes

Standard through-hole or "cap" style wing nuts

Specialty Alloys

Yes

Monel or Inconel for extreme chemical resistance

Nylon Locking Patch

Yes

Added resistance to vibration-induced loosening

Company Strengths

Pyramid Hardware Fasteners is Egypt's leading specialist in stainless steel fasteners. Our Giza-based facility utilizes advanced investment casting and cold forging to produce 70+ varieties of nuts and bolts. We are ISO 9001:2015 and IATF 16949 certified, ensuring that our stainless steel products meet the rigorous demands of the global export market. Our OTD record of 98.5% and factory-direct pricing allow our international partners to maintain lean inventories while saving 15-30% on procurement costs.

Packing & Logistics

Standard:

  • Small inner boxes (100-500 pcs) inside master export cartons.

Ports:

  • Alexandria, Damietta.

Samples:

  • 10-15 days for production.

Bulk Delivery:

  • 15-25 working days.

FAQ

Q: Which is better for a swimming pool area, SS304 or SS316?

1. A: We strongly recommend SS316 for pool areas due to the high chlorine content which can cause rust on SS304.

Q: Are the wings strong enough for me to use a pair of pliers on them?

2. A: While designed for hand-tightening, our forged wing nuts can withstand occasional light tool use, but over-tightening with tools may damage the wings.

Q: Do you offer these with fine threads (e.g., M10x1.0)?

3. A: Yes, we can manufacture fine thread variants on a custom order basis.

Q: Can you provide a certificate of origin for EU customs?

4. A: Yes, we provide full EUR.1 or Arab League Certificates of Origin for tariff benefits.

Q: What is the maximum size you produce in wing nuts?

5. A: Our standard range goes up to M20, but we can produce larger sizes via investment casting.

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