A2-70 stainless steel flange nut

The fastening and opening of bolts and nuts adopts non-standard design, and the matching
non-standard tools are used to solve the opening and fastening problems. In general, other
wrenches cannot be inserted. In the appearance design of nuts and bolts, non-standard slotting,
opening or pentagonal, heptagonal, nine-corner or custom-made corresponding groove tools
have played a very good anti-theft effect

عملية الرأس على البارد هي واحدة من العمليات الجديدة للتشغيل الآلي بالضغط ذات القطع الأقل أو بدون قطع
المعدن. وهي طريقة معالجة تستخدم التشوه البلاستيكي للمعدن تحت تأثير
قوى خارجية، وبمساعدة القوالب، تقوم بإعادة توزيع ونقل حجم المعدن لتشكيل
الأجزاء أو الفراغات المطلوبة. عملية الخراطة على البارد هي الأكثر ملاءمة لإنتاج الأجزاء القياسية
أدوات التثبيت مثل البراغي والبراغي والصواميل والمسامير والمسامير والدبابيس وغيرها

A2-70 Stainless Steel Flange المكسرات – Complete Overview

1. Definition & Purpose

An A2-70 flange nut is a stainless steel locking nut with an integrated wide circular flange at its base. It is designed to distribute clamping pressure, reduce surface damage, and resist loosening under vibration.

إن “A2-70” designation specifies:

• A2: Austenitic stainless steel (Type 304 – 18% Cr, 8% Ni)

• 70: Minimum tensile strength of 700 MPa (with a proof load of 450 MPa)

2. Material Properties

• Corrosion Resistance: Excellent resistance to rust, water, and mild chemicals (suitable for outdoor, marine, and food-grade applications).

• Temperature Range: Typically performs well between -200°C to +400°C (varies based on environment).

• Magnetic Properties: Generally non-magnetic (but may become slightly magnetic after cold working).

3. Design Features

• Flange Type:

  • Flat Flange (Smooth): Standard load distribution.

  • Serrated Flange: Teeth on the underside grip the surface, preventing loosening from vibration.

• Thread Type: Metric (e.g., M6, M8, M10) or UNC/UNF (imperial).

• Finish: Typically natural mill finish (bright, uncoated stainless steel), but may also be dull polished or electropolished for specific uses.

6. Common Applications

• Automotive & Machinery: Engine components, exhaust systems, and vibrating equipment.

• Plumbing & HVAC: Piping, valves, and fluid systems.

• Marine & Offshore: Saltwater-resistant fastening.

8. Limitations

• Not for Extreme Chloride Exposure (e.g., constant saltwater submersion – A4-70 is better).

• Higher Cost than carbon steel or zinc-plated nuts.

• Limited High-Temp Use – May lose strength above 400°C.

Conclusion

إن A2-70 stainless steel flange nut is a high-strength, corrosion-resistant fastener ideal for applications requiring vibration resistance, load distribution, and durability.