ASTM A194 Stainless Steel 347 / 347H Nuts

Stainless Steel, 347 and 347H Nuts are popular fasteners in numerous applications. These nuts are known for their high resistance to corrosion and oxidation, making them suitable for use in harsh environments. Stainless steel nuts are available in various grades, each with unique properties. Stainless Steel 347 Nuts are available in different types, each with unique properties. The most common types include hex, lock, wing, coupling, and flange nuts. Hex nuts are the most widely used, featuring six sides and a standard thread pattern. Locknuts, however, are designed to prevent accidental loosening and can hold up to vibration and shock. Wing nuts are used for applications where easy hand tightening and removal are needed, such as household applications. They are identifiable by their wing-shaped projections on opposite sides of the nut.

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Stainless Steel 347H Nuts are widely used in various industries, including oil and gas, chemical and food processing. These nuts are known for their high-temperature resistance and corrosion resistance properties. They are also used in high-pressure and high-stress applications. The aerospace industry relies on stainless steel 347H nuts because of their strength, reliability, and lightweight characteristics. They are also used in the automotive industry for their superior strength and durability.

One of the benefits of stainless steel 347 and 347H nuts is their high resistance to heat and corrosion. These nuts can withstand temperatures up to 800°F (426°C) without losing strength or shape. They are also resistant to chemicals and acids, making them suitable for harsh environments. Stainless steel 347 and 347H nuts are durable and long-lasting, requiring little maintenance. They are also easy to clean, making them ideal for food processing and pharmaceutical industries.

Another benefit of stainless steel 347 and 347H nuts is their availability in various sizes and shapes. That makes it easy for engineers to find the right nuts for their application needs. They are also easy to install and remove, making them a cost-effective option for various applications. Furthermore, stainless steel nuts do not rust or corrode, making them a reliable choice for marine applications.

Stainless steel 347 and 347H nuts are versatile fasteners that offer various benefits. They are an ideal choice for high-temperature, high-pressure, and high-stress applications. Moreover, their chemical and corrosion-resistant properties make them an excellent choice for harsh environments. Stainless steel nuts are reliable, durable, and require little maintenance, making them cost-effective in the long run.


ASTM A194 Stainless Steel 347 nuts offer excellent corrosion resistance, particularly against sensitization and intergranular corrosion. Adding niobium (columbium) to the stainless steel composition helps prevent the formation of chromium carbide precipitates, which can lead to sensitization and subsequent intergranular corrosion.

Yes, ASTM A194 Stainless Steel 347 nuts are designed to perform well at high temperatures. Stainless Steel 347 exhibits good mechanical properties & oxidation resistance at elevated temperatures. This makes the nuts suitable for high-temperature applications, such as heat exchangers, furnace equipment, and exhaust systems.

Stainless Steel 347H nuts can generally withstand elevated temperatures up to approximately 1000°C (1832°F). However, the specific temperature limits may vary depending on factors such as the duration of exposure & the application requirements.

Specification of Stainless Steel 347 / 347H Nuts

Spec bag
Spec Nuts
Specifications: ASTM A194 / ASME SA194
Standard: DIN, ASTM, BS and all International Standards
Length: 3 mm to 200 mm
Nut Size: M3 - M56 | 3/6" to 2" | Custom Sizes
Heat Treatment: Annealing, Stress Relieving, Case Hardening, Quenching and Tempering.

Types of Stainless Steel 347 / 347H Nuts

Stainless Steel 347 / 347H Hex Nuts

Stainless Steel 347 / 347H Hex Nut

  • - ASTM A194 SS 347 Hex Nut
  • - S34700/S34709 Hex Nut
  • - 1.4550 / 1.4961 Hex Nut
  • - 347H SS Heavy Hex Nuts
  • - ASME SA194 SS 347H Hex Nut
  • - SS 347 Hex Nuts Supplier
  • - SS 347H Hex Nuts Manufacturer
Stainless Steel 347 / 347H Nylock Nuts

Stainless Steel 347 / 347H Nylock Nut

  • - ASTM A194 SS 347 Nylock Nut
  • - S34700/S34709 Nylock Nut
  • - 1.4550 / 1.4961 Nylock Nut
  • - 347H SS Nylock Nuts
  • - ASME SA194 SS 347H Nylock Nut
  • - SS 347 Nylock Nuts Supplier
  • - SS 347H Nylock Nuts Manufacturer
Stainless Steel 347 / 347H Wing Nuts

Stainless Steel 347 / 347H Wing Nut

  • - ASTM A194 SS 347 Wing Nut
  • - S34700/S34709 Wing Nut
  • - 1.4550 / 1.4961 Wing Nut
  • - 347H SS Wing Nuts
  • - ASME SA194 SS 347H Wing Nut
  • - SS 347 Wing Nuts Supplier
  • - SS 347H Wing Nuts Manufacturer
Stainless Steel 347 / 347H Square Nuts

Stainless Steel 347 / 347H Square Nut

  • - ASTM A194 SS 347 Square Nut
  • - S34700/S34709 Square Nut
  • - 1.4550 / 1.4961 Square Nut
  • - 347H SS Square Nuts
  • - ASME SA194 SS 347H Square Nut
  • - SS 347 Square Nuts Supplier
  • - SS 347H Square Nuts Manufacturer

Equivalent Grades for Stainless Steel 347 / 347H Nuts

STANDARD WERKSTOFF NR. UNS JIS GOST EN
SS 347 1.4550 S34700 SUS 347 08Ch18N12B X6CrNiNb18-10
SS 347H 1.4961 S34709 SUS 347H - X6CrNiNb18-12

Stainless Steel 347 / 347H Nuts Chemical Composition

Grade C Mn Si P S Cr Cb Ni Fe
SS 347 0.08 max 2.0 max 1.0 max 0.045 max 0.030 max 17.00 - 20.00 10xC – 1.10 9.00 - 13.00 62.74 min
SS 347H 0.04 – 0.10 2.0 max 1.0 max 0.045 max 0.030 max 17.00 - 19.00 8xC – 1.10 9.0 -13.0 63.72 min

Mechanical Properties of Stainless Steel 347 / 347H Nuts

Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
8.0 g/cm3 1454 °C (2650 °F) Psi – 75000 , MPa – 515 Psi – 30000 , MPa – 205 35 %

Application Industries

  • Refineries
  • Petrochemicals Industry
  • Oil & Gas Industry
  • Mining
  • Construction
  • Pharmaceuticals
  • Automobile