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MUKAU FASTENERS is a top-notch manufacturer and supplier based in Kinshasa, Congo, specializing in high-quality Stainless Steel 17-4 PH Washers. These washers are designed to deliver outstanding strength, corrosion resistance, and durability, making them perfect for tough industrial applications. Crafted from precipitation-hardening stainless steel, they boast excellent mechanical performance, dimensional stability, and resistance to stress and fatigue. MUKAU FASTENERS is committed to precision production and upholding international quality standards, providing 17-4 PH Washers that are ideal for sectors like aerospace, chemical processing, petrochemical, marine, and high-performance machinery, where reliable load distribution and secure fastening are crucial for long-term performance under stress, vibration, and moderately corrosive conditions.
Stainless Steel 17-4 PH Washers are made up of about 17–19% chromium, 3–5% nickel, 3–5% copper, and 0.07% carbon, with small amounts of niobium or tantalum added for precipitation hardening. They offer impressive tensile strength ranging from 930 to 1,200 MPa, along with high yield strength, excellent hardness, toughness, and fatigue resistance. Heat treatment further enhances their mechanical properties, ensuring they maintain dimensional stability and resist stress corrosion cracking, providing reliable performance in high-stress, moderately corrosive, and high-temperature settings. These washers are designed to uphold load-bearing integrity, prevent surface damage, and ensure secure fastening in critical industrial applications.
| Specifications | ASTM A 193 / ASME SA 193 |
| Standard | DIN, ISO ,JIS ,GB, IS, BS, ASTM and all International Standards |
| Size | M3 – M100 | 3/6″ – 4″ | Custom Sizes |
| Fasteners Length | 3 mm – 200 mm | Custom Sizes |
| Washers Size | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Grade | C | Cb+Ta | Cr | Cu | Fe | Mn | Ni | P | S | Si |
| SS 17-4 PH | 0.07 max | 0.15-0.45 | 15.00-17.50 | 3.00-5.00 | Bal | 1.0 max | 3.0-5.0 | 0.40 max | 0.03 max | 1.0 max |
To satisfy our clients needs by providing high quality products at competitive price as per the schedule and to maintain long term relationship with our clients.
Stainless Steel 17-4 PH Washers find extensive use in aerospace, chemical and petrochemical facilities, marine engineering, power generation, and high-performance industrial machinery, thanks to their exceptional strength and corrosion resistance. They excel at load distribution, surface protection, and securing bolts and nuts in high-stress, vibrating, or moderately corrosive environments, ensuring safe and long-lasting connections. The 17-4 PH grade guarantees durability and reliability, making these washers a go-to choice for demanding applications.
For transparency and reliability, we ensure that our stainless steel 17-4 pH washers are fully documented. Our documents include marketing documents, packaging documents, fumigation certificates, heat treatment protocols and quality control systems. In addition, each order is carefully packaged to prevent damage during transit. This careful effort ensures that our stainless steel 17-4 pH washers meet the highest industry standards and provide our customers with exceptional quality and performance.
Mukau Fasteners is a leading manufacturer and supplier of high-quality fasteners in Kinshasa, Congo, with over 8 years of experience serving global industries.
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