About Ma Zhuojia - Fasteners Supplier in China

China is the origin of Ma Zhuojia, which lists twelve active products across fasteners, automobile spare parts, electric switches, pistons, and industrial valves. The catalogue includes items such as Strut Bump Stop (HS 4016.99) made from polyurethane/urethane/rubber composite, and Strut Dust Bellow (HS 4016.93) available in NBR, PUR, silicone, and BR compounds. Shock Gas Bladder and Shock Guard are both classified under HS 8708.80, using neoprene/EPDM rubber and high‑strength steel alloy respectively. Other listed components comprise Oil Seal Ring (HS 4016.93) with NBR rubber and steel inner ring, Mounting Bush (HS 8708.94) in polyurethane or silicone, Tie Rod End (HS 8708.99) forged heat‑treated steel, Sway Bar Link (HS 8708.80) grade 8.8/10.9 steel, and generic Fastener (HS 7318.15) in carbon or stainless steel grades. Each product aligns with the HS code families for rubber articles, vehicle parts, and metal fasteners, reflecting the supplier’s focus on automotive suspension and sealing solutions.

The listed fasteners cover carbon steel grades 8.8 and 10.9 as well as stainless steel 304 and 316, which are standard mechanical property specifications for automotive and industrial applications. Piston rings and oil seal rings are typical components for internal combustion engines, where hardness, wear resistance, and dimensional tolerance are critical. Valve shim stacks and industrial valves & gauges are used in hydraulic and pneumatic systems, often requiring pressure ratings up to several bar. The rubber‑based components such as bump stops, dust bellows, and mounting bushes employ NBR, EPDM, silicone, and polyurethane compounds that meet typical hardness ranges from 60 to 90 Shore A. These material selections are common in Chinese automotive OEM supply chains that export to Southeast Asian and European vehicle manufacturers.

Product Range and Specialties of Ma Zhuojia

Ma Zhuojia’s catalogue comprises twelve items, including Strut Bump Stop (polyurethane/urethane/rubber composite), Strut Dust Bellow (NBR, PUR, silicone, BR), Coil Spring Isolator (material not specified), Shock Gas Bladder (neoprene/EPDM rubber), Shock Guard (high‑strength steel alloy), Piston Ring, Oil Seal Ring (NBR with steel inner ring), Mounting Bush (PUR/NBR/silicone), Valve Shim Stack, Tie Rod End (forged steel with zinc/phosphate coating), Sway Bar Link (grade 8.8/10.9 steel), and Fastener (carbon steel 8.8/10.9, stainless 304/316). The product set targets automotive suspension, sealing and fastening functions that are standard in vehicle chassis and power‑train assemblies. Typical industry grades for the listed fasteners follow ISO 898‑1 tensile strength classes 8.8 (≈800 MPa) and 10.9 (≈1 000 MPa), while stainless variants meet ASTM A193 specifications for corrosion resistance. Rubber components are commonly produced to ISO 48 hardness and ASTM D2000 material designations, with Shore A values between 60 and 90 for vibration‑damping parts. Metal shank components such as Tie Rod Ends and Sway Bar Links are often heat‑treated to achieve a minimum yield strength of 640 MPa for grade 8.8 steel, and surface‑treated with zinc or phosphate for corrosion protection.

Trade and Export Information - Ma Zhuojia

Chinese exporters of automotive fasteners, suspension components and rubber seals typically ship to Europe, North America and Southeast Asia, where vehicle manufacturers and aftermarket distributors source OEM‑compatible parts. The HS code families present in the catalogue - 4016 for rubber articles, 8708 for vehicle parts, and 7318 for metal fasteners - are subject to customs duties that vary by destination, and many importers require a certificate of origin and a commercial invoice compliant with Incoterms such as FOB or CIF. Buyers in the EU often request CE marking or conformity to the European Union’s REACH regulation, while North American purchasers may look for ISO/TS 16949 or IATF 16949 certification as part of the automotive quality management system. Standard packaging includes bulk cartons or wooden pallets sized for 20‑ft and 40‑ft containers, with moisture‑resistant liners for rubber items and anti‑rust treatments for steel parts. Export documentation usually includes a test report for hardness (Shore A) or tensile strength (MPa), material safety data sheets, and, when applicable, a declaration of conformity to relevant standards.

Sourcing from Ma Zhuojia - Buyer Guidance

When sourcing from Ma Zhuojia, buyers should request a material data sheet that specifies the exact rubber compound (e.g., NBR, EPDM, silicone) and hardness, as well as the steel grade and heat‑treatment condition for metal parts. For fasteners, a tensile test report confirming compliance with ISO 898‑1 and a corrosion resistance certificate for stainless grades are typical verification documents. Samples of critical items such as oil seal rings or shock absorbers should be evaluated for dimensional tolerance, wear resistance and sealing performance before confirming bulk orders. Verify that the supplier can provide certificates of origin, ISO 9001 quality‑management certification, and any market‑specific approvals (CE, REACH, IATF 16949) that the buyer’s region requires.

What HS codes are used for the fasteners offered by Ma Zhuojia?

Fasteners are listed under HS code 7318.15, which covers threaded screws, bolts and similar metal fasteners. Buyers should confirm that the specific product dimensions and material grades match the HS description.

Which rubber materials are applied to the Strut Dust Bellow?

The Strut Dust Bellow is supplied in NBR, polyurethane (PUR), silicone and butadiene rubber (BR) compounds. Each material typically meets ISO 48 hardness specifications and can be selected based on temperature and oil‑resistance requirements.

What mechanical properties are expected for the Sway Bar Link?

The Sway Bar Link uses high‑strength steel of grade 8.8 or 10.9, which corresponds to a minimum tensile strength of 800 MPa or 1 000 MPa respectively. Heat‑treatment and a protective coating are standard to achieve the required yield strength and corrosion resistance.

Are certifications such as ISO 9001 or CE required for these automotive parts?

While Ma Zhuojia’s facts do not list specific certifications, buyers typically request ISO 9001 for quality management and CE marking or REACH compliance for automotive parts destined for the EU market.

What packaging formats are common for the rubber seal products?

Rubber seal items like Oil Seal Rings and Mounting Bushes are usually packed in moisture‑proof bulk cartons or sealed poly‑bags, placed on wooden pallets sized for 20‑ft or 40‑ft containers to prevent deformation during transit.

What sample size is advisable for testing the Shock Gas Bladder?

A representative sample of at least one unit per batch, accompanied by a hardness test (Shore A) and a pressure‑cycle test, allows buyers to verify the neoprene/EPDM compound’s performance before large‑scale purchase.

Which markets commonly import the listed automobile spare parts?

Typical import markets include the European Union, United States, Canada, Japan and ASEAN countries, where automotive manufacturers and aftermarket distributors source suspension and sealing components.

What documentation should be requested for the Valve Shim Stack?

Buyers should ask for a material test report indicating the metal grade, dimensional tolerance sheet, and pressure‑rating certification, as well as a declaration of conformity to relevant hydraulic‑system standards.