About Boss Trading Co. - Nuts Supplier in China

Based in China, Boss Trading Co. currently lists six distinct products in its catalogue. The range includes pipe fittings for nipple and elbow (HS code 7307.19, made from malleable iron conforming to ASTM A197 Grade 220-10), various spring and wire forms such as tension and torsion springs, coil and spiry springs, spring clips, steel wire rings and snap rings, a metal spring and steel wire forming product (HS code 7217.10, using high‑carbon steel wire and oil‑tempered spring steel), and stainless‑steel pipe and press fittings (HS code 7307.29, fabricated from stainless steel grades 304/316).

The supplier’s top categories are listed as Nuts, Flanges, Slip Rings, Steel Wires, and Stainless Steel Pipes & Pipe Fittings, reflecting a focus on mechanical and metal components. Although nuts are not detailed in the catalogue, the six active items cover both the pipe‑fitting segment and the spring‑wire segment, providing a combined offering of forged fittings, stainless steel pressure fittings, and various spring‑grade steel wire products.

Product Range and Specialties of Boss Trading Co.

Boss Trading Co.’s catalogue comprises pipe fittings for nipple and elbow (HS 7307.19) fabricated from ASTM A197 malleable iron, a material typically supplied in grades 220‑10 to 260‑10 for pressure‑class applications. The stainless‑steel pipe fitting line (HS 7307.29) uses grades 304 and 316, which meet ASTM A312 specifications for corrosion resistance in water, oil and chemical pipelines. The spring and wire products fall under HS 7217.10 and are commonly produced from high‑carbon (≈0.80 % C) oil‑tempered spring steel such as grades 1075‑1095, delivering tensile strengths of 1 200  -  1 600 MPa and hardness 45‑55 HRC. Industry standards for springs include ISO 9001 quality management, ASTM A228 for music‑wire springs, and DIN 17230 for compression springs. Typical dimensions range from 5 mm to 150 mm coil diameters, and wire rings are supplied in sizes 2 mm to 30 mm with tensile load capacities up to 5 kN.

Trade and Export Information - Boss Trading Co.

China is a major exporter of metal fittings and spring products, with shipments primarily destined for automotive manufacturers in Southeast Asia, construction and infrastructure projects in the Middle East, and oil‑field equipment suppliers in Europe and North America. HS 7307 products are classified under Chapter 73 (Articles of iron or steel) and usually require a mill test certificate and compliance with ASTM or EN standards; HS 7217 items fall under Chapter 72 (Iron and steel) and are often inspected for chemical composition and mechanical properties. Buyers typically request ISO 9001 or CE conformity, especially for pipe fittings used in regulated sectors. Standard export logistics involve loading the fittings in wooden crates or bulk pallets for 20‑ft or 40‑ft containers, with common Incoterms such as FOB Shanghai or CIF Hamburg.

Sourcing from Boss Trading Co. - Buyer Guidance

When sourcing from Boss Trading Co., buyers should ask for mill test reports that confirm the chemical makeup of the malleable iron (e.g., carbon ≤0.30 %) and stainless steel (e.g., chromium ≥18 %). For spring and wire items, a tensile test report and hardness measurement (e.g., 45‑55 HRC) are standard verification documents. Requesting ISO 9001 or CE certificates helps confirm that the supplier’s quality system aligns with typical import requirements. Sample orders of 5‑10 units are customary to evaluate fit and finish, and lead times of 15‑30 days are common for forged fittings and spring steel products, subject to production scheduling.

What pipe fitting types does Boss Trading Co. offer?

They list pipe fittings for nipple and elbow made from malleable iron (HS 7307.19) and stainless‑steel press fittings (HS 7307.29) in grades 304/316.

Which material standards apply to the malleable iron fittings?

The fittings conform to ASTM A197 Grade 220‑10, a standard used for pressure‑class malleable iron components.

What spring steel grades are used for the metal spring and wire forming product?

The product is specified as high‑carbon, oil‑tempered spring steel, comparable to grades 1075‑1095 that meet ASTM A228 tensile and hardness requirements.

Which certifications should a buyer request for these products?

Buyers normally request a mill test certificate, ISO 9001 quality‑system certificate, and, where applicable, CE marking for pipe fittings used in regulated markets.

What are typical packaging and shipping methods?

Items are packed in wooden crates or bulk pallets, loaded into 20‑ft or 40‑ft containers, with common Incoterms such as FOB Shanghai or CIF destination port.

What is the usual minimum order quantity and lead time?

Sample quantities of 5‑10 pieces are typical; standard production lead time ranges from 15 to 30 days after order confirmation.

How are steel wire rings and snap rings classified?

They fall under HS 7217.10 and are manufactured from high‑carbon steel wire, often supplied in diameters from 2 mm to 30 mm.

Which markets typically import these Chinese fittings and springs?

Major importers include automotive assemblers in Southeast Asia, pipeline contractors in the Middle East, and equipment manufacturers in Europe and North America.