Double Head Bolt

Double head bolts from Shanghai T & Y Hardware Industry Co., Ltd. are manufactured to DIN, ANSI, JIS, and IFI standards, with sizes ranging from M8 to M20 or 3/8 inch to 7/8 inch. Threads follow either metric, UNC, or UNF profiles depending on application requirements. Surface finishes include plain, zinc plating, hot-dip galvanised, DAC, and Geomet, each selected for corrosion resistance or aesthetic needs in industrial environments. These bolts are produced using carbon steel, alloy steel, or stainless steel grades as specified by the buyer.

Material composition follows standard industry classifications: carbon steel conforms to ASTM A307 Grade A or B, alloy steel to ASTM A449, and stainless steel to AISI 304 or 316. Thread tolerances adhere to ISO 965-1 for metric and ASME B1.1 for inch threads. Surface treatments are applied uniformly, with zinc plating typically at 5 to 15 microns and hot-dip galvanising at 45 to 85 microns. Quality control is maintained under ISO 9001 procedures, though no third-party certification documents are provided in the listing.

These bolts are commonly used in structural assemblies, machinery frames, and pipeline flanges where double-ended threading allows for nut engagement on both ends. Buyers include manufacturers in automotive, construction, and heavy equipment sectors. Packaging options are small boxes, poly bags, cartons on pallets, and bulk shipments. Delivery time is approximately 30 days, subject to order volume. Payment terms accepted are telegraphic transfer, letter of credit, or Western Union.

Shanghai T & Y Hardware Industry Co., Ltd. is based in Songjiang, Shanghai, with a registered address at Rm. 509, Building 1, No. 388, Xinfu Rd. The company is classified as an imported supplier with harbor-tier trust verification. There is no public information on years in operation, employee count, or annual turnover. The listing confirms production capability for double head bolts under international standards but does not list client names, export volume, or factory audits.

The supplier responds to inquiries with zero recorded response rate and no average response time, indicating limited or no active communication through the platform. No certifications beyond ISO 9001 are mentioned, and no product test reports or material traceability data are provided. Buyers should request documentation directly before placing orders.