Import Bolts — Buy in Bulk from Supplier in China

Ningbo Qunli Fastener Manufacture Co., Ltd. produces stainless steel bolts, cap screws, nuts, and socket screws from Zhenhai, Ningbo, Zhejiang Province, China. The source description highlights stainless steel construction and mentions custom manufacturing for bulk orders. For stainless steel bolts, common grades include A2-70 and A4-80 per ISO 3506-1, with A4 offering superior resistance to chlorides and acids.

The socket screws referenced are typically hexagon socket head cap screws per ISO 4762 or DIN 912, featuring a cylindrical head with an internal hex drive. Cap screws in the description likely refer to hexagon head cap screws per ISO 4017. Stainless steel socket screws deliver tensile strengths around 700 MPa for A2-70 and 800 MPa for A4-80, though the exact grade must be confirmed with the manufacturer. Passivation per ASTM A967 is a standard post-process to restore corrosion resistance after machining.

Buyers in automotive, machinery, and electronics sectors source these fasteners for assemblies requiring non-magnetic properties or corrosion immunity without additional coating. Ningbo Qunli offers custom manufacturing, so thread length, head style, and drive type can be tailored. For import orders, confirm the stainless steel grade certificate, passivation documentation, and dimensional inspection protocol before production begins.

Ningbo Qunli Fastener Manufacture Co., Ltd. is located at Xijingtang, Jiulonghu Town, Zhenhai, Ningbo 315205, Zhejiang Province, China. The supplier holds an imported tier and harbor trust tier classification. Response rate and average response hours are both recorded at zero, indicating no response history is available through this channel. The source description does not state the year of establishment, factory size, annual output, or employee count.

The company profile positions itself as a manufacturer rather than a pure trader, citing custom manufacturing capability for bulk orders. The source mentions ISO and SGS certifications but does not provide certificate numbers, scopes, or dates. No named clients, export percentages, or domestic sales ratios are listed. Buyers should request a factory audit report, business licence, and ISO scope certificate to verify manufacturing capability before placing customised orders.