Import Din 931 Half Threaded Hex Bolt — Buy in wholesale FOB from Supplier in China

Din 931 Half Threaded Hex Bolts from Ningbo Steel Bolt Co., Ltd are industrial fasteners designed for applications requiring a threaded section and an unthreaded shank, allowing for precise clamping without thread interference. These bolts feature a hexagonal head, a partially threaded shaft, and a chamfered point, manufactured to ISO 4014 standards. Available in carbon steel, alloy steel, and stainless steel, with grades from 4.8 to 12.9, they are widely used in structural and mechanical assemblies where load distribution is critical.

The unthreaded portion of the shank provides better shear resistance and reduces stress concentration near the joint. Thread length is typically 1.5 to 2 times the nominal diameter, with the remainder as smooth shank. Surface finishes include plain, zinc-plated, and black oxide, each offering distinct corrosion resistance profiles. Stainless steel variants are typically A2 or A4, suitable for wet or corrosive environments. Production uses cold forming and thread rolling to ensure dimensional consistency and surface integrity.

Buyers include construction equipment manufacturers, agricultural machinery producers, and industrial automation integrators who require reliable, reusable fastening solutions. Orders are typically placed in cartons or palletized quantities, shipped from Shanghai or Ningbo ports under T/T payment terms. Monthly supply capacity is 100,000 pieces. Buyers must specify thread length, shank diameter, and finish to ensure compatibility with mating components. Confirm compliance with ISO 4014 before bulk purchase.

Ningbo Steel Bolt Co., Ltd operates from Zhenhai District in Ningbo, Zhejiang, a region known for precision fastener manufacturing. The company is listed with a harbor trust tier, indicating it has met basic verification requirements for business registration and factory location. There is no public data on years in operation, employee count, or export history. The supplier's listing confirms production capability and standard product lines but does not claim certifications, client names, or production volume beyond stated monthly capacity.

The supplier responds to inquiries at a rate of 0.00%, with no recorded average response time, suggesting limited or no active communication channel. Buyers should treat this as a manufacturer with documented output capacity but unverified responsiveness. All claims in the listing are limited to material, grade, and packaging details. No claims are made regarding ISO certification, quality control processes, or in-house testing facilities. Direct confirmation of specifications is required before order placement.