Inspection Workflow-Hebei Zhongjiu Energy Technology Co., Ltd.

Physical Inspection(1) Appearance: Random inspection of raw material surface shows no cracks, folds, lamination, rust, or other defects. Surface roughness meets process requirements.
(2) Dimensions: Measurement of core parameters such as raw material diameter and length.
(3) Performance: Random sampling for hardness and tensile strength testing to ensure the raw material meets the high-strength, high-toughness requirements for fasteners.MORE
In-Process Quality Inspection(1) Thread quality: Complete threads, uniform pitch, no stripped or broken threads.
(2) Plating (hot-dip / electro): Thickness and adhesion verified – no missed plating, peeling, or flaking.
(3) Process control: No unlabeled or unqualified products may move to next stage. Defective products are immediately removed during production.MORE
Final Product Inspection(1) Comprehensive Testing: After batch production is completed, 100% visual inspection of all products + 10% dimensional sampling inspection. Core items (threads, dimensions, coating) are 100% fully inspected.
(2) Appearance Quality: No burrs, oxidation, rust, or scratches; surface finish meets requirements. Hot-dip galvanized parts have uniform zinc coating with no missing spots.
(3) Dimensional Accuracy: Thread specifications (metric / imperial / US), length, diameter, head dimenMORE
Packing and Outgoing QCPackaging Inspection:
Inner: Wrapped with moisture-proof film & bubble wrap. Fasteners bagged/boxed by spec with clear labels.
Outer: Export-grade cartons/wooden crates, reinforced for sea freight. Labels: gross/net weight, specs, qty, destination, "Fragile", "Keep Dry".
Pre-shipment Verification:
Before loading: Recheck specs, qty, batch against order. Inspect packaging – no damage or mixing.
Complete export quality docs shipped with goods – ensuring smooth cuMORE

Hebei Zhongjiu Energy Technology Co., Ltd.

Specializing in new energy structural components and high-end fasteners for 25 years, integrating R&D, production, sales, and export – a one-stop solution for all your fastener needs.

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＋8617733080903
＋8617733080903
hebeizhongjiu@outlook.com
Nantong Science and Technology Park, No. 58 Chongchuan Road, Nantong City, Jiangsu Province