Screw Knowledge - Fastener Technical Guide | Zhuhai Jiali Hardware

Technical guide to rust-proof storage and warehouse care for fasteners—environment, packaging protection, stock rotation and rust handling.

Guide comparing common fastener finishes—zinc, nickel, dacromet, phosphating and e-coat—with salt-spray classes and selection advice.

Explain neutral salt spray (NSS) equipment, solution, duration and judgement to help buyers and engineers accept plating.

Standard process from drawing confirmation, sampling, sample approval to mass production, helping customers shorten development cycles.

Compare zinc plating, hot-dip galvanizing, dacromet, electrophoretic black and nickel plating on corrosion, appearance and cost.

A comparison of stainless steel, carbon steel and alloy steel fasteners covering performance differences, application scenarios and selection points for engineers.

Technical guide for grade 10.9 and 12.9 high-strength bolt tightening torque, preload calibration, installation standards and failure risk control for mechanical assembly.

Detailed differences between 304, 316 and 2205 stainless steel screws, definition of A2-70, A4-80 strength grades, material selection rules and anti-rust skills for different working environments.

Compare corrosion resistance, tensile strength and applicable scenarios of 304, 316 and 2205 duplex stainless steel fasteners, providing professional selection suggestions for PV, marine, chemical and outdoor projects.

Manufacturing factories face complex fastener categories, scattered purchasing, overstocked inventory and uneven quality. This article analyzes fastener supply chain pain points of machinery, sheet metal and automation factories, explains one-stop centralized procurement cost-saving logic, and provides implementable supply chain optimization solutions from inventory, lead time, quality control and

Equipment manufacturing and sheet metal enterprises often face batch color difference, dimension deviation, unqualified hardness, defective coating and mixed parts when purchasing full-category fasteners in bulk. This article establishes a complete incoming acceptance system, clarifies five major inspection standards including appearance, dimension, mechanical performance, surface treatment and pa

Complete equipment fasteners cover carbon steel, stainless steel and alloy materials with various surface treatments including electro-galvanizing, hot-dip galvanizing, Dacromet, stainless steel passivation and steel blackening. This article compares salt spray resistance, wear resistance, appearance and cost of all processes to help purchasers select according to working conditions, solving faste

Equipment manufacturers require dozens of fastener types including bolts, nuts, rivets, plastic fasteners and lock washers. Sourcing from multiple separate suppliers easily causes chaotic lead time, mixed specifications and inconsistent quality standards. This article explains advantages of one-stop bundled fastener procurement, compares cost, after-sales service and quality control between distri

Insufficient tightening torque leads to inadequate preload and loosening under long-term vibration; excessive torque causes thread yield and bolt fracture. This article provides standard torque table of M6~M30 grade8.8/10.9/12.9 bolts for dry unlubricated and lubricated conditions, sorts on-site assembly workflow for wind power & energy storage steel structures, introduces torque wrench calibratio

Four mainstream anti-corrosion crafts for industrial high-strength bolts include electro-galvanizing, zinc-nickel alloy, Dacromet and mechanical galvanizing. Hard restrictions exist on coating matching for different strength grades, standard electroplating is forbidden for grade 10.9 & 12.9 bolts. This article compares salt spray, hydrogen embrittlement risk, temperature resistance and cost parame