Screw Knowledge - Fastener Technical Guide | Zhuhai Jiali Hardware

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

Grade 10.9 & 12.9 alloy high-strength bolts easily absorb hydrogen during electroplating, leading to delayed fracture after months of storage and assembly, triggering serious safety accidents on energy storage and wind power equipment. This article explains hydrogen embrittlement formation mechanism, compares hydrogen risk level of electro-galvanized, zinc-nickel and Dacromet coatings via table, s

High-strength fasteners for new energy energy storage, wind power and heavy industry equipment require strict mechanical properties, fatigue resistance and low-temperature toughness. This article explains the differences between grade 8.8/10.9/12.9 high-strength bolts, matches suitable models for wind tower, energy storage PACK and heavy-duty frame working conditions, summarizes selection mistakes

Introduce complete pre-plating, main plating and passivation process of zinc-nickel coating for grade 10.9/12.9 battery pack bolts. Compare salt spray and hydrogen embrittlement resistance of electro-galvanized, mechanical galvanized and zinc-nickel coatings. Define coating thickness standards for inland and coastal energy storage projects, analyze coating peeling, black spot and hydrogen embrittl

Analyze hydrogen embrittlement cracking causes of grade 10.9/12.9 high-strength bolts for energy storage and power battery packs. Specify baking temperature and holding time for coated bolts according to GB/T 3098.1. Introduce full-process hydrogen control procedures and crack detection methods to eliminate delayed fracture risks after battery pack assembly.

Pre-treatment, alloy electroplating, sealing passivation and hydrogen embrittlement testing procedures are fully cited from GB/T10125 zinc-nickel alloy plating standard, targeting M4-M8 sealing screws for power battery housing. Distinguish process parameters of two coating types with 12% and 15% nickel content, summarize rectification plans for three mass production defects: coating peeling, hydro

This guide introduces matching rules, assembly methods, installation points and taboos of GB bolts, nuts, flat washers and spring washers for standard hardware selection.

This article explains the core heat treatment process for high-strength fasteners, including principles, procedures and its effect on improving mechanical properties.

This article explains the core heat treatment process for high-strength fasteners, including principles, procedures and its effect on improving mechanical properties.