Hardware And Fasteners/Screws

Products & Range Coverage
A&S MACHINERY CO., LTD. delivers an extensive inventory of specialized screws within our hardware and fasteners catalog to support diverse heavy-duty equipment:
• Machine & Screws Application Compatibility: Engineered for a broad range of Komatsu heavy-duty excavators, loaders, and bulldozers, our parts ensure exact thread geometries, alloy grades, and head configurations for a 100% perfect match, lossless alignment, and factory-grade joint performance.
• Complete Heavy-Duty Screw Range: 1. Grade 12.9 Socket Head Cap Screws: Engineered specifically to withstand extreme shear stresses and high-frequency alternating impacts across swing circles, hydraulic pump connections, and high-pressure engine zones; 2. Flange Screws for Engine & Transmission: Featuring anti-loosening knurling or large bearing surfaces to effectively disperse stresses and prevent self-loosening under severe vibrations; 3. Undercarriage & Structural Hex Screws: Possessing high surface hardness and core toughness to withstand heavy earthmoving friction and tensile demands.
• OEM & Heavy-Duty Aftermarket: We offer certified original equipment manufacturer Komatsu screws alongside rigorous bench-tested aftermarket parts, delivering exceptional operational reliability and extended service lifespan at a cost-effective procurement point for global clients.

Supply Chain & Logistics
We maintain a robust operational infrastructure designed to support global screw procurement through direct supply channels, delivering reliable stock availability and rapid dispatch to build trust with international equipment owners and repair facilities.
• Massive Inventory and Cross-Reference: We maintain large-volume stock of hundreds of differing specifications of high-strength screws for Komatsu mainstream heavy-duty machines across every assembly zone. Backed by barcode-enabled intelligent warehousing and Komatsu cross-reference databases, we guarantee precise matching and immediate dispatch upon order confirmation to fulfill routine maintenance and rapid replacement needs for overseas fleet workshops and minimize equipment downtime caused by a broken high-strength screw.
• Anti-Rust Sealing and Crated Bulk Packaging: We implement specialized industrial packaging standards for high-strength screw products featuring compact unit dimensions, high metal density, internal precision threads, and high vulnerability to thread impact damage, stripping, or marine salt spray corrosion during transcontinental transport, utilizing environmentally friendly long-lasting Dacromet or heavy anti-rust oil surface sealing combined with high-strength thickened plastic bags vacuum-sealed into categorized grid compartments, and backing these with high-strength independent corrugated boxes or heavy-duty export fumigated wooden crates to completely isolate marine salt spray and prevent thread damage or component scattering.
• Consolidated Sourcing for Fastener Kits: We support overseas clients by consolidating high-strength screws alongside matching large components, such as track shoes, overhaul kits, and hydraulic pumps, into precise bundled full-set fastener maintenance kits, achieving a one-stop purchasing model that maximizes container space utilization and significantly reduces comprehensive logistics costs for overseas workshops.

Engineering Solutions & Technical Support
Our technical framework focuses on resolving field-level operational challenges to eliminate equipment downtime, moving beyond simple parts distribution to deliver comprehensive engineering and service capabilities for fastening asset security.
• Application-Specific Durability Solutions: We address common field issues in extreme jobsite environments, such as heavy open-pit quarries and continuous high-load dozing operations where standard factory screws experience fatigue fracture under prolonged high-frequency pulse vibrations, leading to critical bracket loosening. We also provide professional engineering upgrades, including 40Cr and 35CrMo alloy steel forgings heat-treated to Grade 12.9 ultra-high tensile strength with roll-threaded root strengthening.
• Troubleshooting and Maintenance Guidelines: We address common user concerns regarding Komatsu swing circle abnormal noises, engine component screw loosening, or socket head rounding during disassembly by providing professional diagnostic and maintenance guidance. This includes emphasizing strict adherence to torque and lubrication protocols requiring technicians to cross-tighten high-strength screws symmetrically to manufacturer specified torques using torque or hydraulic wrenches, applying special anti-seize compounds to threads, strictly prohibiting uncontrolled blind tightening with pneumatic tools, while also mandating the complete non-reuse of fatigued high-strength screws on critical structural shear zones, such as swing circles and flywheel housings to prevent premature joint failure.
• Expert Technical Support and Safety Guidelines: We provide technical documentation covering precise torque value comparison tables, tightening sequences, and hex tool selection guides for Komatsu key assemblies, including swing circles, engines, and undercarriages, assisting overseas technical personnel in achieving standardized installations.

Call to Action & User Experience
Optimize your machinery structural assembly reliability and maintenance efficiency today by utilizing our interactive tools placed across strategic positions on our platform.
• Multi-Dimensional Intelligent Search and Specification Filtering: Benefit from advanced search functions supporting fast product filtering by Komatsu machine model (such as PC200-8, PC360-7, WA380, or D85), application areas (such as slewing ring screws, engine screws, or undercarriage screws), strength grades (such as 10.9 or 12.9), or original equipment manufacturer part numbers to lock onto target products instantly.
• RFQ and Screw and Fastener Kit Quotation: Access our fast-response interactive channels providing one-click bill of materials uploads for fleet Komatsu machinery overhaul fastener procurement lists, including screw and nut combinations, to receive bundled assembly quotations and international logistics freight estimates, fulfilling workshop emergency repairs and large-scale periodic spare parts reserve procurement requirements.
• Consultation and Support: Utilize our around-the-clock professional technical support channels staffed by senior Komatsu machinery fastener and materials science experts to assist overseas clients in verifying compatibility for legacy non-standard screw thread pitches, strength equivalents, and modification inquiries, ensuring cross-border procurement runs error-free.