Designers often struggle to choose between nylon plastic fasteners and metal screws. Huge gaps in mechanical, electrical and environmental performance will lead to short circuit, rust, fracture and signal interference if mismatched. Based on mass supporting cases, CHILOK makes systematic performance comparison, defines applicable scenarios clearly and provides standardized reference for structural selection.
Nylon fasteners are integral insulators with high breakdown voltage, completely cutting conductive loops to avoid electric leakage and short circuits, ideal for high-voltage control boxes and battery modules. Carbon steel and stainless steel are conductors which connect metal parts of different potentials, only allowed for equipment grounding with isolating gaskets.
Nylon features low tensile strength only for light auxiliary fixing; high torque easily causes shank cracking and thread stripping. Glass-filled nylon gains limited strength and cannot replace high-strength bolts. Alloy steel grade 8.8/10.9/12.9 and SUS316 stainless steel own far higher tensile force for heavy-load connections of vehicles and machinery.
General PA66 nylon long-term service ≤80℃, glass-filled version max 110℃; continuous high temperature leads to softening and loss of clamping force. Metal bolts remain stable above 200℃, suitable for heating equipment and furnaces.
Nylon resists weak acid, alkali and brine without oxidation rust, ideal for water treatment and chemical equipment. Ordinary carbon steel rusts easily; SUS304/316 deliver great salt spray resistance but cause galvanic corrosion when contacting dissimilar metals, requiring nylon isolating washers.
Nylon is fully non-magnetic without disturbing RF sensors and MRI equipment. Carbon steel is magnetic, regular stainless steel weak magnetic, leading to data drift and communication faults on precision instruments.
Nylon polymer absorbs vibration stress to eliminate noise and prevent plastic substrate cracking. Rigid metal transfers vibration and causes thread loosening over long cycles, requiring thread locker and spring washers additionally.
Nylon weighs only 1/6 of steel with soft surface that will not scratch acrylic, paint and plastic housings. Hard metal easily crushes thin plastic and decorative panels, and adds extra weight to lightweight equipment.
1. High/low voltage cabinets, EV chargers, energy storage modules: insulation protection against short circuit; 2. Coastal water treatment & small chemical equipment: acid & alkali resistance without frequent replacement; 3. RF instruments, MRI & optical testers: non-magnetic to avoid signal deviation; 4. Acrylic displays, plastic chassis & lightweight home appliances: scratch-proof and shock absorption; 5. PV insulating clamps & low-voltage outdoor brackets: UV-modified nylon cuts metal conduction loops.
1. Auto chassis, construction machinery, wind power steel frames: high strength for impact & vibration resistance; 2. Heating machines & industrial furnaces: stable performance under persistent high temperature; 3. Large steel structures & rooftop PV main supports: long-term outdoor anti-corrosion stainless & Dacromet bolts; 4. Equipment grounding & lightning protection: metal conduction for safety earthing; 5. Heavy automation frames & conveyors: withstand large tension and shear force impossible for nylon.
1. Galvanic corrosion: Direct contact between stainless steel and carbon steel accelerates rusting, nylon gaskets are mandatory; 2. Torque mismatch: Metal nuts paired with nylon shanks crack easily, matched nylon nuts & washers required; 3. Thermal deformation gap: Different thermal expansion coefficients cause loosening after temperature cycles, avoid mixing on single stressed surface; 4. Insulation failure: Metal screws penetrating PCB cause short circuits, totally forbidden inside insulated areas.
1. PV aluminum brackets: SUS316 bolts for main load, UV-resistant nylon hex screws for insulating clamps; 2. Electrical cabinets: Carbon steel bolts for metal frames, nylon standoffs & screws for PCB layered insulation; 3. Coastal outdoor equipment: SUS316 connectors with nylon flat washers to block galvanic corrosion; 4. Medical housings: Metal base for load bearing, micro nylon screws for internal circuit boards, non-magnetic without metal precipitation.
CHILOK manufactures full series of insulated nylon fasteners, stainless steel standard parts and grade 8.8~12.9 high-strength bolts, supplied separately or in matched sets as project demands. Nylon range includes hex head, pan head, standoffs and clips; metal series covers socket cap, flange, security torx and expansion bolts. Material, salt spray and insulation test reports are provided per batch. Custom modified nylon and special coated metal fasteners are available for prototype trial and mass production.