Hong Kong screws, bolts and nuts fastener industry news and sourcing guides — by JIALI Industrial (164.hk), covering stainless steel, high-strength bolts and surface treatment.
Industry News2026-09-06Before ordering custom fasteners, the drawing should clearly specify: (1) material grade (carbon steel 35# / 45#, alloy steel 40Cr / SCM435, 304 / 316 stainless, brass or titanium); (2) strength class (8.8 / 10.9 / 12.9); (3) thread spec such as M8×1.25 with coarse or fine pitch and effective length; (4) head style, drive type and surface finish; and (5) quantity and lead time. A 2D drawing with critical dimensions plus a 3D model or physical sample lets the supplier quote and sample in one round instead of endless clarifications.
Read more →Industry News2026-09-06In cross-border fastener procurement, terminology mismatches cause costly misunderstandings. For example, the Chinese term '螺絲' can map to screw, bolt or threaded fastener in English, while '螺栓' (bolt) and '螺釘' (screw) are strictly distinguished in the Chinese national standard: a bolt mates with a nut, whereas a screw taps directly into the workpiece. Mastering a standard EN–ZH terminology glossary prevents specification drift in quotation and delivery — a vital skill for Hong Kong buyers interfacing with mainland factories or overseas suppliers.
Read more →Industry News2026-09-04To get a fastener quote quickly, your RFQ should include: 1) size and thread (e.g. M8×1.25, coarse or fine pitch); 2) material and strength class (4.8 / 8.8 / 10.9 / 12.9 carbon steel, 304 or 316 stainless); 3) surface finish (zinc-plated, yellow zinc, hot-dip galvanised, Dacromet, black oxide); 4) quantity and delivery date. Attach a drawing, sample or reference standard (GB/T, DIN, ISO, ASTM) to avoid repeated clarification and receive a quotation the first time.
Read more →Industry News2026-09-02Blind rivets allow single-side installation without access to the back of the workpiece, making them ideal for sheet-metal enclosures, ventilation ducts and vehicle body assembly. Open-end rivets (DIN 7337) are the simplest and most cost-effective, suited for general-strength joints. Closed-end rivets seal the mandrel head inside the body, offering better water and dust resistance for sealed applications. Structural rivets (mono-lock, multi-lock) form a larger blind-side bulb after setting, delivering higher tensile and shear strength for demanding joints or soft substrates.
Read more →Industry News2026-09-01Curtain wall brackets carry wind load, thermal expansion and long-term vibration — a loosened or corroded fastener directly endangers the building, which is why curtain wall projects set strict requirements on material, strength and corrosion resistance. High-strength bolts are commonly 8.8 / 10.9 grade (GB/T 1228, ISO 898-1); stainless parts should follow ISO 3506, choosing A2 (304) or A4 (316), with material certificates provided.
Read more →Industry News2026-09-01Salt concentration at sea is far higher than inland, and chloride ions penetrate platings to attack the base metal. Zinc-plated carbon steel often shows red rust within 72–96 hours in ASTM B117 salt-spray testing, and lasts even shorter in marine service. For marine fasteners, go straight to 316 stainless steel or the higher-grade 2205 duplex — solving corrosion at the material level and avoiding frequent replacement that affects voyage safety.
Read more →Industry News2026-09-01Smartphones, TWS earbuds, dashcams and 5G IoT modules use M1 down to M0.6 micro machine screws, mainly pan head (GB/T 818) and countersunk (GB/T 819). With such small drive surfaces, cam-out is the top failure — pair each screw with a properly torqued micro driver and match the pilot hole to the thread (coarse / fine).
Read more →Industry News2026-08-29A spring washer relies on the elasticity of its split opening to maintain continuous tension and take up play, which suits light-load, low-vibration joints. A flat washer mainly spreads clamping load and protects the workpiece surface — it does not provide locking by itself. Lock nuts (nylon insert, flange face) lock through friction or controlled deformation and offer the best vibration resistance. Use a spring washer for light, low-vibration connections; for critical or highly vibrating joints, prefer lock nuts.
Read more →Industry News2026-08-26Expansion bolts grip the substrate by mechanically expanding against the hole wall, generating friction. Chemical anchors bond the bolt to the concrete via resin adhesive that fills the annular gap and cures into an integral mass. Expansion bolts install quickly and are removable, but exert expansion stress on the substrate; chemical anchors generate no expansion stress, distribute load more evenly, and suit cracked concrete or small edge-distance conditions.
Read more →Industry News2026-08-24Hex head bolts protrude and need side access for wrenches, ideal for open spaces. Hex socket bolts have a cylindrical head with an internal hex recess, allowing flush or countersunk installation where space is tight or a smooth surface is needed. Equipment interiors, rail vehicles and precision machinery often prefer socket heads.
Read more →Industry News2026-08-24304 contains about 18% chromium and 8% nickel, fine for general humid use; 316 adds 2–3% molybdenum, greatly improving resistance to chlorides. In ASTM B117 salt-spray testing, 316 often lasts 2–4 times longer than 304 before rust appears — coastal outdoor, pool and marine jobs should choose 316.
Read more →Industry News2026-08-22Rust usually starts with humidity or salt spray combined with damaged plating. Zinc-plated carbon steel often shows red rust within 72–96 hours of salt-spray testing (e.g. ASTM B117) in coastal outdoor use. Switch to stainless 304 / 316 or Dacromet coating to fix it at the material and finish level.
Read more →Industry News2026-08-21The reliability of a bolted joint depends on preload, which is controlled by tightening torque. Too low causes loosening; too high risks stripping or fracture. High-strength bolts (8.8 / 10.9 / 12.9) must be tightened to specification.
Read more →Company News2026-08-12Hong Kong's humid coastal climate and salt spray rust ordinary plated parts outdoors and at sea. To make selection easy, we grouped 304 / 316 / 2205 duplex fasteners together.
Read more →Industry News2026-08-05Storage, EV charging, PV racks and inverters keep expanding, boosting demand for high-strength, anti-loosening and corrosion-resistant fasteners.
Read more →Company News2026-07-22JIALI presented custom fasteners to drawing, multi-standard supply (GB / DIN / ANSI / ISO) and one-stop sourcing at the Hong Kong International Hardware Show.
Read more →Industry News2026-07-10304 suits general outdoor and humid use at best value; 316 has molybdenum for better chloride resistance, ideal coastal/marine; 2205 duplex balances strength and corrosion.
Read more →Company News2026-06-28We optimized Hong Kong stock and order follow-up. Regular screws, bolts, nuts and washers can ship same / next day.
Read more →Industry News2026-06-15Façade joints face wind load, thermal movement and vibration; loosening or rusting affects safety and service life.
Read more →Company News2026-05-30The site now offers instant product search (try stainless, M8, DIN912) and one-click CSV catalog download covering all products.
Read more →Industry News2026-08-20Bolt grade is shown by dot-separated numbers such as 8.8, 10.9, 12.9. Higher means greater tensile and yield strength.
Read more →Industry News2026-08-01Pan, countersunk, round, socket, hex and flange heads — each affects tool access, seating and appearance.
Read more →Company News2026-07-05For prototypes, repairs and trial production, we offer small-batch custom fasteners and sample replication without high MOQ.
Read more →Company News2026-08-16Common sizes of 12.9 gr alloy steel socket head (DIN912) and hex bolts added to stock, ready for heavy-load and high-stress joints.
Read more →Industry News2026-08-14Has drilling/self-cutting threads; drives directly into sheet metal, wood, drywall without pre-tapping.
Read more →Industry News2026-08-10Carbon steel rusts in humid and salt-spray environments; weak coating or scratches are common causes.
Read more →Company News2026-07-30Free selection consulting: share environment, load and installation method, get material, grade and finish recommendations.
Read more →Industry News2026-07-18Low cost, basic rust proofing — best value for indoor and general outdoor.
Read more →Company News2026-07-08Regular stock can be delivered or shipped in Hong Kong; method, cost and timing confirmed at order.
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