Hotop Metal Products is a Handan, Hebei-based manufacturer and exporter of hot dip galvanized (HDG) carbon steel fasteners — hex bolts, flange nuts, flat washers, anchor bolts, threaded rods and stud bolts — sold in bulk to construction, steelwork and industrial buyers in more than 50 countries.
Hotop Metal Products (fastenersb2b.com) is a Chinese fastener factory specialising in hot dip galvanized bolts, nuts, anchors, washers and threaded rods. Buyers send specifications — DIN/ANSI/ISO standard part numbers, metric sizes, property grades, coating type or custom technical drawings — and receive a quotation, manufacturing timeline and bulk shipment; the site states bulk pricing and a production timeline are returned within 24 hours. Production runs on cold-forging, CNC machining and hot dip galvanizing lines in Handan, Hebei, China, and the company reports ISO 9001:2015 certification, 25+ years of fastener and galvanizing experience, and exports since 1998.
- In-house hot dip galvanizing — HDG per ISO 1461 with a 45-85 micron zinc coating, aimed at marine, industrial and outdoor service environments.
- Wide standards coverage — DIN, ANSI, ISO, ASME, GB and JIS, including DIN 933, DIN 931, DIN 975, DIN 6923, DIN 125 and 7-shape/L-type foundation bolts.
- Property grades 4.8 to 12.9 — grade 8.8 is the headline option for hex bolts; grade 12.9 appears on DIN 6923 flange nuts and extended hex bolts.
- Documented size ranges — threaded rod M5-M10 (grades 4.8/6.8/8.8), hex bolts M12-M20, custom double-ended stud bolts M6-M24 in carbon steel or stainless steel.
- 100% inspection rate — an on-site metrology lab tests dimensions, tensile strength and hardness, with full material test certificates per EN 10204 3.1.
- Multiple material and finish options — carbon steel, stainless steel, zinc plated and black zinc plated variants.
- Export logistics — digital inventory tracking with a stated 99% order accuracy and dispatch to 50+ countries.
- Custom manufacturing — the engineering team builds to supplied drawings, covering non-standard stud bolts and bent anchor geometries.
- Steel fabricators and structural contractors: source DIN 933 grade 8.8 hot dip galvanized hex bolts in M12-M20 for steel structure assembly and outdoor fastening.
- Construction and civil works buyers: order L-type and 7-shape anchor bolts or wedge expansion anchors for concrete embedding, foundation fixing and equipment base anchoring.
- Industrial distributors and importers: buy bulk flange nuts, DIN 125 flat washers and threaded rod across grades 4.8-12.9 for resale.
- Overseas procurement teams: commission custom M6-M24 stud bolts or non-standard parts against their own technical drawings and request material test certificates.
- Marine and coastal steelwork: specify fasteners with a 45-85 micron galvanized coating where salt exposure makes corrosion resistance the deciding factor; the site also publishes guidance comparing HDG fasteners with stainless steel for coastal projects.
- Concrete anchoring: use wedge expansion anchors installed through a fixture into a pre-drilled hole, then tightened so the wedge clip expands and locks against the concrete.
- Machinery and equipment mounting: order DIN 931 / DIN 933 extended hex bolts in grade 10.9 or 12.9 for equipment installation and heavy-duty fastening.
- Threaded rod assemblies: buy DIN 975 full-thread stud bar in grades 4.8/6.8/8.8 for construction, machinery and industrial fastening work.
How does ordering work?
- Send your specification — standard, metric size, grade, material, coating, or a technical drawing.
- The engineering team reviews quality validation and material specification for the project.
- Bulk pricing and a detailed manufacturing timeline are returned within 24 hours.
- Production runs through cold forging/CNC machining, hot dip galvanizing and 100% inspection with EN 10204 3.1 certificates.
- Orders are dispatched from the Handan facility with digital inventory tracking.
Pricing
Hotop sells on a bulk B2B quotation basis rather than published list prices: the site directs buyers to submit quantity and technical requirements through the inquiry form, phone (+86 15632029222), WhatsApp (+1 802 3409134) or email, and states that bulk pricing and a manufacturing timeline follow within 24 hours.
FAQ
The factory states ISO 9001:2015 certification and performs hot dip galvanizing to ISO 1461 with a 45-85 micron zinc coating. It also issues full material test certificates per EN 10204 3.1, and an on-site metrology lab tests dimensions, tensile strength and hardness.
Can Hotop manufacture fasteners to custom drawings?
Yes. The catalogue includes custom-size M6-M24 double-ended stud bolts in steel or stainless steel, and the company states its engineering team provides quality validation and material specification consulting based on customer requirements and technical drawings for non-standard specifications.
What grades and sizes are available?
Grades span 4.8, 6.8, 8.8, 10.9 and 12.9 depending on the part. Listed sizes include DIN 975 threaded rod in M5-M10, DIN 933 hex bolts in M12, M14, M16, M18 and M20, and custom double-ended stud bolts from M6 to M24.
The company is based in Handan, Hebei, China, and can be reached by phone or WhatsApp at +86 15632029222, by WhatsApp Business at +1 (802) 3409134, or by email at [email protected]. The website also carries an inquiry form covering product category, quantity and requirements.
