01Jiaxing, Zhejiang · HUMAN-REVIEWED PUBLIC SOURCESTong Ming Enterprise Co., Ltd.
Founded in Jiaxing in 1995 as the mainland manufacturing operation of TONG Group, Tong Ming produces THE/TONG branded stainless-steel fasteners and precision wire. Its public product range includes bolts, machine screws, socket screws, self-tapping screws, rivet nuts, threaded rods, washers and retaining rings for industrial and construction applications.
stainless steel boltsstainless steel nutsmachine and socket screwsself-tapping and drilling screws
1 evidence items · Updated 01 Sep 2026 02Jiashan, Zhejiang · HUMAN-REVIEWED PUBLIC SOURCESGem-Year Industrial Co., Ltd.
Shanghai-listed manufacturer in Jiashan producing standard and special fasteners, precision wire, railway fastening systems, carbide dies and related industrial products.
boltsnutsscrewsprecision wire
1 evidence items · Updated 01 Sep 2026 03China · exact location under review · DISCOVERY CANDIDATE · REVIEW PENDINGShanghai Dite Precision Fasteners Co., Ltd.
Manufacturer of precision-engineered fasteners including self-locking nuts, prevailing torque nuts, and aerospace-grade bolts. Complies with NAS, MS, and GJB standards. Supplies to aviation, rail, and wind power sectors with certified heat treatment and testing capabilities.
prevailing torque nutsself-locking nutsaerospace boltshigh-tensile studs
1 evidence items · Updated 01 Sep 2026 04China · exact location under review · DISCOVERY CANDIDATE · REVIEW PENDINGZhejiang High Strength Fasteners Co., Ltd.
Specializes in high-strength fasteners for construction and energy sectors, including ASTM A325/A490 structural bolts, anchor rods, and wedge anchors. Certified to ISO 9001 and ISO 14001; conducts mechanical testing per ASTM F606 and tensile verification.
ASTM A325 boltsanchor rodswedge anchorsheavy-duty nuts
1 evidence items · Updated 01 Sep 2026 05China · exact location under review · DISCOVERY CANDIDATE · REVIEW PENDINGGuangdong Songke Fastener New Materials Co., Ltd.
Focuses on stainless steel and corrosion-resistant fasteners including marine-grade screws, duplex bolts, and non-magnetic fasteners. Offers custom alloy formulations (e.g., SUS316L, UNS S32205) and surface finishes such as passivation and electropolishing for medical and offshore applications.
marine screwsduplex boltsnon-magnetic fastenersSUS316L nuts
1 evidence items · Updated 01 Sep 2026 06China · exact location under review · DISCOVERY CANDIDATE · REVIEW PENDINGHebei Helipu Fasteners Manufacturing Co., Ltd.
Produces carbon steel and alloy steel fasteners including hex cap screws, carriage bolts, and U-bolts for automotive, agricultural, and infrastructure use. Maintains in-house thread rolling, heat treatment, and zinc-nickel plating lines compliant with ISO 4042 and ASTM B633.
hex cap screwscarriage boltsU-boltsgrade 8.8 bolts
1 evidence items · Updated 01 Sep 2026 07China · exact location under review · DISCOVERY CANDIDATE · REVIEW PENDINGChangshu Standard Fasteners Factory Co., Ltd.
State-owned heritage enterprise producing standard GB fasteners since 1958, including hex bolts, square nuts, and machine screws. Maintains full traceability for raw material batches and dimensional compliance per GB/T 3098.1–2019 and GB/T 5782–2016.
GB hex boltssquare nutsmachine screwsset screws
1 evidence items · Updated 01 Sep 2026