Hebei Wotu Fastener Manufacturing Co., Ltd., founded in the 1990s, is located in Yongnian District, Handan City, Hebei Province, known as the “Hometown of Fasteners.”
1. Core Hardness: Standard: HRC32-40. Our products are measured at HRC31.7-39.0.
2. Surface Hardness: Standard: HV600-700. Our products are measured at approximately HV620.
3. Hardened Layer: 4#-6#: 0.05-0.18mm; 8#-12#: 0.10-0.23mm; 14#: 0.15-0.28mm.
4. Torque: Specifications, self-drilling screw, bolt.
Hebei Wotu Fastener Manufacturing Co., Ltd., founded in the 1990s, is located in Yongnian District, Handan City, Hebei Province, known as the “Hometown of Fasteners.” Our company specializes in producing self-drilling screws, hexagonal self-drilling screws, tower bolts, anti-theft bolts, GB30 bolts, anti-theft nuts, foot bolts, U-bolts, electrified railway bolts, nuts, bolt pins, and various electrical fittings. We stock various hot-dip galvanized bolts, nuts, flat washers, and spring washers, and can customize various non-standard parts. We can also help customers arrange sourcing and shipping. Our factory can undertake various external processing and heat treatment work, including hot-dip galvanizing and electro-galvanizing, as well as surface treatment work such as phosphating, drawing, annealing, and tempering. We are serious about self-drilling screws, hot-dip galvanized bolts, and our products. If you have any needs, please feel free to contact us!
For an M10–M24 U-bolt RFQ, buyers should send a dimensioned drawing that defines thread diameter, inside width, leg or overall length, bend geometry, thread length, application diameter, material or grade requirement, surface finish, matching nuts/washers, quantity, and packing needs. Nominal thread size alone is not enough because different measurement datums can produce U-bolts that look […]
When ordering L-shaped anchor bolts against an older standard, buyers should verify the standard’s current status, confirm the specification approved for the project, and reconcile the drawing, dimensions, material and foundation interface before releasing the purchase order. A legacy standard number on a product page or old drawing is not, by itself, sufficient evidence that […]
