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GB/T 5781-2025 Grade 4.8 Carbon Steel Hex Head Bolts Full Thread Hot Dip Galvanized Construction Fasteners
GB/T 5781-2025 Grade 4.8 Carbon Steel Hex Head Bolts Full Thread Hot Dip Galvanized Construction Fasteners
GB/T 5781-2025 Grade 4.8 Carbon Steel Hex Head Bolts Full Thread Hot Dip Galvanized Construction Fasteners
GB/T 5781-2025 Grade 4.8 Carbon Steel Hex Head Bolts Full Thread Hot Dip Galvanized Construction Fasteners
Specifications
Tensile Strength :
400 MPa (min)
Supply Ability :
50 Tons per Month
Price :
USD 0.02-1.00 / Piece
Material :
Carbon Steel
Property Class :
4.8
Size Range :
M6 - M24
Yield Strength :
320 MPa (min)
Brand Name :
FLRS or OEM
Surface Finish :
Plain, Zinc Plated, Hot Dip Galvanized
Model Number :
FLRS-GB5781
Delivery Time :
7-15 days for stock sizes, 15-25 days for production
Head Style :
Hexagon Head
Payment Terms :
T/T,L/C
Thread :
Full Thread, Metric Coarse
Place of Origin :
China
Certification :
ISO 9001
Standard :
GB/T 5781‑2025 (Hexagon Head Bolts, Product Grade C)
Packaging Details :
Plastic bags + cartons + plywood pallets (strapped and film-wrapped)
MOQ :
1,000 Pieces
Application :
Construction, Steel Structures, General Machinery
Description

GB/T 5781-2025 Hexagon Head Bolts Grade 4.8 Carbon Steel (Product Grade C)

Product Description

Attribute Specification
Product Name GB/T 5781-2025 Hexagon Head Bolt, Product Grade C
Standard GB/T 5781-2025 (Equivalent to ISO 4018:2022 / DIN 558)
Material Carbon Steel
Property Class 4.8
Thread Full Thread, Metric Coarse
Size Range M6 - M24 (Custom Sizes on Request)
Head Style Hexagon Head
Surface Finish Plain, Zinc Plated, Hot Dip Galvanized
Certification ISO 9001
Application Construction, Steel Structures, General Machinery
Available Packing Plastic bags + cartons + plywood pallets (strapped and film-wrapped)

Key Features

1. Grade 4.8 property class - minimum tensile strength 400 MPa and yield strength 320 MPa, a dependable choice for general-purpose fixing.
2. Full thread - the thread runs the whole length of the shank, so the bolt can be cut to size on site without losing grip.
3. Standard dimensions - manufactured to GB/T 5781-2025, interchangeable with ISO 4018:2022 and DIN 558 bolts of the same size.
4. Finish options - plain, zinc plated or hot dip galvanized, so you can pick the right corrosion protection for the job.
5. Economy grade C - made for non-critical connections, helps keep project cost under control.

Typical Applications

- Steel structure assembly and building frames.
- General machinery and equipment fixing.
- Scaffolding and temporary structures.
- Fencing, racks and storage systems.

Our Services

1. Quick response to inquiries, usually within 24 hours.
2. Full specification and size lists available on request.
3. Samples can be arranged before mass production.
4. On-time delivery with complete export documentation.
5. Customized packing, with photos sent before shipment.
6. Fair pricing with consistent quality.

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GB/T 5781-2025 Grade 4.8 Carbon Steel Hex Head Bolts Full Thread Hot Dip Galvanized Construction Fasteners

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Product Detail
Tensile Strength :
400 MPa (min)
Supply Ability :
50 Tons per Month
Price :
USD 0.02-1.00 / Piece
Material :
Carbon Steel
Property Class :
4.8
Size Range :
M6 - M24
Contact Supplier
GB/T 5781-2025 Grade 4.8 Carbon Steel Hex Head Bolts Full Thread Hot Dip Galvanized Construction Fasteners
GB/T 5781-2025 Grade 4.8 Carbon Steel Hex Head Bolts Full Thread Hot Dip Galvanized Construction Fasteners

Shaanxi Flourish Industrial Co., Ltd.

Verified Supplier
8 Years
Since 2019
Business Type :
Manufacturer, Exporter, Seller
Main Products :
Mechanical Fasteners, Hex Head Bolt, Stud Bolt
Total Annual :
2000000-5000000
Employee Number :
50~100
Certification Level :
Verified Supplier
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