High Strength Bolts &Industrial Fasteners
Professional fastening solutions for construction, structural steel, infrastructure, machinery and industrial projects. Product requirements can be specified by standard, grade, dimensions, material, finish and project application.
High Strength Bolts, Anchors, Studs and Industrial Fasteners
Ten fastener categories below. Each card lists the size range, grade, standard and finish we normally stock or produce. Send the spec you need and we quote against it.
High Strength Hex Bolts & Nuts — ASTM A325 / A490, M12–M64
Structural bolting for steel frames, bridges and heavy equipment. Stocked in ASTM A325 / A490, DIN 931 / 933 and GB/T 1228 series.
M12–M64 · Grade 8.8 / 10.9 / 12.9 · ASTM A325 / A490 · HDG / Zinc Plated
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Product Scope
Hexagon head bolts, heavy hex bolts, structural bolts, full-thread bolts, partial-thread bolts, flange bolts and matching nuts.
Standards & Grades
- ASTM A325 / A490 structural fastening requirements
- DIN 931 / 933 / ISO 4014 / 4017 metric specifications
- GB/T 1228 / 1229 / 1230 Chinese standards
- Property classes 8.8, 10.9 and 12.9
Applications
Steel structures, bridges, industrial plants, construction, machinery, infrastructure and heavy equipment.
Related specs: ASTM A193 B7 stud bolts M8–M100 · DIN 125 flat washers M3–M64 · heavy hex structural bolts M12–M64
REQUEST BOLT QUOTATION
ASTM A193 B7 Stud Bolts & Double-End Studs — M8–M100
For flange joints, pressure equipment and piping systems. B7, B7M, B16 and 8.8 / 10.9 grades with metric or imperial threads.
M8–M100 · ASTM A193 B7 / B7M / B16 · Metric / UNC / UNF
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Product Scope
Fully threaded studs, double-end studs and project-specific threaded fastening components.
Specification Options
- Metric threads
- UNC / UNF threads
- Specified lengths
- ASTM A193 B7 / B7M / B16 material options
- Specified surface finishes
Applications
Pipe flanges, industrial machinery, pressure equipment and engineering maintenance.
Related specs: ASTM A325 structural bolts M12–M64 · DIN 975 threaded rods M6–M64 · DIN 127 spring washers M3–M64
SEND STUD BOLT SPECS
Chemical Anchor Bolts for Concrete — M8–M36, SS304 / SS316
Chemical anchoring for concrete fixing, equipment bases and structural retrofit. Supplied with threaded rods, nuts, washers and setting accessories.
M8–M36 · Embedment 80–400 mm · Carbon Steel / SS304 / SS316
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System Components
- Threaded anchor rods
- Chemical anchoring systems
- Nuts and washers
- Installation accessories
Selection Factors
Product selection may depend on base material, anchor diameter, embedment depth, fixture thickness, loading requirements and installation conditions.
Applications
Concrete structures, equipment bases, steel brackets, infrastructure and construction systems.
Related specs: M6–M24 expansion anchors · L / J / U foundation bolts M12–M72 · DIN 975 threaded rods M6–M64
REQUEST ANCHOR QUOTATION
Expansion Bolts & Sleeve Anchors — M6–M24
Mechanical anchoring for concrete, masonry and equipment fixing. Includes wedge anchors, sleeve anchors and heavy-duty through bolts.
M6–M24 · Length 40–300 mm · Zinc Plated / HDG / Stainless
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Common Types
- Expansion anchor bolts
- Sleeve anchors
- Heavy-duty mechanical anchors
- Through bolts
Selection Factors
Anchor diameter, embedment depth, substrate type, fixture thickness and project loading conditions should be considered.
Applications
Equipment installation, steel brackets, cable trays, pipe supports, handrails and construction fixing.
Related specs: chemical anchor bolts M8–M36 · foundation anchor bolts M12–M72 · anchor setting tools
REQUEST ANCHOR QUOTATION
Flat Washers & Spring Washers — DIN 125 / 127, M3–M64
Load distribution and surface protection for bolted joints. Available in DIN 125, DIN 127, DIN 9021 and GB/T 97 series.
M3–M64 · DIN 125 / DIN 127 / DIN 9021 · Zinc / HDG / Black Oxide
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Product Types
- Plain flat washers
- Large OD washers
- Heavy washers
- Spring washers
- Custom washer dimensions
Materials
Carbon steel, stainless steel and other specified materials according to application requirements.
Finishes
Zinc plated, black oxide and other specified surface treatments.
Related specs: ASTM A325 hex bolts M12–M64 · ASTM A193 B7 studs M8–M100 · heavy hex bolts M12–M64
REQUEST WASHER QUOTATION
L / J / U Foundation Bolts — M12–M72, HDG
Embedded anchoring for steel columns, machinery bases and equipment foundations. Manufactured to project drawings in L, J and U configurations.
M12–M72 · Length 300–3000 mm · L / J / U Shapes · Custom Bent
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Common Configurations
- L-shaped anchor bolts
- J-shaped anchor bolts
- U-shaped foundation bolts
- Straight anchor rods
- Custom bent anchor bolts
Project Requirements
Diameter, total length, projection, thread length and bending configuration can be specified according to engineering drawings.
Applications
Steel buildings, industrial plants, machinery foundations, energy projects and infrastructure.
Related specs: chemical anchor bolts M8–M36 · expansion anchors M6–M24 · structural bolts M12–M64
SEND DRAWING / REQUEST QUOTE
DIN 975 / 976 Threaded Rods — M6–M64
For pipe hangers, HVAC supports, cable trays and suspended systems. Available in DIN 975 / 976 and ASTM A193 B7 specifications.
M6–M64 · Length 1000–3000 mm · DIN 975 / 976 · B7 Available
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Specification Options
- Metric thread sizes
- UNC / UNF threads
- Specified rod lengths
- Carbon steel
- Stainless steel options
- Specified coatings
Applications
Pipe hanger systems, HVAC, electrical supports, suspended ceilings, equipment mounting and construction.
Related specs: ASTM A193 B7 stud bolts M8–M100 · DIN 125 washers M3–M64 · chemical anchors M8–M36
REQUEST THREADED ROD QUOTE
Self-Drilling Roofing Screws — #8–1/4″, EPDM Washer
For metal roofing, cladding and steel framing. Hex washer head and pan head options with EPDM washers for weather sealing.
#8–1/4″ · Length 13–150 mm · Hex Washer Head · EPDM Washer
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Product Types
- Hex washer head screws
- Pan head screws
- Roofing screws
- Metal-to-metal screws
- Construction screws
Applications
Metal roofing, steel framing, cladding, sheet metal, construction panels and industrial assembly.
Related specs: ASTM A325 structural bolts · DIN 125 flat washers · installation tools and sockets
REQUEST SCREW QUOTATION
Heavy Hex & Flange Structural Bolts — M12–M64
Heavy-duty bolting for steel structures, infrastructure and industrial plants. Project-based supply with material traceability and inspection reports.
M12–M64 · Heavy Hex / Flange Bolts · HDG / Dacromet · Traceable
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Product Range
- Structural bolts and nuts
- High strength fasteners
- Heavy hex bolts
- Flange bolts
- Industrial studs
- Washers and accessories
Project Procurement
Customers can provide drawings, specifications, standards, dimensions, quantities and delivery requirements for project-based quotation.
Related specs: ASTM A325 hex bolts M12–M64 · DIN 125 / 127 washers · foundation anchor bolts M12–M72
DISCUSS YOUR PROJECT
Fastener Installation Tools & Impact Sockets
Supporting tools for bolting, anchoring and assembly work. Supplied alongside fastener orders to reduce separate sourcing.
Impact Sockets · Torque Tools · Anchor Setting Tools · Metric / Imperial
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Product Scope
Complementary fastening tools and installation accessories can be discussed according to specific construction, maintenance and engineering requirements.
Typical Customers
- Construction contractors
- Steel structure installers
- Engineering companies
- Industrial maintenance teams
- Equipment installers
- Fastener distributors
Related specs: M6–M24 expansion anchors · self-drilling roofing screws · ASTM A325 hex bolts
ASK ABOUT TOOLSFasteners Specified to Project Requirements
Standard and grade requirements should always be confirmed against the customer’s drawing, specification or applicable project standard.
ASTM
ASTM A325 / A490 structural bolts, A193 / A194 stud bolts and related fastening requirements for structural and industrial applications.
DIN
DIN 931 / 933 / 934 / 125 / 127 / 975 dimensional and product specifications commonly used for metric bolts, nuts, washers and threaded rods.
GB
GB/T 1228 / 1229 / 1230 / 97 / 5782 Chinese standard fasteners for customers requiring Chinese-standard dimensions and specifications.
ISO
ISO 4014 / 4017 / 4032 / 7089 international fastener specifications and metric fastening requirements for global projects.
Standard and Grade Comparison
The table below summarizes the practical differences buyers usually ask about before choosing a specification. Final selection should always be confirmed against the project drawing and corrosion class.
| Comparison | Practical Difference |
|---|---|
| ASTM A325 vs A490 | A325 is the common structural bolt for steel frames, available in type 1 (carbon steel) and type 3 (weathering steel). A490 offers higher tensile strength and is used where the connection requires a smaller bolt count or higher preload. A490 has stricter hardness limits and is not hot dip galvanized in the same way as A325. |
| Grade 8.8 vs 10.9 vs 12.9 | 8.8 is medium carbon steel, quenched and tempered, suitable for general structural and machinery use. 10.9 uses alloy steel with higher tensile and yield strength for heavier structural and equipment joints. 12.9 is high-strength alloy steel used where space is limited and higher preload is required, but it is more sensitive to hydrogen embrittlement after plating. |
| DIN 931 vs DIN 933 | DIN 931 is a partially threaded hex bolt, with an unthreaded shank below the head. DIN 933 is fully threaded. DIN 931 is preferred where shear load acts on the shank; DIN 933 is used where clamping length must be adjusted or the bolt passes through a tapped hole. |
| Zinc Plated vs HDG vs Dacromet | Zinc plating is thin and suitable for indoor or sheltered conditions. Hot dip galvanizing gives a thicker zinc layer and is standard for outdoor structural and foundation work. Dacromet is a zinc-aluminium flake coating used where zinc plating is insufficient but hot dip galvanizing would affect thread fit or appearance. |
| Chemical vs Mechanical Anchors | Chemical anchors bond the rod to the concrete through an adhesive, giving better performance in cracked concrete and closer edge distances. Mechanical anchors rely on expansion or wedging and are faster to install, but performance depends more on substrate quality and hole cleaning. |
Documentation That Supports Project Approval
Project buyers usually ask for paperwork before they ask for price. These are the documents we can issue with an order.
ISO 9001 System
Quality management system covering incoming material, production, inspection and final release.
Material Traceability
Heat number and steel grade documentation can be provided with qualified orders.
Third-Party Inspection
Inspection reports from SGS, BV or customer-nominated agencies can be arranged before shipment.
Salt Spray & Coating Tests
Coating thickness and salt spray test data available for zinc plated, HDG and Dacromet finishes.
Tell Us Exactly What Your Project Requires
A quote is only as accurate as the spec behind it. The table below lists what we need to price a fastener line correctly.
| Parameter | Typical Requirement |
|---|---|
| Product | Bolts / Nuts / Studs / Anchors / Screws / Washers |
| Standard | ASTM / DIN / GB / ISO / Customer Specification |
| Diameter | Required nominal diameter |
| Length | Required bolt / rod / screw length |
| Grade | 8.8 / 10.9 / 12.9 or specified grade |
| Material | Carbon steel / Stainless steel / Specified material |
| Finish | Zinc plated / Black / Other specified treatment |
| Quantity | Required order quantity |
| Destination | Country / Port / Delivery location |
Built Around Real Project Requirements
Our fastener portfolio is organized around the applications and procurement requirements of professional construction and industrial customers.
Steel Structures
Structural bolts, nuts, washers and foundation anchoring systems.
Construction
Anchors, threaded rods, screws and general construction fasteners.
Infrastructure
Fastening requirements for bridges, infrastructure and engineered construction projects.
Industrial Plants
Stud bolts, structural fasteners and industrial fastening systems.
Machinery
High strength and industrial fastening components for equipment.
Energy Projects
Anchor bolts, structural fasteners and project-specific components.
Steel Fabrication
Bolts, nuts, washers and fastening accessories for fabrication.
Engineering Contractors
Bulk fastening procurement based on drawings and specifications.
From Specification to Quotation
Send your requirements, drawings or technical specifications through WhatsApp. The more complete the information, the more accurately the quotation can be prepared.
Send Requirements
Product type, standard, size, grade, quantity and destination.
Specification Review
Drawings, technical specifications and project requirements can be reviewed before quotation.
Quotation
Receive a quotation based on the confirmed product and project requirements.
Order Arrangement
Confirm specifications, quantity, packaging and delivery requirements before order processing.
Frequently Asked Questions
Common questions from professional fastener buyers and project procurement teams.
What information is required for a fastener quotation?
A usable fastener quotation needs the product type, standard or drawing, nominal diameter, length, property grade, material, surface finish, order quantity and delivery destination. For structural bolts, please also confirm whether the project requires ASTM A325 or A490, and whether hot dip galvanizing is specified. For custom items, send the drawing or a dimensioned sketch so the thread length, bend radius and projection can be confirmed before pricing.
Can you supply ASTM, DIN, GB and ISO standard fasteners?
Yes. Common references include ASTM A325 / A490 structural bolts, ASTM A193 B7 / B7M / B16 stud bolts, DIN 931 / 933 hex bolts, DIN 975 / 976 threaded rods, DIN 125 / 127 washers, GB/T 1228 structural bolts and ISO 4014 / 4017 hex bolts. If the project specification references a standard not listed here, send the clause or drawing and the requirement can be reviewed before quotation.
Can customized fasteners be supplied?
Yes. Non-standard dimensions, thread lengths, bend configurations, material grades and surface finishes can be produced against a drawing. Typical custom items include L / J / U foundation bolts, special stud bolts for pressure equipment, and anchor rods with specified thread engagement. For evaluation, send the drawing with diameter, total length, thread length, material grade, surface treatment and order quantity.
What is the minimum order quantity?
MOQ depends on product type, size, material and whether tooling is required. Standard stock items usually start from one pallet or one ton. Custom bent foundation bolts, special studs and non-standard washers are reviewed case by case because of setup and material minimums. If the requirement is below the normal MOQ, it is still worth sending the spec — in some cases small trial quantities can be arranged alongside a larger production run.
What are the typical lead times?
Standard fasteners are usually delivered 15 to 30 days after order confirmation, depending on size, coating and quantity. Hot dip galvanized items and custom bent anchor bolts typically need longer because of coating and forming steps. Third-party inspection, if required, adds time before shipment. For project schedules, send the required on-site date so production and inspection can be planned backwards from it rather than quoted as a flat lead time.
Which surface finishes are available?
Common finishes include zinc plated, hot dip galvanized, black oxide, Dacromet and customer-specified coatings. Zinc plating is typical for indoor or sheltered applications; hot dip galvanizing is used for outdoor structural and foundation work where coating thickness and salt spray resistance matter. Dacromet is often selected where zinc plating is not sufficient but hot dip galvanizing is not practical. Finish should be confirmed against the project’s corrosion class and expected service life.
Do you provide material certificates and inspection reports?
Material traceability documentation and third-party inspection reports can be provided when required by the project specification. Typical documents include heat number and steel grade records, mechanical property reports, coating thickness measurements and salt spray test data. Inspection by SGS, BV or a customer-nominated agency can be arranged before shipment. Please state the document requirement in the inquiry so it is included in the quotation rather than added later.
Which trade terms do you support?
FOB, CIF, CFR and DDP can be discussed according to destination port and project delivery requirements. FOB is common for customers with their own forwarder; CIF and CFR are used when shipping cost should be included in the quotation. DDP can be reviewed for project deliveries where customs clearance and inland transport need to be handled by the supplier. The trade term affects both pricing and responsibility split, so it should be confirmed at inquiry stage.
Can samples be provided before bulk order?
Samples can be arranged for evaluation. Sample cost and freight are confirmed based on product type and destination. For standard items, samples are usually drawn from current stock. For custom or coated items, a small trial batch may be produced, which affects both cost and lead time. When requesting samples, confirm the specification to be tested, the quantity needed and whether the sample should match the production finish exactly.
What industries do these fasteners serve?
Typical applications include steel structures, bridges, infrastructure, industrial plants, pressure equipment, machinery, energy projects and engineering procurement. Structural bolts and foundation bolts are used in steel frame and equipment base work; stud bolts are used in flange and piping connections; anchors and threaded rods are used in concrete fixing and support systems. The same product category can require different standards depending on the industry, so the application should be stated in the inquiry.
How do I request a quotation?
Send the product name, standard or drawing, diameter, length, grade, material, surface finish, quantity and delivery destination through WhatsApp, email or the inquiry form. Drawings can be attached for project-specific requirements. If the standard is not yet decided, describe the application and load condition instead — the requirement can be reviewed and a suitable reference proposed before pricing.
Have a Fastener Requirement?
Send your product specification, standard, size, grade, quantity, drawings or project requirements. We can review the information and discuss the appropriate fastening solution.
Product specifications should be confirmed against the applicable project standard and customer requirements.