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Pernos estructurales ASTM de acero inoxidable con cabeza hexagonal pesada de alta resistencia y cabeza hexagonal grande.

Envío Global Disponible.
Fabricación OEM y personalizada.
Pedidos de gran volumen admitidos.
Soporte para Licitaciones y Pedidos de Proyectos.
Múltiples acabados de superficie.
Control de Calidad Estricto.
Certificados de materiales disponibles.

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Product Description

The ASTM Stainless Steel Heavy Hex Structural Bolt is a high-strength fastening solution designed for structural steel connections, machinery assembly, construction projects, infrastructure, marine engineering, and heavy-duty industrial applications. Made from premium stainless steel, this bolt provides excellent corrosion resistance, stable mechanical performance, and long service life in demanding environments.

Compared with ordinary hex bolts, heavy hex structural bolts feature a larger hex head bearing surface, which helps distribute load more evenly and provides stronger clamping force in structural connections. The partially threaded design offers improved shear resistance, while the precision-machined threads ensure reliable assembly with matching nuts and washers.

These bolts can be supplied according to customer requirements, drawings, samples, or applicable ASTM specifications. Common stainless steel material options include 304, 316, A2, A4, ASTM F593, ASTM A193 B8, and ASTM A193 B8M.

Key Features

Heavy hex head design for structural fastening
Made from stainless steel for excellent corrosion resistance
High strength performance for demanding applications
Partial thread design for improved structural connection strength
Suitable for steel structure, machinery, marine, and construction use
Available in multiple ASTM-related material grades
Smooth silver metallic surface with clean appearance
OEM and ODM customization available

Product Specifications

Artículo	Especificación
Product Name	Stainless Steel Heavy Hex Structural Bolt
Estándar	ASTM / Customized Standard
Bolt Type	Heavy Hex Structural Bolt
Tipo de cabeza	Large Hex Head / Heavy Hex Head
Material	Stainless Steel
Common Grades	304, 316, A2, A4, ASTM F593, ASTM A193 B8, ASTM A193 B8M
Acabado superficial	Plain Stainless Steel / Polished / Passivated
Tipo de hilo	UNC, UNF, Metric Thread Optional
Thread Design	Partial Thread / Full Thread Optional
Rango de tamaños	Customized Sizes Available
Aplicación	Steel Structure, Construction, Machinery, Marine, Infrastructure
Servicio al cliente	OEM / ODM Supported

Material Options

Material Grade	Equivalent / Type	Main Feature	Typical Application
Stainless Steel 304	A2	Good corrosion resistance and general strength	Construction, machinery, general fastening
Stainless Steel 316	A4	Better corrosion resistance, especially in humid or marine environments	Marine, chemical, outdoor applications
ASTM F593	Stainless Steel Bolt Standard	Common ASTM stainless bolt specification	Industrial and structural fastening
ASTM A193 B8	304 Stainless Steel Type	High-temperature and pressure applications	Flanges, valves, pressure equipment
ASTM A193 B8M	316 Stainless Steel Type	Better corrosion resistance than B8	Marine, chemical, high-corrosion areas

Surface Finish Options

Acabado superficial	Appearance	Benefit
Plain Stainless Steel	Natural silver color	Clean appearance, good corrosion resistance
Polished Finish	Bright silver surface	Better appearance and smoother surface
Passivated Finish	Silver stainless surface	Improves stainless steel corrosion resistance
Waxed / Lubricated	Silver with protective layer	Easier installation and reduced thread galling
Customized Finish	According to request	Suitable for special project requirements

Product Advantages

Advantage	Descripción
High Corrosion Resistance	Stainless steel provides better rust resistance than carbon steel.
Heavy Hex Design	Larger head size improves bearing area and load distribution.
Strong Structural Fastening	Suitable for steel frames, machinery, bridges, and heavy equipment.
Long Service Life	Ideal for harsh, humid, outdoor, and marine environments.
Flexible Customization	Size, thread, length, material grade, and packaging can be customized.
Professional Assembly Support	Matching nuts and washers can be supplied as a complete set.

Common Applications

The ASTM Stainless Steel Heavy Hex Structural Bolt is widely used in applications where both strength and corrosion resistance are required.

Industry	Typical Application
Steel Structure	Steel frame connection, beam assembly, structural joints
Construction	Building support systems, metal plates, brackets
Marine Engineering	Dock equipment, ship components, coastal structures
Machinery	Equipment installation, machine frames, heavy-duty fixing
Infrastructure	Bridges, rail systems, power facilities
Chemical Industry	Corrosive environment fastening, pressure equipment
Energy Projects	Wind power, solar brackets, pipeline systems

Why Choose Stainless Steel Heavy Hex Structural Bolts?

Stainless steel heavy hex structural bolts are designed for applications where ordinary fasteners may not provide enough durability or corrosion protection. The large hex head provides a stronger contact area, helping the bolt perform better in heavy-duty structural connections.

Unlike carbon steel bolts, stainless steel bolts offer natural corrosion resistance without requiring zinc plating or hot-dip galvanizing. This makes them suitable for long-term use in outdoor, wet, marine, or chemically exposed environments.

For projects requiring higher corrosion resistance, 316 stainless steel / A4 / ASTM A193 B8M is recommended. For general industrial use, 304 stainless steel / A2 / ASTM A193 B8 is commonly selected.

Available Custom Options

Custom Item	Opciones disponibles
Diámetro	M6–M64 / 1/4″–2-1/2″ / Custom
Longitud	According to drawing or sample
Thread	Metric, UNC, UNF, Coarse Thread, Fine Thread
Material	304, 316, A2, A4, ASTM F593, ASTM A193 B8/B8M
Tipo de cabeza	Heavy Hex Head, Standard Hex Head, Customized Head
Thread Length	Partial Thread, Full Thread, Custom Thread Length
Surface	Plain, Polished, Passivated, Lubricated
Packaging	Bulk Carton, Small Box, Wooden Case, Pallet

Matching Nuts and Washers

For structural fastening projects, bolts are usually used together with matching nuts and washers to ensure stable performance.

Matching Part	Available Option
Nueces	Heavy Hex Nut, Hex Nut, ASTM A194 Nut, Stainless Steel Nut
Lavadoras	Flat Washer, Structural Washer, Hardened Washer, Stainless Steel Washer
Assembly Set	Bolt + Nut + Washer Set
Packaging	Individual Set Packing / Bulk Packing

Control de calidad

Inspection Item	Purpose
Dimension Inspection	Check diameter, length, head size, shank, and thread length
Thread Gauge Test	Ensure accurate thread fit with matching nuts
Material Test	Confirm stainless steel grade and chemical composition
Hardness Test	Verify mechanical performance
Tensile Test	Check load-bearing capacity
Surface Inspection	Ensure clean surface without cracks, burrs, or defects
Packaging Inspection	Ensure safe export packing and correct labels

Preguntas frecuentes

1. What is a heavy hex structural bolt?

A heavy hex structural bolt is a bolt with a larger hex head than a standard hex bolt. The larger head provides a bigger bearing surface and is commonly used in structural steel connections and heavy-duty fastening applications.

2. What material is this bolt made from?

This product is made from stainless steel. Common options include 304, 316, A2, A4, ASTM F593, ASTM A193 B8, and ASTM A193 B8M.

3. Is stainless steel suitable for outdoor use?

Yes. Stainless steel bolts are suitable for outdoor use because they provide good corrosion resistance. For marine or highly corrosive environments, 316 stainless steel or A4 stainless steel is recommended.

4. What is the difference between 304 and 316 stainless steel bolts?

304 stainless steel is suitable for general corrosion-resistant applications. 316 stainless steel contains molybdenum, which provides better resistance to salt, moisture, and chemical corrosion.

5. Can these bolts be made according to ASTM standards?

Yes. We can manufacture or supply stainless steel bolts according to ASTM-related requirements, such as ASTM F593, ASTM A193 B8, ASTM A193 B8M, or customer-specified drawings and technical requirements.

6. Are these bolts fully threaded or partially threaded?

Both options are available. The product image shows partially threaded hex bolts, but full thread bolts can also be customized according to project requirements.

7. Can you supply nuts and washers together?

Yes. Matching stainless steel heavy hex nuts, flat washers, structural washers, and complete bolt-nut-washer sets can be supplied.

8. Can the size and length be customized?

Yes. Diameter, length, thread pitch, thread length, material grade, surface finish, and packaging can all be customized according to drawings, samples, or purchase specifications.

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