Customized Bolt Stainless Steel 304 316 A2 A4 Hex Flange Bolts with Neck Anti Theft Hex Head Shear Bolt Torsional Shear Bolt Special-Shaped Bolts

• Customization: Available
• Material: Stainless Steel
• Type: Special Shaped Bolt
• Model NO.: Special-shaped bolts
• Connection: Common Bolt
• Head Style: Hexagonal
• Standard: Non Standard
• Grade: 4.8,5.8,8.8,9.8,10.9,12.9
• Application: Machinery, Environmental, Building
• Finish: Plain
• Name: Button Head Anti Theft Hex Head Shear Bolt
• Brand Name: Goshen
• Samples: Free
• Delivery: 3-20days
• Payment Term: T/T or L/C
• Packing: Carton+Pallet
• Size: M3-100
• Delivery Time: 7-25 Days
• Certification: ISO, RoHS, SGS, TUV
• Transport Package: Bags+Cartons+Pallets
• Specification: DIN, ISO, GB, ANSI, Bs
• Trademark: lxu
• Origin: Zhejiang, China
• HS Code: 7318151001
• Production Capacity: 500ton/Year
• Package Size: 25.00cm * 15.00cm * 10.00cm
• Package Gross Weight: 25.000kg

Product Description

Product Description

High-Quality 304/316 Stainless Steel Hex Flange Bolts with Neck

| Cone Neck Hex Flange Screws | Automotive & Machinery Fasteners | Customization Available

This series of products is Stainless Steel Hex Flange Bolts with Neck, made of high-quality 304 (A2) or 316 (A4) stainless steel through cold heading. Its core features are the conical neck beneath the hex head and the widened flange. The neck design effectively distributes stress, while the flange acts as a built-in washer, increasing the stress area and protecting the connecting surface. The hex head can be used with a wrench to apply high torque for strong locking. Compliant with DIN/ISO standards, the full-thread design ensures smooth engagement. Widely used in automotive, motorcycle, machinery, construction steel structures, and outdoor facilities requiring high strength, corrosion resistance, and anti-loosening performance.

Drawings & Dimensions

Detailed CAD drawings and dimensional diagrams are available for download here or upon inquiry. Our engineering team can provide tailored designs to meet specific project requirements.

The main business scope of the company

We are a professional China screws manufacturer with over 15 years of deep expertise in the fasteners factory industry. Our diverse product portfolio covers mainstream categories, including 304 stainless steel screws, self tapping screws, self drilling screws (Tek screws), machine screws, wood screws, as well as eye screws and hex bolts.
Strictly compliant with DIN, ANSI, BS, and JIS international standards, our products are available in a full range of drive types, including Phillips, Pozi, and Torx drives. We also offer comprehensive custom screws services tailored to your specific requirements. Leveraging our competitive factory direct price and fast delivery advantages, we proudly serve as a reliable China supplier for global wholesale hardware distributors, engineering procurement managers, and OEM clients seeking high-quality bulk screws. We are committed to providing free samples available for your testing needs, and all our products fully comply with RoHS and REACH environmental standards.

Features

Conical Neck Design, Stress Distribution

The head and shank are connected by a smooth conical neck.

Advantage: Effectively distributes stress concentration at the head-to-shank junction, improving fatigue resistance and impact resistance, preventing breakage, and extending service life.

Integrated Flange, Built-in Washer Function

Standard Hex Head, High Torque Without Slipping

Premium Stainless Steel, Superior Corrosion Resistance

A widened flange is integrated below the neck, formed together with the bolt body.
Advantage: No additional flat washer required. The flange itself increases the stress area, distributes pressure, and protects the connecting surface from scratches or crushing..

The head has precise across-flats dimensions and standard angles, perfectly fitting wrenches/sockets.
Advantage: Large stress area, capable of applying high torque without slipping or damaging the corners, suitable for heavy-duty structures requiring strong locking.

Made of high-quality 304/316 stainless steel, with a bright, rust-free surface.

Advantage: 304 is suitable for most outdoor and humid environments; 316 contains molybdenum, offering excellent resistance to chloride corrosion, suitable for marine environments, chemical equipment, food and medical machinery, and other harsh conditions.

Pro Test Data

Salt spray test: For 304 material, no red rust for ≥ 72 hours; for 316 material, no red rust for ≥ 200 hours (with Dacromet coating, it can reach 500 hours+).
 

Torque test: The destructive torque of M5 304 self-tapping screws ≥ 8.0 N.m, meeting the GB/T 3098.6 standard.
 

Hardness test: The hardness of the self-drilling tail can reach HRC 50-55, ensuring worry-free penetration of high-hardness thin plates..

Specification

Product Name	Stainless Steel Hex Flange Bolts with Neck
Material	SUS304 (A2-70) / SUS316 (A4-70)
Head Type	Hex Flange Head (with conical neck)
Thread Size	M5,M6,M8,M10,M12,M16,M20
Length	10mm - 300mm (Customizable)
Standard	DIN6921 / ISO4162 / GB5787/Customized
Tensile Strength	≥ 700 MPa (A2-70/A4-70)
Surface Treatment	Plain (Bright), Passivated
Packaging	Bulk/Carton/Wooden Case/Pallet, Customizable
Delivery time	In-stock fast shipping / Custom 30 days

Application Scenario

APPLICATION SCENARIO

New Energy / Solar Mounting: Solar panel mounting, component mounting blocks (using stainless steel self-drilling screws and hexagonal bolts, resistant to outdoor exposure and rain). 
 
Construction: Curtain wall keel connection, steel structure assembly, window and door fixation (requiring high strength and large torque anti-shear). 
 
Furniture: Panel furniture assembly, hardware fixation (using countersunk wood screws and machine teeth screws, with smooth and aesthetically pleasing surface). 
 
Electronics & Machinery: PCB board fixation, instrument housing assembly (using precision miniature screws and internal hexagonal screws).

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Company Profile

JIAXING GOSHEN HARDWARE CO.,LTD

Since starting our business in 2010, we have adhered to the concept of "exquisite manufacturing". Beginning from a small processing factory, we have gradually developed into a modern warehouse-style factory equipped with 30 automated cold heading machines, threading machines and fully automatic screening machines. We focus on addressing the pain points of "uneven quality and delayed delivery" that customers encounter in the purchase of fasteners, and have now grown into an influential fastener supplier in the region.

Jiaxing Goshen Hardware Co., Ltd is located in Jiaxing Intelligence Innovation Park, the city is famous as the "Hometown of Fasteners". It close to Hangzhou Bay Bridge, Shanghai Port, Ningbo Port and Jiaxing Zhapu port, which make it have strategic and convenient transportation. As a leading integrated manufacturer and trader, we pride ourselves on delivering top-tier fasteners that are the backbone of industries worldwide. Our comprehensive range of products, from standard screws and bolts to customized precision components, is crafted with meticulous attention to detail and stringent quality controlOur company not only has advanced equipments, excellent quality and humanized management but also has outstanding foreign trade salesmen to supply best service for our customers. Please trust us! "Quality First and Customer service First  is our tenet and goal. And all this time, we are devoting ourselves to developing products for customer`s requirements and establishing a long-term business relations with our esteemed customers. We sincerely hope to cooperate with clients from home and abroad, in order to seek common developments.

Technological Process

Cold heading forming → Thread rolling → Heat treatment → Surface treatment → Quality inspection and packaging

From the import of raw materials to the final delivery of the finished products, we strictly implement a three-level quality control system of "incoming material inspection + process inspection + full inspection of finished products". We use imported multi-station cold heading machines to ensure high concentricity and precise dimensions of the products, and guarantee that every screw is of high quality.

Authentic certification certificate

We are well aware of the strict compliance requirements of B-end buyers. Our company has obtained the ISO 9001:2015 quality management system certification; all exported products are equipped with SGS test reports, which comply with RoHS 2.0 and REACH SVHC EU environmental protection regulations, ensuring smooth customs clearance and no trade barriers for the products.

Customer reviews and global exhibition screenings

We have been providing services to globally renowned building materials chain supermarkets, large auto parts distributors and industrial groups for a long time. With stable delivery schedules, highly competitive prices and professional customized (OEM) services, we have received unanimous praise from our global customers.

FAQ

Q: Are you a trading company or a manufacturer?
A: We are a direct manufacturing factory with a complete production chain, integrating cold heading, thread rolling, heat treatment, and surface finishing. We produce and export directly, offering you the most competitive factory direct price without any middleman markups
 
Q: Can you provide free samples?
A: Yes! For standard products, we offer free samples for your quality testing. You only need to cover the international courier shipping cost (freight collect or prepaid), and the sample fee will be fully waived. For custom samples, a small mold or setup fee may be charged, but it will be fully refunded upon confirmation of the bulk order.
 
Q: Do your products meet European and American environmental standards?
A: Absolutely. All our screws, bolts, and fasteners are strictly produced to international standards and are fully RoHS 2.0 compliant, meeting REACH SVHC regulations. We can provide third-party SGS test reports to ensure your goods clear customs smoothly in EU and US markets.
 
Q: What payment terms do you support?
A:  We primarily accept T/T (Telegraphic Transfer), generally 30% deposit in advance, and 70% balance against the copy of the Bill of Lading (B/L). For regular and trustworthy long-term partners, we can negotiate more flexible payment terms, such as L/C at sight or monthly settlements.
 
Q: Can you provide custom packaging?
A:Of course. We highly value the retail and branding needs of our B2B clients. We can customize inner boxes, outer cartons, stickers, labels, and packaging with your company LOGO according to your design requirements. Whether it's small retail packaging for supermarket shelves or industrial pallet packaging for bulk use, we can perfectly match your needs.