PROFESSIONAL MANUFACTURER OF HARDWARE PRODUCTS
Jinan Meierde Industry Co., Ltd
Square head bolt customized
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Product introduction
Product Overview
Our custom square head bolts are precision-engineered fasteners designed for high-torque applications, secure locking, and a classic industrial appearance. Unlike standard hex bolts, the square head provides a larger bearing surface and allows for easy tightening with a wrench or adjustable spanner. We offer OEM and ODM services for square head bolts in various materials, sizes, thread types, and surface finishes.
Whether you need bolts for timber construction, agricultural machinery, heavy equipment, rail fastening, or vintage restoration, we can manufacture them according to your drawings, samples, or specific requirements.
Key Features
Square head design for high torque and secure grip
Fully customizable dimensions, materials, threads, and finishes
High strength and durability for heavy-duty applications
Corrosion-resistant options available
Precision machining with strict tolerance control
OEM/ODM service – produce according to drawings or samples
Competitive factory price and fast lead time
Bulk production capacity with reliable quality
Technical Specifications
| Item | Details |
|---|---|
| Product Name | Square Head Bolt / Customized Square Head Bolt |
| Material | Carbon steel, alloy steel, stainless steel 304/316,etc. |
| Grade | 4.8, 6.8, 8.8, 10.9, 12.9, A2-70, A4-80, etc. |
| Diameter | M3–M64 / #4–2" / customized |
| Length | 10mm–1000mm / 1/2"–40" / customized |
| Head Type | Square head, square neck, dome head, countersunk head, etc. |
| Thread Type | Metric, UNC, UNF, BSW, BSF, left-hand, right-hand |
| Thread Style | Full thread, partial thread, fine pitch, coarse pitch |
| Surface Finish | Plain, black oxide, zinc plated, hot-dip galvanized, nickel plated, chrome plated, Dacromet, etc. |
| Standard | DIN 478 / DIN 479 / DIN 480, ANSI B18.2.1, ISO, or custom drawings |
| Tolerance | ±0.01mm or according to customer requirements |
| MOQ | Negotiable, usually 1,000–5,000 pcs |
| Sample | Available for quality evaluation |
| Packaging | Carton + pallet, or customized packaging |
| Delivery Time | Usually 15–30 days after order confirmation |
Customization Options
We can customize your square head bolts in the following ways:
Head shape and size – square, square neck, rounded, or special design
Shank diameter and length – from small precision bolts to large heavy-duty bolts
Thread size, pitch, and length – metric, imperial, or special threads
Square neck dimensions – for anti-rotation applications
Hole in head – for safety wire or locking pin
Material and grade – carbon steel, alloy steel, stainless steel, brass, etc.
Surface treatment – zinc, HDG, black oxide, nickel, chrome, etc.
Logo and marking – brand, grade, or custom markings
Packaging – neutral carton, branded box, or customer-specific packaging
Drawings and samples – welcome for custom production
Applications
Custom square head bolts are widely used in:
Timber construction and woodworking
Agricultural machinery and equipment
Heavy equipment and construction machinery
Rail fastening and railway systems
Mining and tunneling equipment
Vintage car and motorcycle restoration
Industrial machinery and assembly
Marine and offshore applications
Furniture hardware and structural connections
Power transmission and steel structures
| ①,当螺栓长度L小于表格中螺纹长度b值时，应按全螺纹加工。 |
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Jinan Western Industrial park, Jinan City, Shandong Province
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