DIN 931 BOLTS
What is a DIN 931 Bolt?
DIN 931, also known as ISO 4014, is a German and international standard for partially threaded hex bolts. These bolts feature a cylindrical body divided into a threaded section and an unthreaded section. At Quang Thai, we manufacture DIN 931 bolts with strength grades ranging from 4.6 to 12.9 and diameters from M16 to M80.
Key Features of DIN 931 Bolts
Material Composition
Quang Thai produces DIN 931 – ISO 4014 bolts using high-quality materials, including:
• Carbon steel: C45, S45C, etc.
• Alloy steel: SCM430, SCM440, etc.
• Stainless steel: A2-70, A4-70, SUS 304, SUS 316, etc.
Strength Grades
Our partially threaded DIN 931 – ISO 4014 bolts are available in strength grades ranging from 4.6 to 12.9, ensuring suitability for different applications and engineering requirements.
Size Standards
All our DIN 931 – ISO 4014 bolts comply with the DIN 931-1987 standard, which defines the dimensions for hex head bolts with a partially threaded shaft.
Surface Treatment Options
To enhance durability and corrosion resistance, Quang Thai offers various surface treatments for DIN 931 bolts, including:
• Black oxide coating
• Hot-dip galvanizing
• Electro-galvanizing
• Geomet and Dacromet coatings
For high-strength bolts (grade 10.9 and above), hot-dip galvanizing and electro-galvanizing are not recommended due to the risk of hydrogen embrittlement, which can weaken the material and cause cracking.
Applications of DIN 931 Bolts
DIN 931 – ISO 4014 bolts are widely used across multiple industries due to their strength and versatility. Common applications include:
• Construction – Civil, industrial, and agricultural projects
• Machinery & equipment – Manufacturing, assembly, and installation
• Automotive & transportation – Vehicle and heavy equipment assembly
• Chemical, oil & gas, and marine industries
Pricing of DIN 931 Bolts
The price of DIN 931 bolts depends on several factors:
• Material – Different materials affect pricing, with stainless steel generally costing more than carbon steel.
• Strength grade – Higher-grade bolts (e.g., 8.8 vs. 4.6) cost more due to their superior performance.
• Size – Larger diameters and longer lengths increase the price. For example, an M42 bolt costs more than an M39, and an M20x120 bolt costs more than an M20x100.
• Surface treatment – Some coatings, like hot-dip galvanizing, are more expensive due to their superior corrosion resistance compared to electro-galvanizing.
Why Choose DIN 931 Bolts from Quang Thai?
Quang Thai is a trusted manufacturer of DIN 931 – ISO 4014 bolts in Vietnam. With a strong reputation for quality and competitive pricing, we prioritize reliability and customer satisfaction. Our commitment to excellence ensures that every bolt we produce meets the highest industry standards.
☎ Contact us at +84 933 220 468 to get the best-quality DIN 931 bolts for your needs. Quang Thai is honored to serve you!
