Find a huge selection of DIN6921 Stainless Steel A2-70 Hex Head Flange Bolts With Serrated from China at Gangtong Zheli. Provide professional after-sales service and the right price, looking forward to cooperation. DIN6921 Stainless Steel A2-70 Hex Head Flange Bolts With Serrated features offer enhanced security through their serrated flange design, catering to various industrial applications where secure fastening is critical. These bolts, conforming to DIN standards, are designed to provide reliable and stable connections while resisting corrosion in diverse environmental conditions.

Grade 4.8 or 8.8 Carriage Bolt With Zinc Plated or Hot Dip Galvanized Surface

A flange bolt differs from the common bolt in that it has a wider surface area under the head to provide for an even distribution of clamping pressure. This wider surface acts like a washer, eliminating the need to combine one with this kind of bolt. Flange bolts are available in numerous sizes, strengths, and configurations. Like most other types of fasteners on the market, metric flange bolts are available for any applications that require them.A flange bolt distinguishes itself from standard bolts by featuring a broader surface area beneath its head, facilitating an even distribution of clamping force. This extended surface serves a function akin to a washer, negating the necessity of using an additional washer in conjunction with this specific type of bolt. Flange bolts come in a wide array of sizes, strengths, and variations to accommodate various applications. Metric flange bolts are also readily accessible, catering to specific needs requiring this type of fastener.

CLASS	4.6;4.8	5.8	6.8	8.8		9.8		10.9	12.9
SIZE	ALL SIZE			≦M12	>M12	≦M8	>M8	ALL SIZE
COMMON MATERIALS	1008 ~ 1015	1012 ~1017	10B21 / 1022	10B21	10B33	10B21	10B33	10B33 / SCM435/ML20MnTiB	SCM435
	ML08AL SWRCH8A~ SWRCH15A	SWRCH15A~ SWRCH18A	SWRCH22A	35K		35ACR	10B35		AISI 4140
HEAT TREATMENT(YES/NO)	NO			YES

Flange bolts are specially designed with anti-rotational "teeth" that grip and firmly engage with the material being fastened. These "teeth" are similar in function to the locking rings on beverage bottles, offering resistance when turned backward, requiring additional force. This distinctive design sets flange bolts apart from regular bolts and strategically enhances their performance.

Complementing the flange bolt is the flange nut, which resembles an ordinary nut but features one side that is wider than the other. This asymmetrical design ensures the even distribution of pressure. When used together, the flange nut and flange bolt create a secure fastening connection. In some scenarios, this combination may eliminate the need for separate washers, potentially reducing overall costs.

Applying the proper torque to the flange bolt-nut pairing is crucial, ensuring that the fasteners remain securely tightened without self-loosening. These types of flange bolts typically require an external force, like that of a mechanic, to loosen them, ensuring enhanced security and stability once installed.

Product Application

The choice of flange bolts for joining flanges isn't strictly determined by a specific type, like standard or metric, but rather by the physical characteristics of the flange system itself. Factors such as the size of the flange system or the number of boltholes typically indicate the appropriate bolt size or grade needed. The bolt grade signifies its strength, with higher-grade bolts offering increased strength. For instance, high-pressure connections, like those found in steam lines, often necessitate the use of grade eight bolts for optimal reliability and safety.

Flange bolts are versatile and compatible with various flange systems. The sizes and grades (strength ratings) of these bolts may vary depending on the specific application requirements. These bolts are available in standard measurements, such as 1/4 inch and 1/2 inch, as well as metric measurements like 8mm and 10mm. Engineered to securely hold connections without slipping or loosening, flange bolts are prevalent in numerous industrial applications where establishing secure connections is critical to the production process.