Hexagon Flange Weld Nuts

China manufacturer Xiaoguo® Hexagon flange weld nuts is made of high-quality alloy steel of grade 10.9, with precise processing. Its tensile strength exceeds 1000 MPa. The welding points are stable, the load-bearing capacity is high, and a test report can be obtained.

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Product Description

The Hexagon flange weld nuts is a special fastener with a circular flange at the bottom and a hexagonal shape at the top. The bottom surface of the flange usually has three welding protrusions (or called bosses). This nut is welded firmly to the metal sheet through resistance welding (boss welding) after melting the protrusions, thus achieving a permanent threaded connection.

Compared with ordinary welding nuts, Hexagon flange weld nuts incorporates a flange surface, which can replace flat washers to distribute pressure and protect thin sheet components from being crushed. At the same time, the hexagonal head design makes it convenient to use standard wrenches or sockets for bolt assembly. This product is widely used in threaded connection scenarios of thin sheet metal structures such as automotive bodies, home appliance shells, electrical cabinets, and mechanical equipment.

Hexagon Flange Weld Nuts

Core structural features

The structural design of Hexagon flange weld nuts is centered around three key goals: "reliable welding, precise positioning, and convenient assembly". The core structural features can be summarized as follows:

（1）Hex Head

Shape: Regular hexagon. The dimensions of opposite sides comply with the ISO/DIN standard tolerances.

Function: It can be easily tightened using an open-end wrench or a socket, without the need for special tools.

Advantage: Compatible with ordinary hexagonal nuts, facilitating on-site assembly and maintenance.

（2）Flange Base

Shape: Enlarged flange surface

Function: Increase the contact area with the workpiece, distribute the pressure, and prevent the thin sheet material from deforming.

Replace the flat washers and reduce the number of components and assembly steps.

Advantages: Enhances connection reliability and reduces overall costs.

（3）Weld Projections

This is the most crucial feature that distinguishes Hexagon flange weld nuts from ordinary flange nuts.

Feature	Description
Quantity	The standard design consists of 3 pieces, evenly distributed at 120° along the bottom surface of the flange.
Shape	Spherical or conical-topped, with a smooth and rounded top without sharp edges.
Height	0.5 - 0.8 mm (adjustable according to the thickness of the base material)
Function	① During resistance welding, the protrusions melt first, forming a stable molten core;② Three-point automatic centering is achieved to prevent welding shift; ③ When not in the process of welding, the workpiece can be temporarily held in place, facilitating the positioning of the automated production line.
Advantages	The welding penetration is uniform, the positioning accuracy is high, and it is suitable for robotized automated welding.

Hexagon Flange Weld Nuts

Thread Sized			M5	M6	M8	M10	M12	M14	M16
d			M5	M6	M8	M10	M12	M14	M16
P	Coarse Thread Pitch		0.8	1	1.25	1.5	1.75	2	2
P	Fine Thread Pitch		/	/	/	/	15	1.5	1.5
C	Nominal Size	±0.1	0.8	0.8	1	1.2	1.2	1.2	1.2
dc	max		15.5	18.5	22.5	26.5	30.5	33.5	36.5
dc	min		14.5	17.5	21.5	25.5	29.5	32.5	35.5
e	min		8.2	10.6	13.6	16.9	19.4	22.4	25
e	max		8.5	10.9	14	17.5	20	23	26
f	Nominal Size	±0.25	1.7	2	2.5	3	3	4	4
g	Nominal Size	±0.1	4	5	6	7	8	8	8
m	min		4.7	6.64	9.64	12.57	14.57	16.16	18.66
m	max		5	7	10	13	15	17	19.5
S	max		8	10	13	16	18	21	24
S	min		7.64	9.64	12.57	15.57	17.57	20.48	23.48
b	max=nominal size		2.2	2.7	2.7	2.95	3.2	3.45	3.7
b	min		2	2.5	2.5	2.75	3	3.25	3.5
per 1000 unitsskg			/	5.7	12.2	21.8	29.4	45.8	/