As the most popular concealed connector for industrial aluminum profile frame assembly, half round head hex socket bolts, also known as pan head hex socket screws or mushroom head screws, are mainly applied for in-groove connection of European standard aluminum profiles. They are core fasteners to achieve flush-surface and welding-free assembly.

Application Scope

Fit for European standard 20/30/40/45 series aluminum profiles with 6mm, 8mm and 10mm groove widths, to be used together with spring fasteners.

Main Function

Realize concealed right-angle and cross connection between profiles, and fasten angle brackets, connecting plates, hinges and other accessories.

Core Features & Advantages

Concealed Installation & Flush Surface

The mushroom head can be fully sunk into profile grooves, leaving no protrusion on the outer surface. It keeps neat appearance and prevents scratches on personnel and equipment, ideal for workbenches and safety enclosures.

Anti-loosening & Shockproof with Spring Fasteners

Matched with dedicated spring fasteners which expand inside profile grooves to enlarge contact area. It delivers better locking effect and higher connecting strength than ordinary bolt and nut sets, perfectly suitable for frequently vibrating production and conveyor lines.

Flexible Assembly & Easy Adjustment

No thread tapping on profiles is required. Only through holes need to be drilled for installation. The frame can be quickly disassembled and restructured later, fully meeting flexible upgrading demands in lean production.

Wide Compatibility & Versatile Use

Besides direct profile connection, it is applicable to fix almost all aluminum profile accessories including angle brackets, connection plates, movable hinges, handles and door stoppers.

Application Scenarios

• Aluminum profile workbenches & racks: Right-angle connection between uprights and cross beams, fixed assembly of multi-layer structures.

• Machine safety enclosures: Internal connection for heavy-duty 40/45 series frames with balanced strength and appearance.

• Workshop safety fences & partitions: Stable connection of profile posts and rails for higher safety via anti-vibration performance.

• LCIA low-cost automation equipment: Connection and fixing of customized support frames and adjustable brackets.

• Assembly & conveyor line supports: Joint connection of legs and cross beams allowing convenient position adjustment.

Matarial	High-strength alloy steel with a hardness of 12.9 or 304 stainless steel
Width	6mm slot width	8mm slot width	10mm slot width
Order No.	XY-M6*10	XY-M8*12	XY-M10*30
	XY-M6*12	XY-M8*16
	XY-M6*16	XY-M8*20
	XY-M6*20	XY-M8*25
		XY-M8*30
Note: Multiple specifications are available. Please contact us for details.

Company Profile

Shanghai Xuying Industrial Co., Ltd., established in January 2013, boasts nearly 20 years of experience in the industry.

Currently, our company primarily engages in the research, development, production, and sales of first-generation lean pipes (steel-plastic composite pipes), second-generation lean pipes (stainless steel pipes), third-generation lean pipes (aluminum alloy pipes), and related accessories, as well as aluminum profiles, accessories, and equipment.

The finished equipment we can currently provide for enterprises includes: lean pipe workbenches, lean pipe assembly lines, U-shaped production lines, flow rail lean pipe racks, lean pipe storage racks, lean pipe turnover racks, aluminum profile workbenches, aluminum profile frames, aluminum profile partition walls, and other industrial finished product series.