Hex Flange Cap Nut GB/T 802.3 - Carbon Steel Electro-Galvanized Fastener

Hex Flange Cap Nut GB/T 802.3 - Carbon Steel Electro-Galvanized Fastener

Product Description

Standard:GB/T 802.3

The hex flange cap nut (also known as hexagonal flange cap nut) is a high-performance fastener integrating the functions of a hex nut, a flange washer, and a protective cap. Designed for industrial assembly and mechanical fastening, it features a hexagonal head for easy torque application, a integrated flange face (with serrations in most cases), and a closed cap-style top—combining reliability, anti-loosening performance, and corrosion protection in one component.

Core Structural & Functional Features

1. Hexagonal Head Design: The standard hexagonal shape enables compatibility with common tools (wrenches, sockets), ensuring efficient installation and disassembly even in confined spaces.
2. Integrated Flange Face: The built-in flange (a circular washer-like structure) eliminates the need for additional washers, increasing the contact area with the workpiece. Serrated flanges enhance anti-loosening performance by preventing rotation under vibration, making it ideal for dynamic load scenarios.
3. Closed Cap Style: The closed top seals the internal thread, protecting it from dust, moisture, debris, and corrosion—extending the fastener’s service life and maintaining connection integrity in harsh environments.

Application Scenarios:

Technical Specifications

d		M5	M6	M8	M10	M12	M16	M20	M24
P	coarse thread	0.8	1	1.25	1.5	1.75	2	2.5	3
	fine thread	/	/	1	1	1.5	1.5	2	2
	fine thread	/	/	/	1.25	1.25	/	1.5	/
dk	MAX	7.5	9.5	12.5	15	17	23	28	34
dc	MAX	11.8	14.2	17.9	21.8	26	34.5	42.8	46
e	MIN	8.79	11.05	14.38	17.77	20.03	26.75	32.95	39.55
h	MAX	9	11	14	18	22	30	32	36
	MIN	8.64	10.57	13.57	17.57	21.48	29.48	31	35
m	MAX	5	6	8	10	12	16	20	24
	MIN	4.7	5.7	7.64	9.64	11.57	15.3	18.7	22.7
SR	≈	3.75	4.75	6.25	7.5	8.5	11.5	14	17
s	MAX	8	10	13	16	18	24	30	36
	MIN	7.78	9.78	12.73	15.73	17.73	23.67	29.16	35
t	≈	0.5	0.8	0.8	0.8	1	1	1.2	1.2

Packaging

Carton Packaging	Outer Cartonbox Packaging	Pallet Packaging
Bolts are packed in neutral packaging boxes, with standard quantities arranged in small cartons. The exact number of units per carton will be confirmed with the customer to align with their specific requirements. Customized packaging configurations are available upon request.	The small cartons are then consolidated into larger master cartons for secure transportation and storage. The quantity per master carton can be customized based on client specifications or aligned with standard logistical requirements.	The palletized units are securely wrapped with waterproof film and reinforced with packaging straps. Customer-specific shipping marks or labels are affixed to each pallet, ensuring clear identification and compliance with logistics requirements. This final packaging stage guarantees weather-resistant protection and stability during transportation.

Hex flange cap nut carbon steel

GB/T 802.3 electro-galvanized fastener

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Hex Flange Cap Nut GB/T 802.3 - Carbon Steel Electro-Galvanized Fastener Images