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Cover Nuts

A cover nut is a fastening component used to cover the head of bolts, providing protection for the threads against environmental factors. The cover nut typically features a closed design to prevent dust, dirt, and corrosive substances from entering the threaded area, thereby extending the lifespan of bolts and nuts. They are widely used in automotive, machinery, construction, and household appliances. Cover nuts are usually made from plastic, metal, or stainless steel and offer excellent sealing and protection.

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Product Photos and Information

Key Features

Protective Function: Shields bolts and nuts from environmental effects

Closed Design: Prevents dust and dirt from entering the threads

Various Materials: Available in plastic, metal, or stainless steel

Easy Installation: Designed for quick installation and removal

Wide Application: Suitable for automotive, machinery, construction, and household appliances

Specifications Table

Parameter	Description
Material	Plastic, Metal, Stainless Steel
Shape	Round, Square, Hexagonal
Size	Customized based on bolt and nut dimensions
Surface Finish	No Finish, Coated, Galvanized
Applications	Automotive, Machinery, Construction, Appliances

Applications

Automotive Industry,Machinery Equipment,Building Structures,Household Appliances,Various Engineering Applications

Product Standards

thread size			M4	M5	M6	M8	M10	M10	M12	M12
d			M4	M5	M6	M8	M10	M10	M12	M12
P	Series 1	coarse teeth	0.7	0.8	1	1.25	1.5	1.5	1.75	1.75
	Series 2	fine teeth	/	/	/	1	1	1	1.5	1.5
	Series 3	fine teeth	/	/	/	/	1.25	1.25	1.25	1.25
d a	minimum		4	5	6	8	10	10	12	12
d a	maximum value		4.6	5.75	6.75	8.75	10.8	10.8	13	13
dk	maximum value		6.5	7.5	9.5	12.5	16	15	18	17
dw	minimum		5.8	6.8	8.3	11.3	15.3	14.3	17.2	16.2
and	minimum	Class A	7.66	8.79	11.05	14.38	18.9	17.77	21.1	20.03
and	minimum	Class B	7.5	8.63	10.89	14.2	18.72	17.59	20.88	19.85
x	maximum value	Series 1	1.4	1.6	2	2.5	3	3	/	/
		Series 2	/	/	/	2	2	2	/	/
		Series 3	/	/	/	/	2.5	2.5	/	/
G	maximum value	Series 1	/	/	/	/	/	/	6.4	6.4
		Series 2	/	/	/	/	/	/	5.6	5.6
		Series 3	/	/	/	/	/	/	4.9	4.9
h	max = nominal		8	10	12	15	18	18	twenty two	twenty two
	minimum	Class A	7.64	9.64	11.57	14.57	17.57	17.57	21.48	21.48
	minimum	Class B	7.42	9.42	11.3	14.3	17.3	17.3	21.16	21.16
m	maximum value		3.2	4	5	6.5	8	8	10	10
m	minimum		2.9	3.7	4.7	6.14	7.64	7.64	9.64	9.64
mw	minimum		2.32	2.96	3.76	4.91	6.11	6.11	7.71	7.71
SR	≈		3.25	3.75	4.75	6.25	8	7.5	9	8.5
s	max = nominal		7	8	10	13	17	16	19	18
	minimum	Class A	6.78	7.78	9.78	12.73	16.73	15.73	18.67	17.73
	minimum	Class B	6.64	7.64	9.64	12.57	16.57	15.57	18.48	17.57
t	minimum		5.26	7.21	7.71	10.65	12.65	12.65	15.65	15.65
t	maximum value		5.74	7.79	8.29	11.35	13.35	13.35	16.35	16.35
in	minimum		2	2	2	2	2	2	3	3
1000 pieces weight kg			/	/	4.66	11	20.1	/	28.3	/
thread size			(M14)	M14	M16	(M18)	M20	(M22)	(M22)	M24
d			(M14)	M14	M16	(M18)	M20	(M22)	(M22)	M24
P	Series 1	coarse teeth	2	2	2	2.5	2.5	2.5	2.5	3
	Series 2	fine teeth	1.5	1.5	1.5	1.5	2	2	1.5	2
	Series 3	fine teeth	/	/	/	2	1.5	1.5	2	/
d a	minimum		14	14	16	18	20	twenty two	twenty two	twenty four
d a	maximum value		15.1	15.1	17.3	19.5	21.6	23.7	23.7	25.9
dk	maximum value		twenty one	20	twenty three	26	28	31	33	34
dw	minimum		20.2	19.2	22.2	25.3	28.3	29.5	31.4	33.2
and	minimum	Class A	24.49	23.35	26.75	30.14	33.53	35.72	37.72	39.98
and	minimum	Class B	23.91	22.78	26.17	29.56	32.95	35.03	37.29	39.55
x	maximum value	Series 1	/	/	/	/	/	/	/	/
		Series 2	/	/	/	/	/	/	/	/
		Series 3	/	/	/	/	/	/	/	/
G	maximum value	Series 1	7.3	7.3	7.3	9.3	9.3	9.3	9.3	10.7
		Series 2	5.6	5.6	5.6	5.6	7.3	5.6	5.6	7.3
		Series 3	/	/	/	7.3	5.6	7.3	7.3	/
h	max = nominal		25	25	28	32	34	39	39	42
	minimum	Class A	24.48	24.48	27.48	31.38	33.38	38.38	38.38	41.38
	minimum	Class B	24.16	24.16	27.16	31	33	38	38	41
m	maximum value		11	11	13	15	16	18	18	19
m	minimum		10.3	10.3	12.3	14.3	14.9	16.9	16.9	17.7
mw	minimum		8.24	8.24	9.84	11.44	11.92	13.52	13.52	14.16
SR	≈		10.5	10	11.5	13	14	15.5	16.5	17
s	max = nominal		twenty two	twenty one	twenty four	27	30	32	34	36
	minimum	Class A	21.67	20.67	23.67	26.67	29.67	31.61	33.38	35.38
	minimum	Class B	21.16	20.16	23.16	26.16	29.16	31	33	35
t	minimum		17.65	17.65	20.58	24.58	25.58	28.58	28.58	30.5
t	maximum value		18.35	18.35	21.42	25.42	26.42	29.42	29.42	31.5
in	minimum		4	4	4	5	5	5	5	6
1000 pieces weight kg			57.2	/	54.3	95	104	129	/	216

About Us

We are dedicated to becoming a premier global provider of fastening solutions, elevating Chinese manufacturing to the forefront of the world stage, and making "Yude" production synonymous with excellence. To achieve this, we must demonstrate unwavering determination. Additionally, we carry the weight of social responsibility and the expectations of our employees. Looking ahead, we aspire to be recognized as a respected enterprise.