Dome Nut

Description:

Hex dome nuts or acorn nuts got their names due to the dome-shaped projection on one side of the nut. This is mostly used to protect objects close to the ends of screws from scratches and structural injuries. It also reduces the effects of physical mishaps on human skin if it somehow forcefully hits the fasteners. The external threads of the screws inserted into these nuts are securely enclosed within the dome. In addition to the protection it offers, these nuts provide the structure an aesthetically pleasing look.

It is available in stainless steel, carbon steel, and alloy steel to bear more wear and tear while also making it more corrosion resistant. The dome nuts come in different sizes, allowing you to use them on screws with any length. By default, the size of the nut is ‘small’ which means it is used for shorter screws. The small projections on the other side provide the structure with the necessary friction to prevent loosening due to vibrations.

Dimensional Standards:

DIN 1587

Size range:

Metric: M3 to M30
Inches: Nil

Dome Nut Dimensions

DIN 1587 - Hexagon domed cap nuts

Equivalent norms: PN 82181; UNI 5721;

Legend:
s - size of the hexagon
t - length of the thread
d - the nominal diameter of the thread
h - height of the nut
m - hight of the nut part
dk - head diameter
da - Turning diameter shrinkage
dw - contact surface diameter
mw - minimum wrenching height
Makings:
Steel: 6
Stainless: A2,A4
Plastic: Plastic Pa
Non Ferrous: Brass
Thread: 6H
Notes:
Table according to DIN 1587:
dimensions in mm

thread	Series 1	M4	M5	M6	M8	M10	M12	(M14)	M16	(M18)	M20	(M22)	M24
		Series 2	-	-	-	M8x1	M10x1	M12x1,5	(M14x1,5)	(M16x1,5)	(M18x1,5)	M20x2	(M22x1,5)	M24x2
		Series 3	-	-	-	-	M10x1,25	M12x1,25	-	-	(M18x2)	M20x1,5	(M22x2)	-
P	Series 1	0,7	0,8	1	1,25	1,5	1,75	2	2	2,5	2,5	2,5	3
da	min.	4	5	6	8	10	12	14	16	18	20	22	24
da	max.	4,6	5,75	6,75	8,75	10,8	13	15,1	17,3	19,5	21,6	23,7	25,9
dk	max.	6,5	7,5	9,5	12,5	15	17	20	23	26	28	33	34
dw	min.	5,9	6,9	8,9	11,6	14,6	16,6	19,6	22,5	24,9	27,7	31,4	33,3
e min.	Product grade A	7,66	8,79	11,05	14,38	17,77	20,03	23,35	26,75	30,14	33,53	37,72	39,98
e min.	Product grade B	7,5	8,63	10,89	14,2	17,59	19,85	22,78	26,17	29,56	32,95	37,29	39,55
x max.	Series 1	1,4	1,6	2	2,5	3	-	-	-	-	-	-	-
	Series 2	-	-	-	2	2	-	-	-	-	-	-	-
	Series 3	-	-	-	-	2,5	-	-	-	-	-	-	-
g2 max.	Series 1	-	-	-	-	-	6,4	7,3	7,3	9,3	9,3	9,3	10,7
	Series 2	-	-	-	-	-	5,6	5,6	5,6	5,6	7,3	5,6	7,3
	Series 3	-	-	-	-	-	4,9	-	-	7,3	5,6	7,3	-
h	max. nominal size	8	10	12	15	18	22	25	28	32	34	39	42
	min. P. grade A	7,64	9,64	11,57	14,57	17,57	21,48	24,48	27,48	32,38	33,38	38,38	41,38
	min. P. grade B	7,42	9,42	11,3	14,3	17,3	21,16	24,16	27,16	31	33	38	41
m	max.	3,2	4	5	6,5	88	10	11	13	15	16	18	19
m	min.	2,9	3,7	4,7	6,14	7,64	9,64	10,3	12,3	14,3	14,9	16,9	17,7
Mw	min.	2,32	2,96	3,76	4,91	6,11	7,71	8,24	9,84	11,44	11,92	13,52	14,16
r	approx.	3,25	3,75	4,75	6,25	7,5	8,5	10	11,5	13	14	16,5	17
s	Max. = nominal size	7	8	10	13	16	18	21	24	27	30	34	36
	min. P. grade A	6,78	7,78	9,78	12,73	15,73	17,73	20,67	23,67	26,67	29,67	33,38	35,38
	min. P. grade B	6,64	7,64	9,64	12,57	15,57	17,57	20,16	23,16	26,16	29,16	33	35
t	min.	5,26	7,21	7,71	10,65	12,65	15,65	17,65	20,58	24,58	25,58	28,58	30,5
t	max.	5,74	7,79	8,29	11,35	13,35	16,35	18,35	21,42	25,42	26,42	29,42	31,5
w	min.	2	2	2	2	2	3	4	4	5	5	5	6
Weight kg/1000pcs		-	-	4,66	11	20,1	28,3	-	54,3	95	104

Dome nut inches

One Piece Cap (Acorn) Closed-End Hex Cap Nuts, Low Crown

Nominal Size or Basic Major Diameter of Thread		Width Across Flats(F)		Width Across Corners(G)		Body Diameter(A)	Overall Height(H)	Hexagon Height(Q)	Drill Depth(T)	Full Thread(U)
Nominal Size or Basic Major Diameter of Thread				Max	Min	Body Diameter(A)	Overall Height(H)	Hexagon Height(Q)	Max	Min	Max	Min
6	0.138	0.3125	0.302	0.361	0.344	0.3	0.34	0.16	0.25	0.16
8	0.164	0.3125	0.302	0.361	0.344	0.3	0.34	0.16	0.25	0.16
10	0.19	0.375	0.362	0.433	0.413	0.36	0.41	0.19	0.28	0.19
43469	0.25	0.4375	0.428	0.505	0.488	0.41	0.47	0.22	0.34	0.25
43601	0.3125	0.5	0.489	0.577	0.557	0.47	0.53	0.25	0.41	0.31
43532	0.375	0.5625	0.551	0.65	0.628	0.53	0.62	0.28	0.45	0.38
43467	0.5	0.75	0.736	0.866	0.84	0.72	0.81	0.38	0.59	0.5
43593	0.625	0.9375	0.922	1.083	1.051	0.91	1	0.47	0.75	0.62
43528	0.75	1.0625	1.045	1.227	1.191	1.03	1.16	0.53	0.88	0.75

Two Piece Closed-End Hex Cap Nuts

Nominal Size or Basic Major Diameter of Thread		Width Across Flats(F)		Width Across Corners(G)		Overall Height(H)
Nominal Size or Basic Major Diameter of Thread				Max	Min	Max	Min	Max	Min
4	0.112	0.248	0.225	-	-	0.2	0.177
5	0.125	0.3125	0.302	0.361	0.344	0.26	0.24
6	0.138	0.3125	0.302	0.361	0.344	0.26	0.24
8	0.164	0.3125	0.302	0.361	0.344	0.26	0.24
10	0.19	0.375	0.362	0.433	0.413	0.291	0.271
43469	0.25	0.4375	0.423	0.505	0.482	0.338	0.318
43601	0.3125	0.562	0.545	0.65	0.621	0.385	0.365
43532	0.375	0.625	0.607	0.722	0.692	0.432	0.412
43662	0.4375	0.673	0.659	0.775	0.75	0.68	0.66
43467	0.5	0.75	0.736	0.866	0.84	0.572	0.552
43724	0.5625	0.875	0.861	1.01	0.982	0.482	0.462
43593	0.625	0.938	0.909	1.083	1.037	0.807	0.787
43528	0.75	1.12	1.08	-	-	1.12	1.08
43654	0.875	1.25	1.212	1.443	1.382	1.42	1.38
1	1	1.497	1.447	1.728	1.65	1.572	1.414