Stainless Steel Domed Nut Acorn Nut DIN 1587

Specially designed for concealed protection and decorative fastening scenarios, Wanluo’s China Stainless Steel Domed Nut Acorn Nut DIN 1587 (also known as acorn nuts) are manufactured in full compliance with DIN 1587 international standards.

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Product Description

Different from open-type ordinary nuts, this Stainless Steel Domed Nut Acorn Nut DIN 1587 by Wanluo supplier unique closed dome structure perfectly covers exposed bolt threads, solving common industrial problems such as thread rusting, dust accumulation, foreign matter entanglement and personnel scratch hazards. It integrates locking, sealing protection and aesthetic decoration in one piece, serving as a specialized protective fastener for exposed connection positions of equipment and facilities.

Sealing Performance & Aesthetic Advantages

This Stainless Steel Domed Nut Acorn Nut DIN 1587 adopts integral one-piece stamping and precision tapping forming with no splicing gaps. The smooth semicircular dome top completely wraps the protruding bolt rod and thread part, effectively isolating external moisture, dust, rain and corrosive media to avoid thread oxidation rust and thread tooth abrasion. The smooth rounded arc surface eliminates sharp corners, preventing scratch injuries during manual operation and equipment maintenance. Made of high-purity stainless steel raw materials, the product maintains smooth metallic texture and long-term anti-corrosion performance, achieving dual effects of structural safety protection and neat appearance for long-term exposed installation environments.

Product Parameter

Parameter Item	Detailed Specification
Product Name	Stainless Steel Domed Nut, DIN 1587 Acorn Nut
Executive Standard	DIN 1587, ISO Standard, GB Standard, Custom Non-standard Sizes
Available Material	In Stock: 304, 316, 316L; Customizable: 2205, 2507 Duplex Steel
Size Range	M3-M30 complete metric specifications, custom dome height and thread depth
Structural Feature	Closed semicircular dome + hexagonal base, integrated protective structure
Surface Treatment	Pickling & passivation, mirror smooth surface, no burrs and uniform gloss
Mechanical Properties	Stable locking force, good structural toughness, not easy to deform after long-term fastening
Packaging Method	Dustproof independent packaging + export carton, pallet packing for bulk orders
Supply Service	Spot wholesale, personalized non-standard customization, mixed fastener one-stop supply

Stainless Steel Domed Nut Acorn Nut Din 1587

Thread Size D			M4	M5	M6	M8	M10	M12	(M14)	M16	(M18)	M20	(M22)	M24
P	Coarse thread		0.7	0.8	1	1.25	1.5	1.75	2	2	2.5	2.5	2.5	3
	Fine thread -1		/	/	/	1	1.25	1.5	1.5	1.5	2	2	2	2
	Fine thread -2		/	/	/	/	1	1.25	/	/	1.5	1.5	1.5	/
d_a	max		4.6	5.75	6.75	8.75	10.8	13	15.1	17.3	19.5	21.6	23.7	25.9
d_a	min		4	5	6	8	10	12	14	16	18	20	22	24
d_k	min=nominal size		6.5	7.5	9.5	12.5	15	17	20	23	26	28	33	34
d_w	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	Grade A	min	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	Grade B	min	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	Coarse thread	max	1.4	1.6	2	2.5	3	3.5	4	4	5	5	5	6
x	Fine thread	max	/	/	/	2	2.5	3	3	3	4	4	4	4
G	Coarse thread	max	2.75	3	3.7	4.9	5.6	6.4	7.3	7.3	9.3	9.3	9.3	10.7
G	Fine thread	max	/	/	/	3.7	4.9	5.6	5.6	5.6	7.3	7.3	7.3	7.3
h	max=nominal size		8	10	12	15	18	22	25	28	32	34	39	42
	Grade A	min	7.64	9.64	11.57	14.57	17.57	21.48	24.48	27.48	31.38	33.38	38.38	41.38
	Grade B	min	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	8	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
m_w	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
SR	≈		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
	Grade A	min (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
	Grade B	min (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	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
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
w	min		2	2	2	2	2	3	4	4	5	5	5	6
per 1000units≈kg	Coarse thread		1.5	2.2	4.6	8.9	20.1	28.3	39.7	54.3	79.1	104	/	216
per 1000units≈kg	Fine thread		/	/	/	11	20.1	28.3	39.7	54.3	95	104	/	216

Protective Functions & Application Scenarios

1. Stainless Steel Domed Nut Acorn Nut DIN 1587 is fully closed dome shielding structure completely covers exposed bolt threads, effectively blocking dust, water vapor and corrosive substances, greatly extending the service life of thread connections.

2. Round and smooth arc design eliminates sharp thread protrusions, avoiding scratch accidents during personnel operation and equipment handling, improving overall operation safety factor.

3. Integrated molding process ensures tight thread matching and stable locking performance. It will not loosen or fall off due to external impact and slight vibration, balancing protection and fastening stability.

4. High-grade stainless steel material delivers excellent weather resistance and anti-corrosion ability, suitable for outdoor guardrails, municipal facilities, vehicle equipment and long-term exposed structural connections.

5. Neat and uniform appearance provides decorative optimization for equipment connection parts, widely used in architectural decoration, fitness equipment, sanitary ware and aesthetic-oriented assembly scenarios.

Stainless Steel Domed Nut Acorn Nut Din 1587

FAQ

Q1: What is the core function of Stainless Steel Domed Nut Acorn Nut DIN 1587 compared with ordinary nuts?

A1: Ordinary nuts only provide locking and fastening functions, while domed acorn nuts add closed protection and aesthetic decoration. They can shield exposed threads from corrosion and dust, while avoiding scratch risks, ideal for exposed installation positions.

Q2: Are domed nuts suitable for long-term outdoor use?

A2: Yes. The closed shielding structure isolates rain and fog erosion, and the stainless steel body is resistant to rust and oxidation. It is the preferred protective fastener for outdoor facilities, municipal engineering and landscape equipment.

Q3: Can you customize deep dome and extra height acorn nuts?

A3: Sure. We support customized dome height, nut body length and internal thread depth, which can match ultra-long bolt protrusion and special hidden protection requirements.

Q4: Will the closed dome affect bolt locking assembly?

A4: We reserve standard thread depth and dome inner space according to national standards. It does not interfere with bolt assembly and locking, ensuring both full fastening and complete covering protection.

Q5: What industries are domed nuts mainly used in?

A5: They are widely applied in municipal guardrails, traffic facilities, fitness equipment, sanitary ware accessories, architectural decoration, mechanical equipment exterior connection and other scenarios requiring protection and beautiful appearance.

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