Stainless Steel Hexagon Nut 316/304/201 Screw Cap Nickel Plating M3 Thread DIN934 Certified Galvanized Finish Dome Nut Metric

• Customization: Available
• Material: Carbon Steel, Stainless Steel, Alloy Steel
• Type: Hexagon Head
• Model NO.: DIN1587
• Connection: Common Bolt
• Head Style: Hexagonal
• Standard: DIN, ANSI, GB, JIS, BSW
• Grade: 4,6,8,10,12
• Delivery: 5-10 Days in Stock, 10-30 Days Not in Stock
• Head Mark: Customized
• Thread Length: Lnternal Threads
• Size: M3-M100
• Transport Package: Plastic Bags+Cartons+Pallets
• Specification: as Request
• Trademark: LS or Customized
• Origin: Hebei, China
• HS Code: 731816
• Production Capacity: 50 Million Tons/Month
• Package Size: 24.40cm * 11.00cm * 6.00cm
• Package Gross Weight: 30.000kg

Product Description

PRODUCT PARAMETER

Cap Nut

Cap nuts (acorn nuts) feature a domed, closed top that covers bolt threads, combining protection, aesthetics, and safety. Their design shields exposed threads from corrosion, debris, and accidental contact, with a hexagonal base for wrench tightening. Made of carbon steel (zinc-plated), stainless steel (304/316), or brass, they follow standards like DIN 1587, with sizes matching bolts (M3–M36).

Applications:

Furniture: Hide bolt ends on chairs, tables, or beds for a polished look.
Medical Equipment: Cover fasteners on devices to prevent thread damage and ensure hygiene.
Outdoor Structures: Protect bolts in fences, railings, or playgrounds from weathering.
Automotive Interiors: Conceal exposed threads in dashboards or seat frames (aesthetic and safety).
Machinery Panels: Shield threads on visible components, preventing dust ingress and enhancing appearance.

Ideal for scenarios needing both functional thread protection and a clean, safe finish.

Threadspecification					M4	M5	M6	M8	M10
D
P		UNC			0.7	0.8	1	1.25	1.5
		Fine teeth 1			/	/	/	1	1.25
		Fine teeth 2			/	/	/	/	1
da		Max			4.6	5.75	6.75	8.75	10.8
		Min			4	5	6	8	10
dk		Max			6.5	7.5	9.5	12.5	15
dw		Min			5.9	6.9	8.9	11.6	14.6
e		A	Min		7.66	8.79	11.05	14.38	17.77
		B	Min		7.5	8.63	10.89	14.2	17.59
x		UNC	Max		1.4	1.6	2	2.5	3
		BSF	Max		/	/	/	2	2.5
G		UNC	Max		2.75	3	3.7	4.9	5.6
		BSF	Max		/	/	/	3.7	4.9
h		Maximum=nominal			8	10	12	15	18
		A	Min		7.64	9.64	11.57	14.57	17.57
		B	Min		7.42	9.42	11.3	14.3	17.3
m		Max			3.2	4	5	6.5	8
		Min			2.9	3.7	4.7	6.14	7.64
mw		Min			2.32	2.96	3.76	4.91	6.11
SR		≈			3.25	3.75	4.75	6.25	7.5
s		Maximum=nominal			7	8	10	13	16
		A	Min		6.78	7.78	9.78	12.73	15.73
		B	Min		6.64	7.64	9.64	12.57	15.57
t		Max			5.74	7.79	8.29	11.35	13.35
		Min			5.26	7.21	7.71	10.65	12.65
w		Min			2	2	2	2	2
kg		UNC			1.5	2.2	4.6	8.9	20.1
		BSF			/	/	/	11	20.1

ABOUT US

LONGSHI FASTENERS MANUFACTURING CO.,LTD.,

Longshi Fastener Manufacturing Co., Ltd., founded in 2008, is located in Shahe City, Hebei Province, close to the country's largestLarge fastener industrial cluster - Yongnian standard parts Industrial Park. The company headquarters covers an area of 21 thousand square meters, the annual output value of 200 million yuan, with more than 200 employees, with domestic More than 100 sets of advanced production equipment. It is a "manufacturing + service" type enterprise integrating fastener production, intelligent warehousing and e-commerce sales. The company's construction of the sea screw e-commerce park is located in Yongnian District, Handan City, Hebei Province, covers an area of 45 acres, the park planning and construction of office area, production area, packaging area, storage area, etc., to provide fastener production, packaging, warehousing, e-commerce sales and other services. Longshi mainly produces high quality and high strength fasteners, and "Longshi" screws have become a well-known brand in the industry. Longshi always adhere to quality first, reputation first. From raw material procurement, design and development, production and processing to products strict quality control is implemented in every link of quality testing and sales to win the recognition of our customers. The company has established standardized product testing laboratories and quality testing processes and standards to ensure that products strictly comply with national standards.

FAQ

Q1: What is your minimum order quantity (MOQ)? Do you charge extra for small orders?
100 pieces MOQ (most peers require 1,000+), no price premium for small orders. First-time customers for cross-border e-commerce/trade get free samples.
Q2:Do you support custom orders? How long does the customization process take?
Longshi Advantage: 8-dimensional customization (material, specification, surface treatment, etc.), with 3D design drawings + process plans.
Q3: What if an item is out of stock?
Stockout rate <0.1% (peers: 10+%), with real-time inventory monitoring. For extreme stockouts, free upgraded alternatives are provided (peers often leave clients waiting indefinitely).
Q4: Do you provide technical support, such as installation guidance or drawing optimization?
Dedicated 1v1 engineer team offering free technical support.
Q5:Can I visit your factory or arrange a factory audit?
Support online factory tours (real-time video of production lines/laboratories) and offline visits (pick-up service available).