High-Precision Flange Nut - 6g/6h Thread, 100% Anti-Loosening Tested Stainless/Carbon Steel, Third-Party Inspection Customizable for Industrial/Construction

• Customization: Available
• Material: Carbon Steel, Stainless Steel, Alloy Steel
• Type: Hexagon Head
• Model NO.: Flange Nut
• Connection: Common Bolt
• Head Style: Hexagonal
• Standard: DIN, ANSI, GB, JIS, BSW
• Grade: 4.8/8.8/10.9/12.9
• 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

Flange Nuts

Flange nuts feature a hexagonal body with an integrated circular flange at the base, eliminating the need for separate washers. This design expands the contact area, distributes clamping force evenly, and enhances anti-loosening performance in vibrating environments. Made of carbon steel (zinc-plated), stainless steel (304/316), or alloy steel, they come in grades like 4, 6, 8, and standards such as DIN 6923, ISO 4161. Sizes range from M5 to M30, with flange diameters 1.5–2× bolt diameter for optimal load distribution.

Applications include:

Automotive: Securing chassis parts and engine mounts (resists vibration).
Industrial Machinery: Fastening gearboxes and pumps in limited spaces.
Construction: Installing steel brackets and solar frames (stainless types for outdoors).
Marine/Chemical: Joining pipes in corrosive environments (corrosion-resistant materials).
Electronics: Fixing casings without surface damage.

Flange Nuts

Thread Spec-d		M5	M6	M8	M10	M12	(M14)	M16	M20
P	thread pitch	0.8	1	1.25	1.5	1.75	2	2	2.5
c	Min	1	1.1	1.2	1.5	1.8	2.1	2.4	3
da	Max	5.75	6.75	8.75	10.8	13	15.1	17.3	21.6
	Min	5	6	8	10	12	14	16	20
dc	Max	11.8	14.2	17.9	21.8	26	29.9	34.5	42.8
dw	Min	9.8	12.2	15.8	19.6	23.8	27.6	31.9	39.9
e	Min	8.79	11.05	14.38	16.64	20.03	23.36	26.75	32.95
m	Max	5	6	8	10	12	14	16	20
	Min	4.7	5.7	7.64	9.64	11.57	13.3	15.3	18.7
mw	Min	2.5	3.1	4.6	5.6	6.8	7.7	8.9	10.7
s	Max	8	10	13	15	18	21	24	30
	Min	7.78	9.78	12.73	14.73	17.73	20.67	23.67	29.16
r	Max	0.3	0.4	0.5	0.6	0.7	0.9	1	1.2

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).