Stainless Steel 304 316 A2 A4 Inox DIN125 Flat Washer Fasteners

• Customization: Available
• Type: Flat Gasket
• Material: Carbon Steel, Stainless Steel, Alloy Steel
• Model NO.: DIN 125 / ISO 7089 / ASTM F436
• Combination Washer Structure: as Your Request
• Combination Washer Packaging: as Your Request
• Spring Washer Type: Standard
• Delivery: 5-10 Days in Stock, 10-30 Days Not in Stock
• Size: M3-M100
• Thickness: 0.5mm / 1mm / 2mm / 3mm / Custom
• Outer Diameter (Od): 10mm / 15mm / 20mm / 25mm / Custom
• Inner Diameter (ID): 5mm / 8mm / 10mm / 12mm / Custom
• Surface Finish: Zinc Plated / Black Oxide / Passivated / Galvanize
• Application: Electrical Equipment / Automotive / Industrial / C
• Certification: ISO 9001 / RoHS Certification / CE Marking
• Hardness Level: Hv140 / Hv200 / Hv300 / Custom Hardened
• Load Distribution: Increased Bearing Area / Reduced Surface Damage
• Corrosion Resistance: Indoor / Outdoor / Salt Spray Tested
• Hardness Test / Thickness Inspection / S: Hardness Test / Thickness Inspection / Surface COA
• Transport Package: Plastic Bags+Cartons+Pallets
• Specification: as Request
• Trademark: LS or Customized
• Origin: Hebei, China
• HS Code: 731822
• Production Capacity: 50 Million Tons/Month
• Package Size: 24.40cm * 11.00cm * 6.00cm
• Package Gross Weight: 30.000kg

Product Description

PRODUCT PARAMETER

Flat Washer

Flat washers are thin, circular discs placed under screw/nut heads to distribute clamping force, protect surfaces from damage, and prevent loosening due to friction. They follow standards like DIN 125 (most common) and ISO 7089, with materials ranging from zinc-plated carbon steel (general use) to stainless steel (corrosion resistance) or plastics (e.g., PA66, PTFE for electrical insulation or chemical environments).

Key Roles:

Load Distribution: Spread force evenly across soft/porous materials (e.g., wood, plastic) to avoid cracking.
Surface Protection: Prevent scratches from screw heads during tightening.
Friction Reduction: Minimize wear between fasteners and mating parts.

Applications:

Automotive: Secure body panels, chassis components, or engine parts.
Construction: Distribute loads in steel beams, bridge joints, or concrete anchors.
Electronics: Insulate circuit boards or mount components (plastic washers for electrical safety).
Industrial Machinery: Maintain alignment in pumps, motors, or gearboxes.

Available in various thicknesses and outer diameters, they balance functionality and cost, making them essential in nearly all mechanical assemblies.

Thread Spec			Φ1.6	Φ2	Φ2.5	Φ3	Φ4	Φ5	Φ6
d	Minimum value = nominal value		1.7	2.2	2.7	3.2	4.3	5.3	6.4
	Max		1.84	2.34	2.84	3.38	4.48	5.48	6.62
dc	Maximum value = nominal value		4	5	6	7	9	10	12
	Min		3.7	4.7	5.7	6.64	8.64	9.64	11.57
h	Nominal		0.3	0.3	0.5	0.5	0.8	1	1.6
	Max		0.35	0.35	0.55	0.55	0.9	1.1	1.8
	Min		0.25	0.25	0.45	0.45	0.7	0.9	1.4
Weight per thousand pieces (steel)≈kg			0.024	0.037	0.088	0.119	0.308	0.443	1.02

Thread Spec			(Φ22)	Φ24	(Φ27)	Φ30	(Φ33)	Φ36	(Φ39)
d	Minimum value = nominal value		23	25	28	31	34	37	42
	Maximum value = nominal value		23.33	25.33	28.33	31.39	34.62	37.62	42.62
dc	Maximum value = nominal value		39	44	50	56	60	66	72
	Min		38.38	43.38	49.38	55.26	58.8	64.8	70.8
h	Nominal		3	4	4	4	5	5	6
	Max		3.3	4.3	4.3	4.3	5.6	5.6	6.6
	Min		2.7	3.7	3.7	3.7	4.4	4.4	5.4
Weight per thousand pieces (steel)≈kg			18.35	32.33	42.32	53.64	75.34	92.07	126.5

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).