Standard Size AS568 Rubber O-Rings with 40~90 Shore A Hardness for Industrial Sealing

AS568 NBR O-Rings for Standard-Size Industrial Seal Replacement

Select these NBR O-rings by AS568 dash number or metric dimensions together with the compound and gland requirements. Standard size identifies geometry; sealing performance depends on the fluid, temperature, pressure and joint design.

Product Specifications

Item	Value
Size	AS568
Place of Origin	China
Brand Name	SHQN
Model Number	AS568
Material Type	NBR
Hardness	Selected Shore A hardness and tolerance by NBR compound and gland
MOQ	10000pcs
Delivery Time	7-15 Days
Supply Ability	3,000,000 Pieces per Month
Available Sizes	AS568 dash number or custom ID and cross-section by drawing
Port	Shanghai Port
Primary Application	Oil and gas industry

Key Features

Oil Resistance

Specify the oil or fuel formulation, additives and service temperature for NBR compound compatibility review.

Precision Manufacturing

Produced using high-specification grinding and compression molding machines for consistent quality and dimensional accuracy.

Custom Colors

Available in standard black or custom colors to meet your specific identification requirements.

Storage & Handling Guidelines

• Store away from direct sunlight, damp, and well-ventilated areas (ideal temperature: 0-20°C)
• Maintain at least 1m distance from heating equipment
• Keep separate from acid or alkali substances
• Avoid compression during storage to prevent permanent deformation
• Clearly label all storage containers with manufacturing and factory dates

About SHQN

Shanghai Qinuo Industry specializes in high-quality rubber products manufacturing with advanced production equipment, professional technical personnel, and a complete quality assurance system.

Production Capabilities:

• Multiple 150T/200T/300T vacuum vulcanizing machines
• Capacity of 2500 molds per day
• Vacuum pressurization technology to minimize defects
• Full OEM/ODM services available

Product Lines

Standard Components:

• Oil & gas industry seals (Hammer Union Seals, Pipe Wipers, U-Cups)
• Industrial rubber components (door stoppers, chair leg caps)
• PTFE and Peek components

Custom Solutions:

We can manufacture rubber products to exact specifications from your drawings or samples.

Frequently Asked Questions

Can I get samples?

Yes, 3-10 samples or 1 pack are available for free (customer pays shipping). We can also use your courier account for sample shipment.

What is the pricing?

For bulk orders, please place directly. For custom packaging or labeling, contact our sales team for pricing.

Can you print my logo?

Yes, we offer complete custom branding services for both products and packaging.

What shipping options are available?

We can arrange express, air, or sea shipping based on your requirements, including direct shipment to Amazon warehouses.

What are the payment terms?

We accept Paypal, Western Union, TT, credit card, and agreed order payment method.

What is the production lead time?

Stock items: typically within 15 days. Custom production: 12-15 days depending on quantity and packaging requirements.

Standard NBR O-Ring Replacement: Dash Number and Gland Check

Provide the AS568 dash number or measured inner diameter and cross-section with units. Verify dimensions against the drawing or groove because a used ring may be swollen, stretched or compressed. Include dimensional tolerances when ordering a custom size.

Specify the NBR compound and one nominal Shore A hardness with tolerance. Record maximum pressure, temperature, clearance under load and static or moving duty. Confirm whether the gland includes backup rings; ring size alone does not define the complete assembly pressure capability.

Identify exposure to oils, fuels, additives and cleaning chemicals before approving the replacement. For alternative polymers, coated rings or encapsulated rings, review the construction and compatibility separately. Keep part number, size, compound, hardness and batch identification on packaging for maintenance stock.