Rubber Seals and O-Rings
AS568 O-Ring Series
The AS568 series is the American standard O-ring size range, and the complete set of moulds for it is held in stock, so standard AS568 parts are supplied promptly rather than tooled to order.
Product Overview
The AS568 series is the American standard O-ring size range, and the complete set of moulds for it is held in stock, so standard AS568 parts are supplied promptly rather than tooled to order. O-rings from the series are used across machine tools, agricultural machinery, instrumentation, construction machinery, automobiles, ships, aerospace equipment, engineering machinery, chemical machinery, mining machinery, plastic machinery and petroleum machinery.
Key benefits
Why Buyers Choose This Specification
Every Mould in the Series Held
Holding all AS568 moulds means any size in the standard is a production question rather than a tooling question. That is the difference between a two-week delivery and a two-month one.
A Standard Rather Than a Part Number
AS568 sizes are interchangeable between suppliers worldwide. Specifying to the standard removes the dependency on one vendor's catalogue.
Twelve Industries Covered
From machine tools to petroleum machinery, the same size range serves them all, which is exactly what a standard is for.
Material Choice Independent of Size
Because the size is standardised, the specification decision reduces to elastomer selection, which is where seal life is actually decided.
Application scenarios
Where It Is Used
- Machine tool hydraulic and pneumatic sealing
- Agricultural machinery sealing
- Instrumentation and measurement equipment
- Construction and engineering machinery
- Automobiles and ships
- Aerospace equipment
- Chemical, mining, plastic and petroleum machinery
Who it is for
The Buyers This Product Suits
Machinery Manufacturers
Designing to AS568 means the seal is available from multiple sources anywhere the machine is sold.
Maintenance and Spares Buyers
An AS568 number identifies the seal exactly, which removes measurement error from replacement ordering.
Export Equipment Builders
The standard is recognised internationally, so the end user can source replacements locally.
Problems it solves
What It Fixes
Long Lead Times on Tooled Seals
Holding all AS568 moulds means standard sizes are available promptly rather than waiting on tooling.
Replacement Seals That Cannot Be Identified
An AS568 size code identifies the seal without measurement.
Supplier Lock-In on Seal Supply
Specifying to the standard rather than to a proprietary part number keeps alternatives open.
Specifications
Published Figures For This Product
Every value below comes from our own product specification. Where a figure is not published we leave it out rather than estimating it.
| Standard | AS568 O-ring size series |
|---|---|
| Tooling | All moulds for the AS568 size range held |
| Availability | Standard parts supplied promptly |
| Variants | AS568 O-RING, AS568 O RING, AS568 ORING |
| Applications | Machine tools, agricultural, instrumentation, construction, automobiles, ships, aerospace, engineering, chemical, mining, plastic and petroleum machinery |
| Grade | Full standard size range |
Packing and documents
How It Ships And What Comes With It
Packing And Loading
Shipping volume for this item depends on the configuration and capacity you select, so no fixed container figure is published. Confirm the specification and the destination and a loading plan is issued with the quotation, rather than a figure we cannot support.
Documentation On File
- Rubber Seals and Plastics · Rubber Seals and O-Rings Specification Sheet20.5 KB
- Catalogue · Full Product Catalogue154.0 KB
Sourcing And Inspection
This product is supplied through TrueGlow Imaging, working with manufacturing partners whose facilities are visited and verified rather than taken on trust. In-process quality control and delivery supervision are available so goods are inspected before the container is sealed. Certifications quoted on this page are those stated on the product specification and belong to that product range rather than to our trading entity, so ask for the certificate covering your specific item.
Handling guide
Getting It Right First Time
Step 1
Identify the AS568 dash number from the existing seal or from your drawing.
Step 2
Select the elastomer separately, based on fluid and temperature.
Step 3
Check the groove dimensions match the AS568 recommendation for that size.
Step 4
Order a spare set at the same time, since standard sizes are inexpensive.
Step 5
Record the AS568 number in your maintenance system rather than a measured size.
Comparison
How It Compares In Our Range
Standard AS568 sizes against custom seals.
| AS568 Series | Standard American sizes with all moulds held, supplied promptly. Interchangeable internationally. |
|---|---|
| Custom O-Rings | Any size, but tooling is required unless the size happens to exist, which adds cost and lead time. |
FAQ
AS568 O-Ring Series Questions
What is AS568?
The American standard O-ring size series, covering a defined range of inside diameters and cross-sections.
Do you hold all the sizes?
All the moulds for the AS568 O-ring size range are held, which allows standard parts to be supplied promptly.
Which industries use AS568 O-rings?
Machine tools, agricultural machinery, instrumentation, construction machinery, automobiles, ships, aerospace equipment, engineering machinery, chemical machinery, mining machinery, plastic machinery and petroleum machinery.
Which material should we choose?
Size is set by AS568; material is chosen from the fluid and temperature. Send both and a material is recommended.
Can you make non-standard sizes?
Yes, custom sizes are quoted separately, though tooling may be required.
What quantities do you supply?
From maintenance quantities through to production volumes.
Related products
Other Products Buyers Look At
Industries
Sectors That Use This Product
Metal Fabrication and Machine Shops
Custom parts, tooling and the cranes that move them around the shop.
Warehousing and Heavy Industry
Lifting from 250 kg to 360 tons, indoors on a runway or outdoors on legs.
Food Packaging Lines
Depalletizing to palletizing, balanced against the filler in the middle.
Further reading
Guides That Cover This Product
Selecting an O-Ring Material NBR EPDM FKM or FFKM
Almost every seal failure is a material selection error rather than a dimensional one. The fluid and the temperature decide the elastomer, and the size is the easy part.
Quote AS568 O-Ring Series
Send the capacity or size you need, the quantity and the destination, and we will confirm the configuration, the lead time and a loading plan.