How to order parts made with Military or Aerospace Specs
When ordering O rings or other Parts to be used in Military or Aerospace applications you must specify the following items:
1. For O-rings you will need a 568-XXX # or and ID, OD and Cross Section, or specify a drawing number or dimensions of the actual parts which are going to be purchased.
2. Specify the compound number and material specification for the material that will be used in the actual part.
3. Specify any packaging requirements for the parts that are to be purchased.
4. Supply any conformance documentation that is required on the purchase order, such as test reports, Batch, Cure Requirements for the actual purchase order.
5. If you supply all this information at the time of quotation it will eliminate any extra costs or delivery issues which may arise if these requirements are not factored in with the original quotation, and assure all requirements will be supplied along with shipment of the actual purchase order.
The most widely used elastomers
The most widely used compounds in the rubber industry are as follows:
Nitrile, (Buna), Fluorocarbon (Viton), Ethylene Propylene (EPDM/EPR), Silicone, and Neoprene (Chloroprene)
Your application will determine which base material you will choose a compound from, this is the first thing you need to consider when choosing your rubber material.
Once you choose which material group you will need, other factors will determine which actual compound # should be chosen for your application from the material group as each rubber compound base has numerous materials compounds that are specifically blended from the base polymer to meet specific application requirements.
You should have all application information, i.e. specifications which may be required, fluid contact, temperature requirements etc…
A rubber distributor is your best source to help you in making the best choice, so you will get the best performance from your rubber parts.