|
O-rings
are amazingly simple devices. Shouldn’t
ordering them be just as simple? We’ve
made ordering O-rings as easy as specifying two
characteristics: the size of
the seal, and the seal material (or compound).
Here’s how it works:
SIZE
Standard imperial (inch) sizes are specified using
the three-digit “dash
numbers” defined in Aerospace Standard
(AS) 568A (See O-Ring
Size Tables). Published by the Society
of Automotive Engineers (SAE), AS
568A supersedes and cancels both AS 568 and
Aerospace Recommended Practice (ARP) 568. When
ordering standard sizes, all you need to specify
is an AS 568A dash number (for example, AS 568A-011).
Or, if you prefer, simply request an OR-011 seal.
The “OR” is our designation for an
O-ring.
For non-standard imperial
sizes, please specify both the inside diameter
(ID) and cross-section (W)
(See Figure 147) in the
following format: OR-ID x W. For example, OR-1.250
x .125 for a seal with a 1.250" ID and a .125" W.
For metric sizes,
please specify using the following format: OR-IDmm
x Wmm. For example, OR-25mm x 3mm.
COMPOUND
Compound information includes both the base polymer and
the hardness.
You may specify these in any of three ways:
1)
Simply identify the compound using either its full
name or its ASTM D
1418 designation (for example, nitrile or NBR)
and the desired hardness (for example, 70 Shore
A). NBR-70 is a 70 (Shore A) durometer nitrile.
2)
Give us a compound number (if known) which notes
both polymer and hardness. For example, N470 is
a standard 70 (Shore A) durometer nitrile.
3)
Provide an ASTM
D 2000 / SAE J200 line call-out for the
compound.
Other
than the quantity you want, that’s all we
need!
Questions?
Please feel free to call us at 1-800-722-6766
for more information.
|
