AS# 004-
475

AS568 -004 through -475 Static Crush Seal Design Guidelines
AS568 DASH #	Nominal Cross Section	O-Ring Cross Section		Gt / Ht	R Radius	R1 Max Radius
AS568 DASH #	Nominal Cross Section	In.	+/-	In	In.	In.
-004 to -050	1/16	0.070	0.003	0.092 / 0.095	0.005 / 0.010	0.020
-102 to -178	3/32	0.103	0.003	0.134 / 0.137	0.005 / 0.010	0.025
-201 to -284	1/8	0.139	0.004	0.182 / 0.185	0.005 / 0.010	0.030
-309 to -395	3/16	0.210	0.005	0.269 / 0.273	0.005 / 0.015	0.040
-425 to -475	1/4	0.275	0.006	0.356 / 0.360	0.005 / 0.015	0.050

Static Crush O-Ring Gland Design

In crush seal applications the o-ring is squeezed at an angle relative to its cross section. In these applications the o-ring is completely confined and pressure deformed within a 45º triangular gland, as depicted. The table below lists recommended dimensions for static crush seal glands by AS-568A o-ring dash numbers.

Static Radial Glands

Axial Internal Pressure

Axial External Pressure

Dynamic Rotary Glands

Dynamic Reciprocating

Static Crush Glands

Dovetail Glands

Gland Design Home

Static Crush Gland Design

In crush seal applications the o-ring is squeezed at an angle relative to its cross section. In these applications the o-ring is completely confined and pressure deformed within a 45º triangular gland, as depicted. The table below lists recommended dimensions for static crush seal glands by AS-568A o-ring dash numbers. There are a number of factors that should be carefully considered when designing the gland for a static crush o-ring application. The table below provides a standard set of guidelines to assist you in your design.

- The elastomer selection should directly correlate with the type of application in which the o-ring seal will be used. You can review our materials/elastomer section to examine the primary qualities of the material type under consideration.

Due to the number of interacting forces, it is STRONGLY RECOMMENDED THAT YOUR ELASTOMER SELECTION BE RIGOROUSLY TESTED IN THE ACTUAL APPLICATION, performance assumptions must be checked so that you are certain that all variables have been carefully considered.

Dynamic Radial Glands