590 Back-Up Ring

Style 590 Back-up Rings feature exceptional strength and abrasion resistance along with a 53 Shore D hardness rating which makes them suitable for high pressure service where extrusion is a problem. Primarily used as a u-seal back-up,these rings can be used with o-rings. They also retrofit urethane and PTFE back-up rings, with greater performance characteristics. “S” suffix designates a split ring.

SEAL INFORMATION
MATERIAL	HIGH PERFORMANCE URETHANE
TEMPERATURE RANGE	-40° TO +275° F
PRESSURE RANGE	VARIES ACCORD ING TO DIAMETRAL CLEARANCE

Part Number	A Nom. ID	B Nom. OD	C Nom. Ht
1/8″ C/S
590-15 590-17 590-19S 590-214 590-227 590-228 590-237 590-239	1/2 5/8 3/4 1 2-1/8 2-1/4 3-3/8 3-5/8	3/4 7/8 1 1-1/4 2-3/8 2-1/2 3-5/8 3-7/8	1/16 1/16 1/16 1/16 1/16 1/16 1/16 1/16
5/32″ C/S
590-32 590-34S 590-36	1 1-3/16 1-3/8	1-5/16 1-1/2 1-11/16	1/16 1/16 1/16
3/16″ C/S
590-324 590-325 590-45 590-45S 590-46 590-48 590-49 590-49S 590-338 590-341 590-345 590-346 590-347 590-349 590-352 590-354 590-358	1-3/8 1-1/2 1-5/8 1-5/8 1-3/4 2 2-1/8 2-1/8 3-1/8 3-1/2 4 4-1/8 4-1/4 4-1/2 4-7/8 5-1/8 5-5/8	1-3/4 1-7/8 2 2 2-1/8 2-3/8 2-1/2 2-1/2 3-1/2 3-7/8 4-3/8 4-1/2 4-5/8 4-7/8 5-1/4 5-1/2 6	1/16 1/16 1/16 1/16 1/16 1/16 1/16 1/16 1/16 1/16 1/16 1/16 1/16 1/16 1/16 1/16 1/16
7/32″ C/S
590-54 590-57 590-57S 590-58	2-1/2 2-13/16 2-13/16 3	2-15/16 3-1/4 3-1/4 3-7/16	1/16 1/16 1/16 1/16
1/4″ C/S
590-66 590-66S 590-68 590-70 590-70S	3-1/2 3-1/2 4 4-1/2 4-1/2	4 4 4-1/2 5 5	1/16 1/16 1/16 1/16 1/16
9/32″ C/S
590-73S 590-75 590-5.43X6S 590-6.43X7S	4-7/16 5 5-7/16 6-7/16	5 5-9/16 6 7	1/16 1/16 1/16 1/16
5/16″ C/S
590-79 590-79S 590-5.5X6.12 590-83 590-83S 590-84 590-84S	5-3/8 5-3/8 5-1/2 6-3/8 6-3/8 7-3/8 7-3/8	6 6 6-1/8 7 7 8 8	1/16 1/16 1/16 1/16 1/16 1/16 1/16
11/32″ C/S
590-85S	9-5/16	10	1/16
3/8″ C/S
590-86S	11-1/4	12	1/16
13/32″ C/S
590-13.18X14S	13-3/16	14	1/16
1/2″ C/S
590-11X12S 590-87S	11 13	12 14	1/16 1/16

HERCULES 590 BACK-UP RING

590 Back-Up Ring