Product Group

O-ring back-up ring

632 different sizes · ID 2.8 – 440 mm

Number of sizes

632

Inner diameter range

2.8 – 440 mm

Material

PTFE

The table below lists the sizes in this group. If you know the size you need, search within a tolerance in the size finder and request a quote directly from the results.

Size table

Dimensions are in millimetres.

Inner diameter	Outer diameter	Height	Material	Product name
2.8	6	1.7	PTFE	002.8X006X1.70 O-RING PTFE BACK-UP
4	7	1.25	PTFE	004X007X1.25 O-RING PTFE BACK-UP
5	8	1.25	PTFE	005X008X1.25 O-RING PTFE BACK-UP
6	10	1	PTFE	006X010X1.00 O-RING PTFE BACK-UP
6	9	1.25	PTFE	006X009X1.25 O-RING PTFE BACK-UP
6.7	10.1	1.1	PTFE	006.7X010.1X1.10 O-RING PTFE BACK-UP
7	10	1.25	PTFE	007X010X1.25 O-RING PTFE BACK-UP
7.5	11	1	PTFE	007.5X011X1.00 O-RING PTFE BACK-UP
7.6	10	1.25	PTFE	007.6X010X1.25 O-RING PTFE BACK-UP
8	10	1.25	PTFE	008X010X1.25 O-RING PTFE BACK-UP
8	11	1.25	PTFE	008X011X1.25 O-RING PTFE BACK-UP
8.5	11.1	1.05	PTFE	008.5X011.1X1.05 O-RING PTFE BACK-UP
9	12	1	PTFE	009X012X1.00 O-RING PTFE BACK-UP
9	12	1.25	PTFE	009X012X1.25 O-RING PTFE BACK-UP
10	13	1.25	PTFE	010X013X1.25 O-RING PTFE BACK-UP
10	14	1.25	PTFE	010X014X1.25 O-RING PTFE BACK-UP
11	13	0.9	PTFE	011X013X0.90 O-RING PTFE BACK-UP
11	14	0.9	PTFE	011X014X0.90 O-RING PTFE BACK-UP
11	14	1.25	PTFE	011X014X1.25 O-RING PTFE BACK-UP
11	15	1.25	PTFE	011X015X1.25 O-RING PTFE BACK-UP
11	15	1.5	PTFE	011X015X1.50 O-RING PTFE BACK-UP
11	15	2.2	PTFE	011X015X2.20 O-RING PTFE BACK-UP
11.5	15	1.25	PTFE	011.5X015X1.25 O-RING PTFE BACK-UP
12	15	1.25	PTFE	012X015X1.25 O-RING PTFE BACK-UP
12	16	1.25	PTFE	012X016X1.25 O-RING PTFE BACK-UP
12	15	2	PTFE	012X015X2.00 O-RING PTFE BACK-UP
13	16	1.25	PTFE	013X016X1.25 O-RING PTFE BACK-UP
13	17	1.25	PTFE	013X017X1.25 O-RING PTFE BACK-UP
14	18	1.25	PTFE	014X018X1.25 O-RING PTFE BACK-UP
14	19	1.25	PTFE	014X019X1.25 O-RING PTFE BACK-UP
14.4	17.4	1.25	PTFE	014.4X017.4X1.25 O-RING PTFE BACK-UP
14.7	16.3	1.25	PTFE	014.70X016.30X1.25 O-RING PTFE BACK-UP
15	18	1.25	PTFE	015X018X1.25 O-RING PTFE BACK-UP
15	19	1.25	PTFE	015X019X1.25 O-RING PTFE BACK-UP
15	18	1.6	PTFE	015X18X1.60 O-RING PTFE BACK-UP
15.8	12.8	1.25	PTFE	015.8X012.8X1.25 O-RING PTFE BACK-UP
16	18	1.25	PTFE	016X018X1.25 O-RING PTFE BACK-UP
16	18.6	1.25	PTFE	016X018.6X1.25 O-RING PTFE BACK-UP
16	19	1.25	PTFE	016X019X1.25 O-RING PTFE BACK-UP
16	20	1.25	PTFE	016X020X1.25 O-RING PTFE BACK-UP
16	21	1.25	PTFE	016X021X1.25 O-RING PTFE BACK-UP
16	22	1.25	PTFE	016X022X1.25 O-RING PTFE BACK-UP
16.6	18.3	3.17	PTFE	016.6X018.3X3.17 O-RING PTFE BACK-UP
17	19	1.25	PTFE	017X019X1.25 O-RING PTFE BACK-UP
17	20	1.25	PTFE	017X020X1.25 O-RING PTFE BACK-UP
17	21	1.25	PTFE	017X021X1.25 O-RING PTFE BACK-UP
17	22	1.25	PTFE	017X022X1.25 O-RING PTFE BACK-UP
18	21	1.25	PTFE	018X021X1.25 O-RING PTFE BACK-UP
18	22	1.25	PTFE	018X022X1.25 O-RING PTFE BACK-UP
18	23.3	1.25	PTFE	018X023.3X1.25 O-RING PTFE BACK-UP
18	24	1.25	PTFE	018X024X1.25 O-RING PTFE BACK-UP
18.5	21	1.25	PTFE	018.5X021X1.25 O-RING PTFE BACK-UP
19	21	1.25	PTFE	019X021X1.25 O-RING PTFE BACK-UP
19	22	1.25	PTFE	019X022X1.25 O-RING PTFE BACK-UP
19	23	1.25	PTFE	019X023X1.25 O-RING PTFE BACK-UP
19	24	1.25	PTFE	019X024X1.25 O-RING PTFE BACK-UP
19.5	21.5	1.25	PTFE	019.5X021.5X1.25 O-RING PTFE BACK-UP
19.6	24	1.1	PTFE	019.6X024X1.10 O-RING PTFE BACK-UP
20	24	1	PTFE	020X024X1.00 O-RING PTFE BACK-UP
20	25	1	PTFE	020X025X1.00 O-RING PTFE BACK-UP
20	24	1.25	PTFE	020X024X1.25 O-RING PTFE BACK-UP
20	25	1.25	PTFE	020X025X1.25 O-RING PTFE BACK-UP
20	26	1.25	PTFE	020X026X1.25 O-RING PTFE BACK-UP
20	29	2.5	PTFE	020X029X2.50 O-RING PTFE BACK-UP
21	25	1.25	PTFE	021X025X1.25 O-RING PTFE BACK-UP
21	25.5	1.25	PTFE	021X025.5X1.25 O-RING PTFE BACK-UP
21	26	1.25	PTFE	021X026X1.25 O-RING PTFE BACK-UP
21	27	1.25	PTFE	021X027X1.25 O-RING PTFE BACK-UP
22	25	1.25	PTFE	022X025X1.25 O-RING PTFE BACK-UP
22	26	1.25	PTFE	022X026X1.25 O-RING PTFE BACK-UP
22	27	1.25	PTFE	022X027X1.25 O-RING PTFE BACK-UP
22	28	1.25	PTFE	022X028X1.25 O-RING PTFE BACK-UP
22	28	1.5	PTFE	022X028X1.50 O-RING PTFE BACK-UP
22.2	17.05	2.55	PTFE	022.2X017.05X2.55 O-RING PTFE BACK-UP
22.6	28	1	PTFE	022.60X028X1.00 O-RING PTFE BACK-UP
23	29	1.25	PTFE	023X029X1.25 O-RING PTFE BACK-UP
24	28	1.25	PTFE	024X028X1.25 O-RING PTFE BACK-UP
24	29	1.25	PTFE	024X029X1.25 O-RING PTFE BACK-UP
24	30	1.25	PTFE	024X030X1.25 O-RING PTFE BACK-UP
24	28	1.5	PTFE	024X028X1.50 O-RING PTFE BACK-UP
24	26	2	PTFE	024X026X2.00 O-RING PTFE BACK-UP
25	30	1	PTFE	025X030X1.00 O-RING PTFE BACK-UP
25	28	1.25	PTFE	025X028X1.25 O-RING PTFE BACK-UP
25	29	1.25	PTFE	025X029X1.25 O-RING PTFE BACK-UP
25	30	1.25	—	025X30X1.25 O-RING PU YELLOW BACK-UP
25	30	1.25	PTFE	025X030X1.25 O-RING PTFE BACK-UP
25	31	1.25	PTFE	025X031X1.25 O-RING PTFE BACK-UP
25	30	1.5	PTFE	025X030X1.50 O-RING PTFE BACK-UP
26	30	1.25	PTFE	026X030X1.25 O-RING PTFE BACK-UP
26	32	1.25	PTFE	026X032X1.25 O-RING PTFE BACK-UP
27	31.2	1	PTFE	027X031.2X1.00 O-RING PTFE BACK-UP
27	32	1.25	PTFE	027X032X1.25 O-RING PTFE BACK-UP
27	33	2	—	027X033X2.00 O-RING SPIRAL BACK-UP
28	32	1.25	PTFE	028X032X1.25 O-RING PTFE BACK-UP
28	33	1.25	PTFE	028X033X1.25 O-RING PTFE BACK-UP
28	34	1.25	PTFE	028X034X1.25 O-RING PTFE BACK-UP
29	30	1.25	PTFE	029X030X1.25 O-RING PTFE BACK-UP
29	34	1.25	PTFE	029X034X1.25 O-RING PTFE BACK-UP
29	35	1.25	PTFE	029X035X1.25 O-RING PTFE BACK-UP
29	31.4	1.4	PTFE	029X031.4X1.40 O-RING PTFE BACK-UP
30	34	1	PTFE	030X034X1.00 O-RING PTFE BACK-UP
30	34	1.25	PTFE	030X034X1.25 O-RING PTFE BACK-UP
30	35	1.25	PTFE	030X035X1.25 O-RING PTFE BACK-UP
30	36	1.25	PTFE	030X036X1.25 O-RING PTFE BACK-UP
30	40	1.9	PTFE	030X040X1.90 O-RING PTFE BACK-UP
31	33	1.25	PTFE	031X033X1.25 O-RING PTFE BACK-UP
31	37	1.25	PTFE	031X037X1.25 O-RING PTFE BACK-UP
32	36	1.25	PTFE	032X036X1.25 O-RING PTFE BACK-UP
32	37	1.25	PTFE	032X037X1.25 O-RING PTFE BACK-UP
32	38	1.25	PTFE	032X038X1.25 O-RING PTFE BACK-UP
33	35	1.25	PTFE	033X035X1.25 O-RING PTFE BACK-UP
33	39	1.25	PTFE	033X039X1.25 O-RING PTFE BACK-UP
34	38.1	1	PTFE	034X38.1X1.00 O-RING PTFE BACK-UP
34	38	1.25	PTFE	034X038X1.25 O-RING PTFE BACK-UP
34	39	1.25	—	034X039X1.25 SPIRAL BACK-UP RING
34	40	1.25	PTFE	034X040X1.25 O-RING PTFE BACK-UP
35	37	1.25	PTFE	035X037X1.25 O-RING PTFE BACK-UP
35	39	1.25	PTFE	035X039X1.25 O-RING PTFE BACK-UP
35	40	1.25	PTFE	035X040X1.25 O-RING PTFE BACK-UP
35	41	1.25	PTFE	035X041X1.25 O-RING PTFE BACK-UP
35	40	1.5	PTFE	035X040X1.50 O-RING PTFE BACK-UP
35	40	1.9	PTFE	035X040X1.90 O-RING PTFE BACK-UP
35	45	1.9	PTFE	035X045X1.90 O-RING PTFE BACK-UP
35	43	4.4	PTFE	035X043X4.4 O-RING PTFE BACK-UP
36	40	1.25	PTFE	036X040X1.25 O-RING PTFE BACK-UP
36	42	1.25	PTFE	036X042X1.25 O-RING PTFE BACK-UP
36	44	1.5	PTFE	036X044X1.5 O-RING PTFE BACK-UP
36.4	39	3	PTFE	36.40X039X3.00 O-RING PTFE BACK-UP
36.5	39.5	1.25	PTFE	036.5X039.5X1.25 O-RING PTFE BACK-UP
37	39	1.25	PTFE	037X039X1.25 O-RING PTFE BACK-UP
37	40	1.25	PTFE	037X040X1.25 O-RING PTFE BACK-UP
37	41	1.25	PTFE	037X041X1.25 O-RING PTFE BACK-UP
37	42	1.25	PTFE	037X042X1.25 O-RING PTFE BACK-UP
37	43	1.25	PTFE	037X043X1.25 O-RING PTFE BACK-UP
38	41	1.25	PTFE	038X041X1.25 O-RING PTFE BACK-UP
38	42	1.25	PTFE	038X042X1.25 O-RING PTFE BACK-UP
38	44	1.25	PTFE	038X044X1.25 O-RING PTFE BACK-UP
38	47.5	1.9	PTFE	038X047.5X1.90 O-RING PTFE BACK-UP
38.2	44.2	1.25	PTFE	38.20X44.20X1.25(4J9222) O-RING PTFE BACK-UP
38.8	43	1.6	PTFE	038.8X043X1.60 O-RING PTFE BACK-UP
39	43	1.25	—	039X043X1.25 O-RING DELRIN BACK-UP
39	45	1.25	PTFE	039X045X1.25 O-RING PTFE BACK-UP
39	41.8	1.95	PTFE	039X041.8X1.95 O-RING PTFE BACK-UP
40	50	1	PTFE	040X050X1.00 O-RING PTFE BACK-UP
40	44	1.25	PTFE	040X044X1.25 O-RING PTFE BACK-UP
40	45	1.25	PTFE	040X045X1.25 O-RING PTFE BACK-UP
40	46	1.25	PTFE	040X046X1.25 O-RING PTFE BACK-UP
40	45	1.5	PTFE	040X045X1.50 O-RING PTFE BACK-UP
40	50	1.9	PTFE	040X050X1.90 O-RING PTFE BACK-UP
41	47	1.25	PTFE	041X047X1.25 O-RING PTFE BACK-UP
41.5	53	7.4	PTFE	041.5X53X7.4 O-RING PTFE BACK-UP
42	45	1	PTFE	042X045X1.00 O-RING PTFE BACK-UP
42	46	1.25	PTFE	042X046X1.25 O-RING PTFE BACK-UP
42	47	1.25	PTFE	042X047X1.25 O-RING PTFE BACK-UP
42	48	1.25	PTFE	042X048X1.25 O-RING PTFE BACK-UP
42	52	1.5	PTFE	042X052X1.50 O-RING PTFE BACK-UP
42.1	48.2	1.4	PTFE	42.10X48.20X1.40 O-RING PTFE BACK-UP
43	48	1.25	—	043X48X1.25 O-RING PU YELLOW BACK-UP
43	48	1.25	PTFE	043X048X1.25 O-RING PTFE BACK-UP
43	49	1.25	PTFE	043X049X1.25 O-RING PTFE BACK-UP
43	51	2	PTFE	043X051X2.00 O-RING PTFE BACK-UP
43.5	46.1	1.5	PTFE	043.5X046.1X1.50 O-RING PTFE BACK-UP
44	49	1	PTFE	044X049X1.00 O-RING PTFE BACK-UP
44	50	1.25	PTFE	044X050X1.25 O-RING PTFE BACK-UP
44.45	50.8	1.25	PTFE	44.45X50.80X1.25(1S0670) O-RING PTFE BACK-UP
44.8	50.8	1.25	PTFE	44.80X50.80X1.25I(6V1556) O-RING PTFE BACK-UP
45	49	1.25	PTFE	045X049X1.25 O-RING PTFE BACK-UP
45	50	1.25	PTFE	045X050X1.25 O-RING PTFE BACK-UP
45	51	1.25	PTFE	045X051X1.25 O-RING PTFE BACK-UP
45	51	1.5	PTFE	045X051X1.50 O-RING PTFE BACK-UP
45	55	1.55	PTFE	045X055X1.55 O-RING PTFE BACK-UP
45	54	1.9	PTFE	045X054X1.90 O-RING PTFE BACK-UP
45	55	1.9	PTFE	045X055X1.90 O-RING PTFE BACK-UP
45	50	2	PTFE	045X050X2.00 O-RING PTFE BACK-UP
46	52	1.2	PTFE	046X052X1.20 O-RING PTFE BACK-UP
46	52	1.25	PTFE	046X052X1.25 O-RING PTFE BACK-UP
46	55	2	PTFE	046X055X2.00 O-RING PTFE BACK-UP
47	52	1.25	PTFE	047X052X1.25 O-RING PTFE BACK-UP
47	53	1.25	PTFE	047X053X1.25 O-RING PTFE BACK-UP
48	53	1.25	PTFE	048X053X1.25 O-RING PTFE BACK-UP
48	54	1.25	PTFE	048X054X1.25 O-RING PTFE BACK-UP
49	55	1.25	PTFE	049X055X1.25 O-RING PTFE BACK-UP
50	54	1.25	PTFE	050X054X1.25 O-RING PTFE BACK-UP
50	55	1.25	PTFE	050X055X1.25 O-RING PTFE BACK-UP
50	55	1.25	—	050X55X1.25 O-RING PU YELLOW BACK-UP
50	56	1.25	PTFE	050X056X1.25 O-RING PTFE BACK-UP
50	60	1.9	PTFE	050X060X1.90 O-RING PTFE BACK-UP
50	65	1.9	PTFE	050X065X1.90 O-RING PTFE BACK-UP
50	60	4	PTFE	050X060X4 O-RING PTFE BACK-UP
50.9	57	1.2	PTFE	050.90X057X1.20 O-RING PTFE BACK-UP
51	56	1.25	PTFE	051X056X1.25 O-RING PTFE BACK-UP
52	57	1.25	PTFE	052X057X1.25 O-RING PTFE BACK-UP
53	71	1	PTFE	053X071X1.00 O-RING PTFE BACK-UP
53	58	1.25	PTFE	053X058X1.25 O-RING PTFE BACK-UP
53.98	60.33	1.27	—	053.98X60.33X1.27 O-RING PU ORANGE BACK-UP
54	60	1.25	PTFE	054X060X1.25 O-RING PTFE BACK-UP
54	62	1.25	PTFE	054X062X1.25 O-RING PTFE BACK-UP
54.5	59.74	0.5	PTFE	54.50X59.74X0.50 O-RING PTFE BACK-UP
54.5	59.74	0.6	PTFE	54.50X59.74X0.60 O-RING PTFE BACK-UP
55	59	1.25	PTFE	055X059X1.25 O-RING PTFE BACK-UP
55	60	1.25	PTFE	055X060X1.25 O-RING PTFE BACK-UP
55	61	1.25	PTFE	055X061X1.25 O-RING PTFE BACK-UP
55	60	1.5	PTFE	055X060X1.50 O-RING PTFE BACK-UP
55	65	1.9	PTFE	055X065X1.90 O-RING PTFE BACK-UP
55.2	48	1	PTFE	055.2X48X1.00 O-RING PTFE BACK-UP
55.2	60.5	1.5	PTFE	055.2X060.5X1.50 O-RING PTFE BACK-UP
56	61	1.25	PTFE	056X061X1.25 O-RING PTFE BACK-UP
56.5	68.7	6.5	—	056.5X68.7X6.5 POLYETHYLENE SPRING-LOADED SEAL
57	62	1.25	PTFE	057X062X1.25 O-RING PTFE BACK-UP
57	63	1.25	PTFE	057X063X1.25 O-RING PTFE BACK-UP
57	61.6	1.5	PTFE	057X061.6X1.50 O-RING PTFE BACK-UP
57.53	47.93	2.5	—	57.53x47.93x2.5 O-RING BACK-UP RING
58	62	1.25	PTFE	058X062X1.25 O-RING PTFE BACK-UP
58	63	1.25	PTFE	058X063X1.25 O-RING PTFE BACK-UP
58	64	1.25	PTFE	058X064X1.25 O-RING PTFE BACK-UP
58.5	64	1.2	PTFE	058.5X064X1.20 O-RING PTFE BACK-UP
59	63.4	1	—	059X063.4X1.00 O-RING RUBBER BACK-UP(RUBBER)
59	65	1.25	PTFE	059X065X1.25 O-RING PTFE BACK-UP
60	64	1.25	PTFE	060X064X1.25 O-RING PTFE BACK-UP
60	65	1.25	PTFE	060X065X1.25 O-RING PTFE BACK-UP
60	66	1.25	PTFE	060X066X1.25 O-RING PTFE BACK-UP
60	66	1.5	PTFE	060X066X1.50 O-RING PTFE BACK-UP
60	70	1.9	PTFE	060X070X1.90 O-RING PTFE BACK-UP
60	70	2	PTFE	060X070X2.00 O-RING PTFE BACK-UP
60	50	4	PTFE	060X050X4 O-RING PTFE BACK-UP
61	70	1.9	PTFE	061X070X1.90 O-RING PTFE BACK-UP
62	67	1.25	PTFE	062X067X1.25 O-RING PTFE BACK-UP
62	70	1.9	PTFE	062X070X1.90 O-RING PTFE BACK-UP
62	64.5	2.9	PTFE	062X064.5X2.90 O-RING PTFE BACK-UP
62.5	68.7	1.2	PTFE	062.5X068.7X1.20 O-RING PTFE BACK-UP
63	68	1.25	PTFE	063X068X1.25 O-RING PTFE BACK-UP
63.8	69.85	1.25	PTFE	63.80X69.85X1.25(4J9225 6V1555) O-RING PTFE BACK-UP
64	68	1.25	PTFE	064X068X1.25 O-RING PTFE BACK-UP
64	70	1.25	PTFE	064X070X1.25 O-RING PTFE BACK-UP
65	69	1.25	PTFE	065X069X1.25 O-RING PTFE BACK-UP
65	70	1.25	PTFE	065X070X1.25 O-RING PTFE BACK-UP
65	71	1.25	PTFE	065X071X1.25 O-RING PTFE BACK-UP
65	75	1.9	PTFE	065X075X1.90 O-RING PTFE BACK-UP
66	76	1.1	PTFE	066X076X1.10 O-RING PTFE BACK-UP
66	70	1.25	PTFE	066X070X1.25 O-RING PTFE BACK-UP
66	71	1.25	PTFE	066X071X1.25 O-RING PTFE BACK-UP
66.8	76	1.7	PTFE	066.8X076X1.70 O-RING PTFE BACK-UP
67	75	1.25	PTFE	067X075X1.25 O-RING PTFE BACK-UP
67.2	76.2	1.5	PTFE	067.2X076.2X1.50 O-RING PTFE BACK-UP
68	73	1.25	PTFE	068X073X1.25 O-RING PTFE BACK-UP
68	74.4	1.5	PTFE	068X074.4X1.50 O-RING PTFE BACK-UP
69	75	1.25	PTFE	069X075X1.25 O-RING PTFE BACK-UP
69.1	63.3	1.09	—	69.1x63.3x1.09 O-RING BACK-UP RING
69.85	76.2	1.27	—	069.85X76.2X1.27(6J5731) O-RING PU ORANGE BACK-UP
70	74	1.25	PTFE	070X074X1.25 O-RING PTFE BACK-UP
70	75	1.25	PTFE	070X075X1.25 O-RING PTFE BACK-UP
70	75	1.25	—	070X75X1.25 O-RING PU YELLOW BACK-UP
70	76	1.25	PTFE	070X076X1.25 O-RING PTFE BACK-UP
70	75.8	1.5	PTFE	070X075.8X1.50 O-RING PTFE BACK-UP
70	80	1.9	PTFE	070X080X1.90 O-RING PTFE BACK-UP
70	75	3	PTFE	070X075X3.00 O-RING PTFE BACK-UP
70.2	70.12	3	PTFE	070.20X70.12X3.00 O-RING PTFE BACK-UP
70.62	75	3.53	PTFE	070.62X075X3.53 O-RING PTFE BACK-UP
71	80	1.9	PTFE	071X80X1.90 O-RING PTFE BACK-UP
72	80	1.9	PTFE	072X080X1.90 O-RING PTFE BACK-UP
72	80	3	PTFE	072X080X3.00 O-RING PTFE BACK-UP
73	80	1.5	PTFE	073X080X1.50 O-RING PTFE BACK-UP
73.3	79.3	1.25	PTFE	73.30X79.30X1.25(6V1558) O-RING PTFE BACK-UP
73.6	80	1.25	PTFE	073.6X080X1.25 O-RING PTFE BACK-UP
74	80	1.25	PTFE	074X080X1.25 O-RING PTFE BACK-UP
75	79	1.1	PTFE	075X079X1.10 O-RING PTFE BACK-UP
75	79	1.25	PTFE	075X079X1.25 O-RING PTFE BACK-UP
75	80	1.25	PTFE	075X080X1.25 O-RING PTFE BACK-UP
75	80	1.25	—	075X80X1.25 O-RING PU YELLOW BACK-UP
75	81	1.25	PTFE	075X081X1.25 O-RING PTFE BACK-UP
75	79.8	1.5	PTFE	075X079.8X1.50 O-RING PTFE BACK-UP
75	84	1.9	PTFE	075X084X1.90 O-RING PTFE BACK-UP
75	85	1.9	PTFE	075X085X1.90 O-RING PTFE BACK-UP
75.41	69.61	1.09	—	75.41x69.61x1.09 O-RING BACK-UP RING
76	80	1.25	PTFE	076X080X1.25 O-RING PTFE BACK-UP
76	81	1.25	PTFE	076X081X1.25 O-RING PTFE BACK-UP
76.2	82.55	1.27	—	076.2X82.55X1.27 O-RING PU ORANGE BACK-UP
79	85	1.25	PTFE	079X085X1.25 O-RING PTFE BACK-UP
80	82.1	1.25	PTFE	080X082.1X1.25 O-RING PTFE BACK-UP
80	84	1.25	PTFE	080X084X1.25 O-RING PTFE BACK-UP
80	85	1.25	PTFE	080X085X1.25 O-RING PTFE BACK-UP
80	85	1.25	—	080X85X1.25 O-RING PU YELLOW BACK-UP
80	86	1.25	PTFE	080X086X1.25 O-RING PTFE BACK-UP
80	90	1.9	PTFE	080X090X1.90 O-RING PTFE BACK-UP
80	90	3	PTFE	080X090X3.00 O-RING PTFE BACK-UP
81	85	1.25	PTFE	081X085X1.25 O-RING PTFE BACK-UP
81.72	75.92	1.09	—	81.72x75.92x1.09 O-RING BACK-UP RING
82	75	1.5	PTFE	082X075X1.50 O-RING PTFE BACK-UP
82	90	1.9	PTFE	082X090X1.90 O-RING PTFE BACK-UP
82.55	88.9	1.27	—	082.55X88.9X1.27(4J9224) O-RING PU ORANGE BACK-UP
82.6	76.9	1.4	—	82.6x76.9x1.4 O-RING BACK-UP RING
83.6	90	1.5	PTFE	083.6X090X1.50 O-RING PTFE BACK-UP
84	90	1.25	PTFE	084X090X1.25 O-RING PTFE BACK-UP
84	91	1.25	PTFE	084X091X1.25 O-RING PTFE BACK-UP
84	90	2	PTFE	084X090X2.00 O-RING PTFE BACK-UP
84	89	3	PTFE	084X089X3 O-RING PTFE BACK-UP
85	89	1.25	PTFE	085X089X1.25 O-RING PTFE BACK-UP
85	90	1.25	PTFE	085X090X1.25 O-RING PTFE BACK-UP
85	91	1.25	PTFE	085X091X1.25 O-RING PTFE BACK-UP
85	95	1.9	PTFE	085X095X1.90 O-RING PTFE BACK-UP
85	91	2	PTFE	085X091X2.00 O-RING PTFE BACK-UP
85.53	79.53	1.09	—	85.53x79.53x1.09 O-RING BACK-UP RING
86	91	1.25	PTFE	086X091X1.25 O-RING PTFE BACK-UP
88.03	82.23	1.09	—	88.03x82.23x1.09 O-RING BACK-UP RING
88.9	95.25	1.27	—	088.90X95.25X1.27(1S0669) O-RING PU ORANGE BACK-UP
89	95	1.25	PTFE	089X095X1.25 O-RING PTFE BACK-UP
90	94	1.25	PTFE	090X094X1.25 O-RING PTFE BACK-UP
90	95	1.25	PTFE	090X095X1.25 O-RING PTFE BACK-UP
90	96	1.25	PTFE	090X096X1.25 O-RING PTFE BACK-UP
90	94	1.5	PTFE	090X094X1.50 O-RING PTFE BACK-UP
90	98	1.7	PTFE	090X098X1.70 O-RING PTFE BACK-UP
90	100	1.9	PTFE	090X100X1.90 O-RING PTFE BACK-UP
91	100	1.9	PTFE	091X100X1.90 O-RING PTFE BACK-UP
91	96.6	2	PTFE	091X096.6X2.00 O-RING PTFE BACK-UP
91.88	85.88	1.09	—	91.88x85.88x1.09 O-RING BACK-UP RING
92	100	1.9	PTFE	092X100X1.90 O-RING PTFE BACK-UP
92.08	98.43	1.27	—	092.08X98.43X1.27(4J9219) O-RING PU ORANGE BACK-UP
94	91	1.25	PTFE	094X091X1.25 O-RING PTFE BACK-UP
94	100	1.25	PTFE	094X100X1.25 O-RING PTFE BACK-UP
94.38	88.55	1.09	—	94.38x88.55x1.09 O-RING BACK-UP RING
94.8	85.2	1.9	—	94.8x85.2x1.9 O-RING BACK-UP RING
94.8	101	2	PTFE	094.80X101X2.00 O-RING PTFE BACK-UP
95	99	1.25	PTFE	095X099X1.25 O-RING PTFE BACK-UP
95	100	1.25	PTFE	095X100X1.25 O-RING PTFE BACK-UP
95	101	1.25	PTFE	095X101X1.25 O-RING PTFE BACK-UP
95	105	1.9	PTFE	095X105X1.90 O-RING PTFE BACK-UP
95.6	101.6	1.25	PTFE	95.60X101.60X1.25I(2K6830)O-RING PTFE BACK-UP
96	101	1.25	PTFE	096X101X1.25 O-RING PTFE BACK-UP
99	105	1.25	PTFE	099X105X1.25 O-RING PTFE BACK-UP
99	101	2.9	PTFE	099X101X2.90 O-RING PTFE BACK-UP
99.8	95.2	1.25	—	99.8x95.2x1.25 O-RING BACK-UP RING
99.8	90.2	1.9	—	99.8x90.2x1.9 O-RING BACK-UP RING
100	104	1.25	PTFE	100X104X1.25 O-RING PTFE BACK-UP
100	105	1.25	PTFE	100X105X1.25 O-RING PTFE BACK-UP
100	106	1.25	PTFE	100X106X1.25 O-RING PTFE BACK-UP
100	95	1.9	—	100x95x1.9 O-RING BACK-UP RING
100	110	1.9	PTFE	100X110X1.90 O-RING PTFE BACK-UP
100	110	1.9	—	100X110X1.90 O-RING PU YELLOW BACK-UP
100.66	94.86	1.09	—	100.66x94.86x1.09 O-RING BACK-UP RING
101.6	107.95	1.27	—	101.6X107.95X1.27(5J7865) O-RING PU ORANGE BACK-UP
102	110	1.5	PTFE	102X110X1.50 O-RING PTFE BACK-UP
102	110	1.9	PTFE	102X110X1.90 O-RING PTFE BACK-UP
103	110	1.25	PTFE	103X110X1.25 O-RING PTFE BACK-UP
103	110	1.5	PTFE	103X110X1.50 O-RING PTFE BACK-UP
104	110	1.25	PTFE	104X110X1.25 O-RING PTFE BACK-UP
104	111	1.25	PTFE	104X111X1.25 O-RING PTFE BACK-UP
104.58	98.58	1.09	—	104.58x98.58x1.09 O-RING BACK-UP RING
104.8	95.2	1.9	—	104.8x95.2x1.9 O-RING BACK-UP RING
105	109	1.25	PTFE	105X109X1.25 O-RING PTFE BACK-UP
105	110	1.25	PTFE	105X110X1.25 O-RING PTFE BACK-UP
105	114.3	1.65	PTFE	105X114.30X1.65(8J3752) O-RING PTFE BACK-UP
105	114	1.9	PTFE	105X114X1.90 O-RING PTFE BACK-UP
105	115	1.9	PTFE	105X115X1.90 O-RING PTFE BACK-UP
105.1	111.1	1.25	PTFE	105.10X111.10X1.25(4J9220 5W1723) O-RING PTFE BACK
105.7	99.7	1.09	—	105.7x99.7x1.09 O-RING BACK-UP RING
106	111	1.25	PTFE	106X111X1.25 O-RING PTFE BACK-UP
106.97	101.17	1.09	—	106.97x101.17x1.09 O-RING BACK-UP RING
108	113	1.25	PTFE	108X113X1.25 O-RING PTFE BACK-UP
108	120	2.9	PTFE	108X120X2.90 O-RING PTFE BACK-UP
108.3	114.3	1.25	PTFE	108.30X114.30X1.25(1K7095) O-RING PTFE BACK-UP
109	115	1.25	PTFE	109X115X1.25 O-RING PTFE BACK-UP
109.8	100.2	1.9	—	109.8x100.2x1.9 O-RING BACK-UP RING
110	115	1.25	PTFE	110X115X1.25 O-RING PTFE BACK-UP
110	115	1.25	—	110X115X1.25 O-RING PU YELLOW BACK-UP
110	116	1.25	PTFE	110X116X1.25 O-RING PTFE BACK-UP
110	126	1.3	PTFE	110X126X1.3 O-RING PTFE BACK-UP
110	120	1.7	PTFE	110X120X1.70 O-RING PTFE BACK-UP
110	120	1.9	PTFE	110X120X1.90 O-RING PTFE BACK-UP
110	120	1.9	—	110X120X1.90 O-RING PU YELLOW BACK-UP
110.93	104.93	1.09	—	110.93x104.93x1.09 O-RING BACK-UP RING
111	115	1.25	PTFE	111X115X1.25 O-RING PTFE BACK-UP
112	120	1.9	PTFE	112X120X1.90 O-RING PTFE BACK-UP
112	122	1.9	PTFE	112X122X1.90 O-RING PTFE BACK-UP
112	120	2	PTFE	112X120X2.00 O-RING PTFE BACK-UP
113.28	107.48	1.09	—	113.28x107.48x1.09 O-RING BACK-UP RING
114	120	1.25	PTFE	114X120X1.25 O-RING PTFE BACK-UP
114	124	1.5	PTFE	114X124X1.50 O-RING PTFE BACK-UP
114.3	120.65	1.27	PTFE	114.3X120.65X1.27(2J3961) O-RING PTFE BACK-UP
115	120	1.25	PTFE	115X120X1.25 O-RING PTFE BACK-UP
115	121	1.25	PTFE	115X121X1.25 O-RING PTFE BACK-UP
115	125	1.9	PTFE	115X125X1.90 O-RING PTFE BACK-UP
115	125	1.9	—	115X125X1.90 O-RING PU YELLOW BACK-UP
116	121	1.25	PTFE	116X121X1.25 O-RING PTFE BACK-UP
116	122	1.9	PTFE	116X122X1.90 O-RING PTFE BACK-UP
116	125	1.9	PTFE	116X125X1.90 O-RING PTFE BACK-UP
117	125	1.9	PTFE	117X125X1.90 O-RING PTFE BACK-UP
117	125	2	PTFE	117X125X2.00 O-RING PTFE BACK-UP
118	130	2.9	PTFE	118X130X2.90 O-RING PTFE BACK-UP
119	125	1.25	PTFE	119X125X1.25 O-RING PTFE BACK-UP
119.59	113.79	1.09	—	119.59x113.79x1.09 O-RING BACK-UP RING
119.8	115.2	1.25	—	119.8x115.2x1.25 O-RING BACK-UP RING
119.8	110.2	1.9	—	119.8x110.2x1.9 O-RING BACK-UP RING
120	124	1.25	PTFE	120X124X1.25 O-RING PTFE BACK-UP
120	125	1.25	PTFE	120X125X1.25 O-RING PTFE BACK-UP
120	126	1.25	PTFE	120X126X1.25 O-RING PTFE BACK-UP
120	115	1.5	—	120x115x1.5 O-RING BACK-UP RING
120	128	1.5	PTFE	120X128X1.50 O-RING PTFE BACK-UP
120	128	1.9	PTFE	120X128X1.90 O-RING PTFE BACK-UP
120	130	1.9	PTFE	120X130X1.90 O-RING PTFE BACK-UP
120	114	3	—	120x114x3 O-RING BACK-UP RING

This group contains 632 sizes in total; the first 400 are listed on this page. The remaining 232 can be found with the size finder.

What does a back-up ring do?

As pressure rises, the elastomer cross-section starts to flow (extrude) into the clearance gap. A back-up ring closes this gap, prevents extrusion and allows the sealing element to work at high pressure. It is usually fitted on the unpressurised side of the seal.

Material

Material options in this group

PTFE

Offers a very low coefficient of friction and broad chemical resistance. As it is not an elastomer it does not spring back by itself, so it is usually used with a spring or O-ring energiser.

Apart from the main material, this group contains 87 records in other materials; the material of each row is shown in the table above.

Send us your size

We can also supply sizes that are not on the list. Just send us the part's dimensions and operating conditions. See the group list for all product groups and the product catalogue for products with technical drawings.

Search this group by size +90 312 385 61 11