STANDARD BACK-UP RING

Primarily an anti-extrusion device, standard back-up rings are used in both static and dynamic sealing. Made of materials that are resistant to pressure induced flow, back-up rings prevent a seal from extruding into the clearance gap between mating parts.

All Seals's standard Hytrel® back-up rings are equivalent to AN6224, AN6246, MS28774, MS28782, and MS28783 specifications. Our PTFE back-up rings feature a scarf cut to facilitate installation and are precisely machined to MS28774 specifications. Both types of back-up rings share a common rectangular cross-section.

Stock Materials are PTFE & Hytrel®. The temperatures ranges are -300°F to +500°F for PTFE and -60°F to +275°F for Hytrel®.

Split PTFE Back-Up Ring Size Chart

DASH NO.	DIM(in.) "M"	DIM(in.) "T"	DIM(in.) "W"	∠"X°"
004	0.109	.045/.052	.052/.054	39
005	0.124	.045/.052	.052/.054	33
006	0.140	.045/.052	.052/.054	30
007	0.171	.045/.052	.052/.054	26
008	0.202	.045/.052	.052/.054	22
009	0.234	.045/.052	.052/.054	22
010	0.265	.045/.052	.052/.054	22
011	0.327	.045/.052	.052/.054	22
012	0.390	.045/.052	.052/.054	22
013	0.455	.045/.052	.052/.054	22
014	0.518	.045/.052	.052/.054	22
015	0.580	.045/.052	.052/.054	22
016	0.643	.045/.052	.052/.054	22
017	0.705	.045/.052	.052/.054	22
018	0.768	.045/.052	.052/.054	22
019	0.830	.045/.052	.052/.054	22
020	0.898	.045/.052	.052/.054	22
021	0.960	.045/.052	.052/.054	22
022	1.023	.045/.052	.052/.054	22
023	1.085	.045/.052	.052/.054	22
024	1.148	.045/.052	.052/.054	22
025	1.210	.045/.052	.052/.054	22
026	1.273	.045/.052	.052/.054	22
027	1.335	.045/.052	.052/.054	22
028	1.398	.045/.052	.052/.054	22
110	0.390	.045/.052	.085/.087	22
111	0.452	.045/.052	.085/.087	22
112	0.515	.045/.052	.085/.087	22
113	0.577	.045/.052	.085/.087	22
114	0.640	.045/.052	.085/.087	22
115	0.702	.045/.052	.085/.087	22
116	0.765	.045/.052	.085/.087	22
117	0.832	.045/.052	.085/.087	22
118	0.895	.045/.052	.085/.087	22
119	0.957	.045/.052	.085/.087	22
120	1.020	.045/.052	.085/.087	22
121	1.082	.045/.052	.085/.087	22
122	1.145	.045/.052	.085/.087	22
123	1.207	.045/.052	.085/.087	22
124	1.270	.045/.052	.085/.087	22
125	1.332	.045/.052	.085/.087	22
126	1.397	.045/.052	.085/.087	22
127	1.459	.045/.052	.085/.087	22
128	1.522	.045/.052	.085/.087	22
129	1.584	.045/.052	.085/.087	22
130	1.647	.045/.052	.085/.087	22
131	1.709	.045/.052	.085/.087	22
132	1.772	.045/.052	.085/.087	22
133	1.834	.045/.052	.085/.087	22
134	1.897	.045/.052	.085/.087	22
135	1.959	.045/.052	.085/.087	22
136	2.022	.045/.052	.085/.087	22
137	2.084	.045/.052	.085/.087	22
138	2.147	.045/.052	.085/.087	22
139	2.209	.045/.052	.085/.087	22
140	2.258	.045/.052	.085/.087	22
141	2.320	.045/.052	.085/.087	22
142	2.383	.045/.052	.085/.087	22
143	2.445	.045/.052	.085/.087	22
144	2.508	.045/.052	.085/.087	22
145	2.570	.045/.052	.085/.087	22
146	2.633	.045/.052	.085/.087	22
147	2.695	.045/.052	.085/.087	22
148	2.758	.045/.052	.085/.087	22
149	2.820	.045/.052	.085/.087	22
210	0.766	.045/.052	.118/.120	22
211	0.828	.045/.052	.118/.120	22
212	0.891	.045/.052	.118/.120	22
212	4.006	.045/.052	.118/.120	22
213	0.953	.045/.052	.118/.120	22
214	1.016	.045/.052	.118/.120	22
215	1.078	.045/.052	.118/.120	22
216	1.141	.045/.052	.118/.120	22
217	1.203	.045/.052	.118/.120	22
218	1.266	.045/.052	.118/.120	22
219	1.334	.045/.052	.118/.120	22
220	1.397	.045/.052	.118/.120	22
221	1.459	.045/.052	.118/.120	22
222	1.522	.045/.052	.118/.120	22
223	1.647	.045/.052	.118/.120	22
224	1.772	.045/.052	.118/.120	22
225	1.897	.045/.052	.118/.120	22
226	2.022	.045/.052	.118/.120	22
227	2.147	.045/.052	.118/.120	22
228	2.272	.045/.052	.118/.120	22
229	2.397	.045/.052	.118/.120	22
230	2.522	.045/.052	.118/.120	22
231	2.631	.045/.052	.118/.120	22
232	2.756	.045/.052	.118/.120	22
233	2.881	.045/.052	.118/.120	22
234	3.006	.045/.052	.118/.120	22
235	3.131	.045/.052	.118/.120	22
236	3.256	.045/.052	.118/.120	22
237	3.381	.045/.052	.118/.120	22
238	3.506	.045/.052	.118/.120	22
239	3.631	.045/.052	.118/.120	22
240	3.756	.045/.052	.118/.120	22
241	3.881	.045/.052	.118/.120	22
243	4.131	.045/.052	.118/.120	22
244	4.256	.045/.052	.118/.120	22
245	4.381	.045/.052	.118/.120	22
246	4.506	.045/.052	.118/.120	22
247	4.631	.045/.052	.118/.120	22
325	1.513	.065/.075	.182/.184	22
326	1.638	.065/.075	.182/.184	22
327	1.763	.065/.075	.182/.184	22
328	1.888	.065/.075	.182/.184	22
329	2.013	.065/.075	.182/.184	22
330	2.138	.065/.075	.182/.184	22
331	2.268	.065/.075	.182/.184	22
332	2.393	.065/.075	.182/.184	22
333	2.518	.065/.075	.182/.184	22
334	2.643	.065/.075	.182/.184	22
335	2.768	.065/.075	.182/.184	22
336	2.893	.065/.075	.182/.184	22
337	3.018	.065/.075	.182/.184	22
338	3.143	.065/.075	.182/.184	22
339	3.273	.065/.075	.182/.184	22
340	3.398	.065/.075	.182/.184	22
341	3.523	.065/.075	.182/.184	22
342	3.648	.065/.075	.182/.184	22
343	3.773	.065/.075	.182/.184	22
344	3.898	.065/.075	.182/.184	22
345	4.028	.065/.075	.182/.184	22
346	4.153	.065/.075	.182/.184	22
347	4.278	.065/.075	.182/.184	22
348	4.403	.065/.075	.182/.184	22
349	4.528	.065/.075	.182/.184	22
425	4.551	.100/.110	.235/.237	22
426	4.676	.100/.110	.235/.237	22
427	4.801	.100/.110	.235/.237	22
428	4.926	.100/.110	.235/.237	22
429	5.051	.100/.110	.235/.237	22
430	5.176	.100/.110	.235/.237	22
431	5.301	.100/.110	.235/.237	22
432	5.426	.100/.110	.235/.237	22
433	5.551	.100/.110	.235/.237	22
434	5.676	.100/.110	.235/.237	22
435	5.801	.100/.110	.235/.237	22
436	5.926	.100/.110	.235/.237	22
437	6.051	.100/.110	.235/.237	22
438	6.274	.100/.110	.235/.237	22
439	6.524	.100/.110	.235/.237	22
440	6.774	.100/.110	.235/.237	22
441	7.024	.100/.110	.235/.237	22
442	7.274	.100/.110	.235/.237	22
443	7.524	.100/.110	.235/.237	22
444	7.774	.100/.110	.235/.237	22
445	8.024	.100/.110	.235/.237	22
446	8.524	.100/.110	.235/.237	22
447	9.024	.100/.110	.235/.237	22
448	9.524	.100/.110	.235/.237	22
449	10.024	.100/.110	.235/.237	22
450	10.524	.100/.110	.235/.237	22
451	11.024	.100/.110	.235/.237	22
452	11.524	.100/.110	.235/.237	22
453	12.024	.100/.110	.235/.237	22
454	12.524	.100/.110	.235/.237	22
455	13.024	.100/.110	.235/.237	22
456	13.524	.100/.110	.235/.237	22
457	14.024	.100/.110	.235/.237	22
458	14.524	.100/.110	.235/.237	22
459	15.024	.100/.110	.235/.237	22
460	15.524	.100/.110	.235/.237	22

20762 Linear Lane Lake Forest, CA 92630 • ISO Certified Company