Copper seals

A copper washer is a consumable fitted under fittings, plugs and high-pressure bolts. It deforms on tightening and fills the surface irregularities, acting as a single-use seal. Below are 292 Hansa Flex CAR and CR sizes to DIN 7603.

Complete size range — 292

The table lists 292 sizes. Start typing a part number or size to filter the list.

292

Part number	Ø1, mm	Ø2, mm	Thickness, mm
CAR
CAR 6-10-1.5	6	10	1.5
CAR 6-12-1.5	6	12	1.5
CAR 8-11.5-1.5	8	11.5	1.5
CAR 8-12-1.5	8	12	1.5
CAR 8-13-1.5	8	13	1.5
CAR 8-14-1.5	8	14	1.5
CAR 10-13.5-1.5	10	13.5	1.5
CAR 10-14-1.5	10	14	1.5
CAR 10-15-1.5	10	15	1.5
CAR 10-16-1.5	10	16	1.5
CAR 12-15.5-2	12	15.5	2
CAR 12-16-2	12	16	2
CAR 12-17-2	12	17	2
CAR 12-18-2	12	18	2
CAR 13-18-2	13	18	2
CAR 13-19-2	13	19	2
CAR 14-18-2	14	18	2
CAR 14-20-2	14	20	2
CAR 16-20-2	16	20	2
CAR 16-22-2	16	22	2
CAR 17-21-2	17	21	2
CAR 17-23-2	17	23	2
CAR 18-22-2	18	22	2
CAR 18-24-2	18	24	2
CAR 20-24-2	20	24	2
CAR 20-26-2	20	26	2
CAR 21-26-2	21	26	2
CAR 22-27-2	22	27	2
CAR 22-29-2	22	29	2
CAR 24-29-2.5	24	29	2.5
CAR 24-30-2.5	24	30	2.5
CAR 24-32-2.5	24	32	2.5
CAR 26-31-2.5	26	31	2.5
CAR 26-32-2.5	26	32	2.5
CAR 26-34-2.5	26	34	2.5
CAR 27-32-2.5	27	32	2.5
CAR 28-34-2.5	28	34	2.5
CAR 30-36-2.5	30	36	2.5
CAR 30-38-2.5	30	38	2.5
CAR 32-38-2.5	32	38	2.5
CAR 33-39-2.5	33	39	2.5
CAR 35-41-2.5	35	41	2.5
CAR 36-42-2.5	36	42	2.5
CAR 38-44-2.5	38	44	2.5
CAR 40-47-2.5	40	47	2.5
CAR 42-49-2.5	42	49	2.5
CAR 45-52-2.5	45	52	2.5
CAR 48-55-2.5	48	55	2.5
CAR 52-60-3	52	60	3
CAR 60-68-3	60	68	3
CR
CR 4-8-1	4	8	1
CR 5-10-1	5	10	1
CR 5-11-1.5	5	11	1.5
CR 5-7.5-1	5	7.5	1
CR 5-8-1	5	8	1
CR 5-9-1	5	9	1
CR 5-9-1.5	5	9	1.5
CR 5-9-2	5	9	2
CR 5.5-8-1	5.5	8	1
CR 6-10-1	6	10	1
CR 6-10-1.5	6	10	1.5
CR 6-10-2	6	10	2
CR 6-12-1	6	12	1
CR 6-12-1.5	6	12	1.5
CR 6-12-2	6	12	2
CR 6.2-17.5-2	6.2	17.5	2
CR 6.2-17.5-2.5	6.2	17.5	2.5
CR 6.5-11-1	6.5	11	1
CR 6.5-9.5-1	6.5	9.5	1
CR 8-11.5-1	8	11.5	1
CR 8-11.5-1.5	8	11.5	1.5
CR 8-11.5-2	8	11.5	2
CR 8-12-1	8	12	1
CR 8-12-1.5	8	12	1.5
CR 8-12-2	8	12	2
CR 8-13-1	8	13	1
CR 8-13-1.5	8	13	1.5
CR 8-13-2	8	13	2
CR 8-14-1	8	14	1
CR 8-14-1.5	8	14	1.5
CR 8-14-2	8	14	2
CR 8-15-1	8	15	1
CR 8-19-2	8	19	2
CR 9-13-1	9	13	1
CR 9-14-1	9	14	1
CR 9-14-1.5	9	14	1.5
CR 10-13-1	10	13	1
CR 10-13.5-1	10	13.5	1
CR 10-13.5-1.5	10	13.5	1.5
CR 10-13.5-2	10	13.5	2
CR 10-14-1	10	14	1
CR 10-14-1.5	10	14	1.5
CR 10-14-2	10	14	2
CR 10-15-1	10	15	1
CR 10-15-1.5	10	15	1.5
CR 10-15-2	10	15	2
CR 10-16-1	10	16	1
CR 10-16-1.5	10	16	1.5
CR 10-16-2	10	16	2
CR 10-17-1	10	17	1
CR 10-17-1.5	10	17	1.5
CR 10-18-1	10	18	1
CR 10-18-1.5	10	18	1.5
CR 10-18-2	10	18	2
CR 10-20-1	10	20	1
CR 10-20-1.5	10	20	1.5
CR 10-20-2	10	20	2
CR 11-17-1	11	17	1
CR 11-17-1.5	11	17	1.5
CR 11-20-1	11	20	1
CR 11-24-2.5	11	24	2.5
CR 12-15.5-1	12	15.5	1
CR 12-15.5-1.5	12	15.5	1.5
CR 12-16-1	12	16	1
CR 12-16-1.5	12	16	1.5
CR 12-16-2	12	16	2
CR 12-17-1	12	17	1
CR 12-17-1.5	12	17	1.5
CR 12-17-2	12	17	2
CR 12-18-1	12	18	1
CR 12-18-1.5	12	18	1.5
CR 12-18-2	12	18	2
CR 12-19-1.5	12	19	1.5
CR 12-20-1	12	20	1
CR 12-20-1.5	12	20	1.5
CR 12-20-2	12	20	2
CR 13-17-1	13	17	1
CR 13-17-1.5	13	17	1.5
CR 13-17-2	13	17	2
CR 13-18-1	13	18	1
CR 13-18-1.5	13	18	1.5
CR 13-18-2	13	18	2
CR 13-19-1	13	19	1
CR 13-19-1.5	13	19	1.5
CR 13-19-2	13	19	2
CR 13-20-1	13	20	1
CR 13-20-1.5	13	20	1.5
CR 13-20-2	13	20	2
CR 13.5-17.5-1.5	13.5	17.5	1.5
CR 14-18-1	14	18	1
CR 14-18-1.5	14	18	1.5
CR 14-18-2	14	18	2
CR 14-20-1	14	20	1
CR 14-20-1.5	14	20	1.5
CR 14-20-2	14	20	2
CR 14-22-1.5	14	22	1.5
CR 14-22-2	14	22	2
CR 14-23-1.5	14	23	1.5
CR 14-24-1	14	24	1
CR 14-24-1.5	14	24	1.5
CR 14-24-2	14	24	2
CR 15-19-1.5	15	19	1.5
CR 15-20-1	15	20	1
CR 15-20-1.5	15	20	1.5
CR 15-20-2	15	20	2
CR 16-20-1	16	20	1
CR 16-20-1.5	16	20	1.5
CR 16-20-2	16	20	2
CR 16-21-1.5	16	21	1.5
CR 16-21-2	16	21	2
CR 16-22-1	16	22	1
CR 16-22-1.5	16	22	1.5
CR 16-22-2	16	22	2
CR 16-24-1.5	16	24	1.5
CR 16-24-2	16	24	2
CR 16.5-22-1.5	16.5	22	1.5
CR 16.5-23-1.5	16.5	23	1.5
CR 16.5-24-1	16.5	24	1
CR 16.5-24-1.5	16.5	24	1.5
CR 17-21-1	17	21	1
CR 17-21-1.5	17	21	1.5
CR 17-21-2	17	21	2
CR 17-22-1	17	22	1
CR 17-22-1.5	17	22	1.5
CR 17-22-2	17	22	2
CR 17-23-1	17	23	1
CR 17-23-1.5	17	23	1.5
CR 17-23-2	17	23	2
CR 17-25-1.5	17	25	1.5
CR 17-25-2	17	25	2
CR 18-22-1	18	22	1
CR 18-22-1.5	18	22	1.5
CR 18-22-2	18	22	2
CR 18-23-1.5	18	23	1.5
CR 18-23-2	18	23	2
CR 18-24-1	18	24	1
CR 18-24-1.5	18	24	1.5
CR 18-24-2	18	24	2
CR 18-26-1.5	18	26	1.5
CR 19-25-1.5	19	25	1.5
CR 20-24-1	20	24	1
CR 20-24-1.5	20	24	1.5
CR 20-24-2	20	24	2
CR 20-26-1	20	26	1
CR 20-26-1.5	20	26	1.5
CR 20-26-2	20	26	2
CR 20-28-1.5	20	28	1.5
CR 21-25-1.5	21	25	1.5
CR 21-26-1	21	26	1
CR 21-26-1.5	21	26	1.5
CR 21-26-2	21	26	2
CR 21-27-1	21	27	1
CR 21-27-1.5	21	27	1.5
CR 21-27-2	21	27	2
CR 21-27-3	21	27	3
CR 21-28-1	21	28	1
CR 21-28-1.5	21	28	1.5
CR 21-28-2	21	28	2
CR 21-30-1	21	30	1
CR 22-26-1.5	22	26	1.5
CR 22-26-2	22	26	2
CR 22-27-1	22	27	1
CR 22-27-1.5	22	27	1.5
CR 22-27-2	22	27	2
CR 22-28-1	22	28	1
CR 22-28-1.5	22	28	1.5
CR 22-28-2	22	28	2
CR 22-29-1	22	29	1
CR 22-29-1.5	22	29	1.5
CR 22-29-2	22	29	2
CR 23-28-2	23	28	2
CR 23-30-1.5	23	30	1.5
CR 23-30-2	23	30	2
CR 24-29-1.5	24	29	1.5
CR 24-29-2	24	29	2
CR 24-30-1	24	30	1
CR 24-30-1.5	24	30	1.5
CR 24-30-2	24	30	2
CR 24-32-1.5	24	32	1.5
CR 24-32-2	24	32	2
CR 25-30-2	25	30	2
CR 25-33-2	25	33	2
CR 26-30-1	26	30	1
CR 26-31-1.5	26	31	1.5
CR 26-31-2	26	31	2
CR 26-32-1.5	26	32	1.5
CR 26-32-2	26	32	2
CR 26-34-1.5	26	34	1.5
CR 26-34-2	26	34	2
CR 26-36-2	26	36	2
CR 26.5-33-2	26.5	33	2
CR 27-32-1.5	27	32	1.5
CR 27-32-2	27	32	2
CR 27-33-2	27	33	2
CR 27-34-2	27	34	2
CR 27-35-1.5	27	35	1.5
CR 27-35-2	27	35	2
CR 27-38-2	27	38	2
CR 28-33-2	28	33	2
CR 28-34-2	28	34	2
CR 28-36-2	28	36	2
CR 30-36-1	30	36	1
CR 30-36-1.5	30	36	1.5
CR 30-36-2	30	36	2
CR 30-38-1.5	30	38	1.5
CR 30-38-2	30	38	2
CR 30-42-2	30	42	2
CR 31-43-2	31	43	2
CR 32-38-1.5	32	38	1.5
CR 32-38-2	32	38	2
CR 32-40-2	32	40	2
CR 33-39-1.5	33	39	1.5
CR 33-39-2	33	39	2
CR 33-40-2	33	40	2
CR 33-41-2	33	41	2
CR 35-41-1.5	35	41	1.5
CR 35-41-2	35	41	2
CR 35-42-3.5	35	42	3.5
CR 36-42-1.5	36	42	1.5
CR 36-42-2	36	42	2
CR 36-44-2	36	44	2
CR 38-44-2	38	44	2
CR 38-46-1.5	38	46	1.5
CR 38-46-2	38	46	2
CR 38-49-2	38	49	2
CR 39-46-2	39	46	2
CR 39-48-2	39	48	2
CR 40-47-2	40	47	2
CR 40-49-2	40	49	2
CR 42-49-2	42	49	2
CR 42-51-1.5	42	51	1.5
CR 44-51-2	44	51	2
CR 45-52-2	45	52	2
CR 48-55-2	48	55	2
CR 48-57-2	48	57	2
CR 50-57-2	50	57	2
CR 52-60-2.5	52	60	2.5
CR 60-68-2.5	60	68	2.5
CR 64-72-2.5	64	72	2.5
CR 65-74-2.5	65	74	2.5
CR 75-84-2.5	75	84	2.5
CR 90-100-2.5	90	100	2.5

How to select the size

Washer size means inner diameter, outer diameter and thickness. The inner diameter must match the fitting bore, not the thread.

A copper washer must never be reused: after tightening it is already deformed and will not seal. Replace it on every rebuild.

Materials

The material is chosen by medium and temperature, not by price:

NBR — the standard for mineral oil, −30…+100 °C. Most common and least expensive.
FKM (Viton) — up to +200 °C, aggressive media, brake fluid. Three to five times the price of NBR.
PU (polyurethane) — high pressure and abrasion, but not above +80 °C.
PTFE — chemicals, very low friction, but poor under compression without support.
EPDM — water, steam, glycol-based brake fluid. Not compatible with oil.

Common fitting mistakes

Three mistakes that make a new seal leak within a day:

Damaged lip during fitting. The seal is pushed over threads or splines without a sleeve — the lip is cut and you cannot see it.
Measuring a worn part. The old ring has lost its shape, so the new size does not seat in the groove.
No back-up ring. Above 160 bar the seal extrudes into the gap.

Frequently asked questions

Copper or aluminium?
Copper handles higher pressure and temperature; aluminium is softer and conforms better to surface imperfections. For high-pressure hydraulics use copper.

Can a copper washer be annealed and reused?
Annealing restores softness but not geometry. In the field this is acceptable as a stopgap; per procedure, always fit a new washer.

Why does a washer leak after tightening?
It has been used before, the torque is insufficient, or the seating face is scored.

Copper crush washers for high-temperature and high-pressure sealing on hydraulic fittings, injectors and exhaust connections. Genuine parts in metric and inch sizes from 6 to 60 mm. Copper holds its seal at temperatures where aluminium softens. Send the size or the original part number and we confirm within 24 hours.

Showing 225–240 of 292 results

Frequently Asked Questions

Do you supply genuine parts or Chinese equivalents?

Genuine parts are our main business. If you need a lower-cost option, we can also look for a Chinese-made equivalent with the same mounting dimensions and ratings.

What is the lead time?

It depends on the supplier. If the factory has stock or produces in China, we ship quickly. A factory order that must be manufactured or shipped from abroad takes longer. We confirm the exact date in your quote.

How do I place an order?

Send the part number, a photo of the nameplate, or the machine model. We confirm availability and price within 24 hours.

What are the payment and shipping terms?

EXW by default. 20-50% prepayment, balance before shipment. We can work with your freight forwarder.

What are copper seals used for?

Copper crush washers for high-temperature and high-pressure sealing on hydraulic fittings and injectors.

What sizes are available?

Metric and inch sizes from 6 mm to 60 mm. Send the required size or the original part number.

Copper seals

Complete size range — 292

How to select the size

Materials

Common fitting mistakes

Frequently asked questions

Copper seals Hansa Flex CR 32-40-2

Copper seals Hansa Flex CR 33-39-1.5

Copper seals Hansa Flex CR 33-39-2

Copper seals Hansa Flex CR 33-40-2

Copper seals Hansa Flex CR 33-41-2

Copper seals Hansa Flex CR 35-41-1.5

Copper seals Hansa Flex CR 35-41-2

Copper seals Hansa Flex CR 35-42-3.5

Copper seals Hansa Flex CR 36-42-1.5

Copper seals Hansa Flex CR 36-42-2

Copper seals Hansa Flex CR 36-44-2

Copper seals Hansa Flex CR 38-44-2

Copper seals Hansa Flex CR 38-46-1.5

Copper seals Hansa Flex CR 38-46-2

Copper seals Hansa Flex CR 38-49-2

Copper seals Hansa Flex CR 39-46-2