Parker 51 Series DIN Field Attachable Fittings

This page is for reference only. The 51 Series Fittings are now bein phased out and replaced by Series 51R.

Parker 2C351 Field Attachable Fittings

Swivel DIN 20078 Light Series

For available sizes, refer to the table below.

Steel Part Number	Thread Size	Hose I.D.	A		Cutoff Allow. B		H Hex	J Hex	W Hex
Hose Fitting		inch	inch	mm	inch	mm	mm	mm	mm
2C351-6-3	M12 X 1,5	3/16	1.69	43	0.94	24	-	14	16
2C351-8-4	M14 X 1,5	1/4	1.85	47	0.98	25	-	17	17
2C351-10-5 (+)	M16 X 1,5	5/16	1.89	48	0.87	22	-	19	19
2C351-10-6	M16 X 1,5	3/8	2.48	63	1.38	35	17	19	22
2C351-12-6	M18 X 1,5	3/8	2.48	63	1.34	34	19	22	22
2C351-15-8	M22 X 1,5	1/2	2.91	74	1.61	41	22	27	27
2C351-18-12	M26 X 1,5	3/4	3.07	78	1.46	37	27	32	35
2C351-22-12	M30 X 2	3/4	3.23	82	1.61	41	30	36	35
2C351-28-16	M36 X 2	1	3.86	98	2.05	52	36	46	43

Parker 2C451 Field Attachable Fittings

Swivel DIN 20078 Light Series 45° Elbow

For available sizes, refer to the table below.

Steel Part Number	Thread Size	Hose I.D.	A		Cutoff Allow. B		E		H Hex	J Hex	W Hex
Hose Fitting		inch	inch	mm	inch	mm	inch	mm	mm	mm	mm
2C451-6-3 (+)	M12 X 1,5	3/16	2.36	60	1.26	32	0.51	13	14	17	16
2C451-8-4 (+)	M14 X 1,5	1/4	2.32	59	1.57	40	0.51	13	14	17	17
2C451-10-5 (+)	M16 X 1,5	5/16	2.76	70	1.61	41	0.63	16	17	19	19
2C451-12-6	M18 X 1,5	3/8	3.50	89	2.28	58	0.75	19	17	22	22
2C451-18-12	M26 X 1,5	3/4	4.57	116	2.95	75	1.02	26	27	36	35
2C451-22-12	M30 X 2	3/4	4.69	119	3.11	79	1.14	29	30	36	35
2C451-28-16	M36 X 2	1	5.00	127	3.23	82	1.22	31	32	46	43

Parker 2C551 Field Attachable Fittings

Swivel DIN 20078 Light Series 90° Elbow

For available sizes, refer to the table below.

Steel Part Number	Thread Size	Hose I.D.	A		Cutoff Allow. B		E		H Hex	J Hex	W Hex
Hose Fitting		inch	inch	mm	inch	mm	inch	mm	mm	mm	mm
2C551-6-3 (+)	M12 X 1,5	3/16	2.17	55	1.30	33	1.02	26	14	17	16
2C551-8-4 (+)	M14 X 1,5	1/4	2.09	53	1.34	34	0.98	25	14	17	17
2C551-10-5 (+)	M16 X 1,5	5/16	2.60	66	1.57	40	1.26	32	17	19	19
2C551-10-6	M16 X 1,5	3/8	2.95	75	1.85	47	1.38	35	14	19	22
2C551-15-8	M22 X 1,5	1/2	3.50	89	2.09	53	1.65	42	22	27	27
2C551-18-12	M26 X 1,5	3/4	2.76	70	2.76	70	2.32	59	27	36	35
2C551-22-12	M30 X 2	3/4	2.87	73	2.87	73	2.52	64	30	36	35
2C551-28-16	M36 X 2	1	2.95	75	2.95	75	2.64	67	32	46	43

Parker 2C651 Field Attachable Fittings

Metric Swivel DIN 20078 Heavy Series (Without O-Ring)

For available sizes, refer to the table below.

Steel Part Number	Thread Size	Hose I.D.	A		Cutoff Allow. B		H Hex	J Hex	W Hex
Hose Fitting		inch	inch	mm	inch	mm	mm	mm	mm
2C651-8-3 (+)	M16 X 1,5	3/16	1.93	49	1.10	28	17	19	16
2C651-10-4 (+)	M18 X 1,5	1/4	2.40	61	1.42	36	17	22	17
2C651-12-5 (+)	M20 X 1,5	5/16	2.40	61	1.38	35	19	24	29
2C651-12-6	M20 X 1,5	3/8	2.52	64	1.42	36	19	24	22
2C651-14-6	M22 X 1,5	3/8	2.56	65	1.46	37	22	27	22
2C651-16-8	M24 X 1,5	1/2	2.87	73	1.57	40	24	30	27
2C651-20-12	M30 X 2	3/4	3.19	81	1.61	41	30	36	35
2C651-25-12	M36 X 2	3/4	3.19	81	1.57	40	36	46	35
2C651-30-16	M42 X 2	1	3.70	94	1.89	48	41	50	43

Parker 2C951 Field Attachable Fittings

Metric Swivel DIN 20078 Heavy Series (With O-Ring)

For available sizes, refer to the table below.

Steel Part Number	Thread Size	Hose I.D.	A		Cutoff Allow. B		H Hex	J Hex	W Hex
Hose Fitting		inch	inch	mm	inch	mm	mm	mm	mm
2C951-8-3 (+)	M16 X 1,5	3/16	1.93	49	1.10	28	17	19	16
2C951-10-4 (+)	M18 X 1,5	1/4	2.40	61	1.42	36	17	22	17
2C951-12-5 (+)	M20 X 1,5	5/16	2.40	61	1.38	35	19	24	29
2C951-12-6	M20 X 1,5	3/8	2.52	64	1.42	36	19	24	22
2C951-14-6	M22 X 1,5	3/8	2.56	65	1.46	37	22	27	22
2C951-16-8	M24 X 1,5	1/2	2.87	73	1.57	40	24	30	27
2C951-20-12	M30 X 2	3/4	3.19	81	1.61	41	30	36	35
2C951-25-12	M36 X 2	3/4	3.19	81	1.57	40	36	46	35
2C951-30-16	M42 X 2	1	3.70	94	1.89	48	41	50	43

Parker 2D051 Field Attachable Fittings

Stud DIN 20078 Light Series

For available sizes, refer to the table below.

Steel Part Number	Thread Size	Tube O.D.	Hose I.D.	A		Cutoff Allow. B		H Hex	W Hex
Hose Fitting		mm	inch	inch	mm	inch	mm	mm	mm
2D051-6-3	M12 X 1,5	6	3/16	1.69	43	0.94	24	14	16
2D051-8-4	M14 X 1,5	8	1/4	1.81	46	0.98	25	17	17
2D051-10-5	M16 X 1,5	10	5/16	2.05	52	1.02	26	17	29
2D051-10-6	M16 X 1,5	10	3/8	2.32	59	1.18	30	17	22
2D051-12-6	M18 X 1,5	12	3/8	2.32	59	1.18	30	19	22
2D051-15-8	M22 X 1,5	15	1/2	2.60	66	1.34	34	22	27
2D051-18-12	M26 X 1,5	18	3/4	2.83	72	1.26	32	27	35
2D051-22-12	M30 X 2	22	3/4	2.95	75	1.38	35	30	35
2D051-28-16	M36 X 2	28	1	3.31	84	1.50	38	36	43

Parker 2D251 Field Attachable Fittings

Stud DIN 20078 Heavy Series

For available sizes, refer to the table below.

Steel Part Number	Thread Size	Tube O.D.	Hose I.D.	A		Cutoff Allow. B		H Hex	W Hex
Hose Fitting		mm	inch	inch	mm	inch	mm	mm	mm
2D251-8-3 (+)	M16 X 1,5	8	3/16	1.85	47	1.06	27	17	16
2D251-10-4 (+)	M18 X 1,5	10	1/4	2.09	53	1.10	28	19	17
2D251-12-5 (+)	M20 X 1,5	12	5/16	2.17	55	1.06	27	22	29
2D251-12-6	M20 X 1,5	12	3/8	2.48	63	1.34	34	22	22
2D251-14-6	M22 X 1,5	14	3/8	2.52	64	1.38	35	22	22
2D251-16-8	M24 X 1,5	16	1/2	2.83	72	1.57	40	24	27
2D251-20-12	M30 X 2	20	3/4	3.15	80	1.57	40	30	35
2D251-25-12	M36 X 2	25	3/4	3.31	84	1.73	44	36	35
2D251-30-16	M42 X 2	30	1	3.78	96	1.97	50	46	43