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Home / All / Threaded Flat Face Couplers / 297 Series | ISO 16028 VEP Threaded Flat Face Quick Coupling (Steel)

297 Series | ISO 16028 VEP Threaded Flat Face Quick Coupling (Steel)

Categories	Threaded Flat Face Couplers
Interchange	STUCCHI VEP-P SERIES
Interchange	PARKER FET SERIES
Interchange	FASTER FHV SERIES
Interchange	DNP PST4 SERIES
Interchange	VOSWINKEL FT SERIES
Interchange	DIXON VEP SERIES
Interchange	HOLMBURY HFT SERIES
Update Time	Sep 12,2025

Detail Information

297 Series

Threaded Flat Face Coupling (Steel)

ISO-16028 Standard, Connect Under Pressure

This EH series is interchangeable with STUCCHI VEP-P SERIES, PARKER FET SERIES, FASTER FHV SERIES, DNP PST4 SERIES, VOSWINKEL FT SERIES, DIXON VEP SERIES, and HOLMBURY HFT SERIES. Engineered for demanding hydraulic systems, the 297 Series provides reliable performance in applications subject to extreme pressure impulses and residual line pressures. The innovative thread-to-connect design significantly reduces wear and prevents brinelling, while the internal valve technology enables safe connection and disconnection even under high residual pressure conditions.

Female

Other Threads/Fitting Ends Are Available Upon Request
Art. No.	Body Size (inch)	E(mm)	Hs(mm)	Hq(mm)	Ls(mm)	T
HFSFC29738 -3/8"NPT	3/8''	41.8	S30	S38	70	3/8"NPT
HFSFC29738 -3/8"G	3/8''	41.8	S30	S38	70	3/8"BSPP
HFSFC29738 -1/2"NPT	3/8''	41.8	S30	S38	71.5	1/2"NPT
HFSFC29738 -1/2"G	3/8''	41.8	S30	S38	71.5	1/2"BSPP
HFSFC29712 -1/2"NPT	1/2''	49.8	S36	S46	78	1/2"NPT
HFSFC29712 -1/2"G	1/2''	49.8	S36	S46	78	1/2"BSPP
HFSFC29712-1- 1/16" UN	1/2''	49.8	S36	S46	85	1-1/16"UN-12
HFSFC29758- 3/4"NPT	5/8''	53.8	S41	S50	85	5/8"NPT
HFSFC29758-1- 1/16" UN	5/8''	53.8	S41	S50	85	1-1/16"UN-12
HFSFC29734- 1"NPT	3/4''	58.8	S46	S55	99	1"NPT
HFSFC29734-1"G	3/4''	58.8	S46	S55	99	1"BSPP
HFSFC29734-1- 1/16" UN	3/4''	58.8	S46	S55	99	1-1/16"UN-12
HFSFC29734-1- 5/16" UN	3/4''	58.8	S46	S55	99	1-5/16"UN-12
HFSFC29710-1- 1/4" NPT	1''	70	S55	S65	106	1-1/4"NPT
HFSFC29710-1- 1/4"G	1''	70	S55	S65	106	1-1/4"BSPP
HFSFC29710-1- 5/16" UN	1''	70	S55	S65	105	1-5/16"UN-12
HFSFC29710-1- 5/8" UN	1''	70	S55	S65	106	1-5/8"UN-12
HFSFC297112-1- 1/2" NPT	1-1/2''	92	S65	S85	133.5	1-1/2"NPT
HFSFC297112-1- 1/2"G	1-1/2''	92	S65	S85	133.5	1-1/2"BSPP
HFSFC297112-1- 5/8" UN	1-1/2''	92	S65	S85	133.5	1-5/8"UN-12
HFSFC297112-1- 7/8" UN	1-1/2''	92	S65	S85	133.5	1-7/8"UN -12

Male

Other Threads/Fitting Ends Are Available Upon Request
Art. No.	Body Size (inch)	N	M(mm)	Hp(mm)	Lp(mm)	T
HFSFP29738 -3/8"NPT	3/8''	M33x2	37.8	27	82.5	3/8"NPT
HFSFP29738-3/8"G	3/8''	M33x2	37.8	27	82.5	3/8"BSPP
HFSFP29738 -1/2"NPT	3/8''	M33x2	37.8	27	86	1/2"NPT
HFSFP29738 -1/2"G	3/8''	M33x2	37.8	27	86	1/2"BSPP
HFSFP29712 -1/2"NPT	1/2''	M40x3	45.8	36	97	1/2"NPT
HFSFP29712-1/2"G	1/2''	M40x3	45.8	36	97	1/2"BSPP
HFSFP29712 -1-1/16" UN	1/2''	M40x3	45.8	36	99	1-1/16"UN-12
HFSFP29758 -3/4"NPT	5/8''	M45x3	49.8	36	99	5/8"NPT
HFSFP29758 -1-1/16" UN	5/8''	M45x3	49.8	36	99	1-1/16"UN-12
HFSFP29734 -1"NPT	3/4''	M50x3	54.8	46	114	1"NPT
HFSFP29734-1"G	3/4''	M50x3	54.8	46	114	1"BSPP
HFSFP29734 -1-1/16" UN	3/4''	M50x3	54.8	46	114	1-1/16"UN-12
HFSFP29734 -1-5/16" UN	3/4''	M50x3	54.8	46	114	1-5/16"UN-12
HFSFP29710 -1-1/4" NPT	1''	M58x3	64.5	55	123.5	1-1/4"NPT
HFSFP29710 -1-1/4"G	1''	M58x3	64.5	55	123.5	1-1/4"BSPP
HFSFP29710 -1-5/16" UN	1''	M58x3	64.5	55	123.5	1-5/16"UN-12
HFSFP29710 -1-5/8" UN	1''	M58x3	64.5	55	123.5	1-5/8"UN-12
HFSFP297112 -1-1/2" NPT	1-1/2''	M80x4	89.8	65	150	1-1/2"NPT
HFSFP297112 -1-1/2"G	1-1/2''	M80x4	89.8	65	150	1-1/2"BSPP
HFSFP297112 -1-5/8" UN	1-1/2''	M80x4	89.8	65	150	1-5/8"UN-12
HFSFP297112 -1-7/8" UN	1-1/2''	M80x4	89.8	65	150	1-7/8"UN-12

Accessories

Dash Size	ISO Size	Art. No. Dust Cap For Coupler	Art. No. Dust Cap For Plug	Material
06	10	297-3/8-P-AL	297-3/8-C-AL	Aluminum
08	12.5	297-1/2-P-AL	297-1/2-C-AL	Aluminum
10	16	297-5/8-P-AL	297-5/8-C-AL	Aluminum
12	19	297-3/4-P-AL	297-3/4-C-AL	Aluminum
16	25	297-1-P-AL	297-1-C-AL	Aluminum
24	38	297-1-1/2-P-AL	297-1-1/2-C-AL	Aluminum

Technical Specifications

Dash Size	Body Size (Inch)	Max. Work PressureMale (bar)	Max. Work PressureFemale (bar)	Max. Work PressureCoupled (bar)	Min. Burst Pressure Male (bar)	Min. Burst Pressure Female (bar)	Min. Burst Pressure Coupled (bar)	Spillage (ml)
06	3/8''	550	330	550	1400	1000	1400	0.01
08	1/2''	550	330	550	1400	1000	1400	0.01
10	5/8''	550	330	550	1400	1000	1400	0.02
12	3/4''	500	330	500	1250	1000	1250	0.03
16	1''	470	300	470	1200	800	1200	0.03
20	1-1/4''	400	300	400	1100	800	1100	0.03

Material:	Steel
Seals:	NBR, Seals can be customized to meet your special work condition/media
Working Temperatures:	-25 °C to 125 °C, Customizable
Surface Treatment:	MATE 1000 (ZnNi)
Specifications:	Series Interchange:	STUCCHI VEP-P SERIES, PARKER FET SERIES, FASTER FHV SERIES, DNP PST4 SERIES, VOSWINKEL FT SERIES, DIXON VEP SERIES, HOLMBURY HFT SERIES
	Valve Type:	Flat
	Connection:	Screw to Connect
	Disconnection:	Unscrew to Disconnect
	Connection Under Pressure:	Allowed Up To Work Pressure