Selection of the port connector

The correct stud connector

When selecting the type of male stud connectors the following must be considered:

Temperatures

Use seal based on elastomeric material, when the temperature allows this

Pressure

System pressure
Pressure surges

Type Male stud connector	with O-Ring (Type F)	with elastomeric seal (Type E)	with sealing edge (Type B)	with sealing ring (Type A)	with tapered thread (Type C)
Thread	Metric	Metric	Metric	Metric	Metric
Standard thread	M 16X1.5 DIN 13-21/-22	M 16X1.5 DIN 13-21/-22	M 16X1.5 DIN 13-21/-22	M 16X1.5 DIN 13-21/-22	M 16X1,5, tapered. DIN 158
Pressure resistance	++	++	++	+	+
Sealing performance	+++	+++	++	++	+
Sealing agent	Not required	Not required	Not required	Not required	Definitely required
Use	High pressure hydraulics	High pressure hydraulics, gaseous medium	Aggressive medium, extreme temperatures	Pneumatics	Limited requirements

Type Male stud connector	with O-Ring (Type F)	with elastomeric seal (Type E)	with sealing edge (Type B)	with sealing ring (Type A)	with tapered thread
Thread	UN/UNF thread	BSPP	BSPP	BSPP	BSPT
Standard thread	3/4 - 16 UNF ISO 725, ANSI B 1.1	G 1/4A DIN EN ISO 228-1	G1/4A DIN EN ISO 228-1	G1/4A DIN EN ISO 228-1	R1/4 (short)
Pressure resistance	++	++	++	+	+
Sealing performance	+++	+++	++	++	+
Sealing agent	Not required	Not required	Not required	Not required	Definitely required
Use	High pressure hydraulics	High pressure hydraulics, gaseous medium	Aggressive medium, extreme temperatures	Pneumatics	Limited requirements

Type Male stud connector	Male stud connector with tapered thread *	Male stud connector with tapered thread
Thread	BSPT	NPT
Standard thread	R1/4, DIN 2999-1 ISO 7	G1/2-14 NPT ANSI B1.20.1
Pressure resistance	+	+++
Sealing performance	+	+
Sealing agent	Definitely required	Definitely required
Use	Limited requirements

* Only upon special request

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