Is the ORFS plug with GW UNF in stainless steel, type VKA (AISI 316) compatible with standard hydraulic ORFS ports and does it seal on the front surface?

Yes. The ORFS plug with GW UNF in stainless steel, type VKA is compatible with standard hydraulic ORFS (O-Ring Face Seal) ports. It features an internal UNF thread and is designed to seal on the front surface against the port face using the ORFS sealing principle (face-to-face contact with an O-ring). Made of AISI 316 stainless steel, the plug is suitable for typical ORFS applications and provides corrosion resistance and durable sealing performance when installed into a matching ORFS port with the correct O-ring.

Does the ORFS plug with GW UNF in stainless steel, type VKA provide front-surface sealing under high-pressure hydraulic conditions?

Yes. The ORFS plug with GW UNF in stainless steel, type VKA is designed for front-surface sealing: it is a blind cap with internal UNF thread that seals on the front face. Made of AISI 316 stainless steel, it is suitable for high-pressure hydraulic applications when used within its rated pressure and installation specifications. Ensure correct torque, intact sealing face, and compatibility with the mating ORFS male fitting and fluid to achieve reliable high-pressure front-surface sealing.

Can the ORFS plug with GW UNF in stainless steel, type VKA (AISI 316) be used with metric-thread adapters?

No. The ORFS plug with GW UNF in stainless steel, type VKA is made with an internal UNF (Unified National Fine) thread and a front-face ORFS sealing surface. Metric-thread adapters use ISO metric threads with different pitch, diameter tolerances and flank angle; they are not compatible with UNF threads. Trying to mate the ORFS plug with GW UNF in stainless steel, type VKA to a metric-thread adapter will result in improper fit, potential cross-threading, loss of mechanical strength and failure of the sealing interface. Use an adapter specifically machined to UNF male thread matching the ORFS plug, or choose a metric-bodied adapter that provides a correct UNF threaded port or a proper transitional adapter certified for hydraulic use.

Cap ORFS with UNF female of stainless steel, type VKA

Additional information

Material	SS – stainless steel
Standard length [m]	2, 3

Cap (plug) ORFS with UNF female thread (sealing on the face surface), type VKA. Material: AISI 316.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
HO-VKA-09-SS	Cap female ORFS 9/16"-18, SS	-	630	In stock	Enquiry
HO-VKA-11-SS	Cap female ORFS 11/16"-16, SS	-	630	In stock	Enquiry
HO-VKA-13-SS	Cap female ORFS 13/16"-16, SS	-	630	In stock	Enquiry
HO-VKA-16-SS	Cap female ORFS 1"-14, SS	-	420	In stock	Enquiry
HO-VKA-19-SS	Cap female ORFS 1.3/16"-12, SS	-	420	In stock	Enquiry
HO-VKA-23-SS	Cap female ORFS 1.7/16"-12, SS	-	420	In stock	Enquiry
HO-VKA-27-SS	Cap female ORFS 1.11/16"-12, SS	-	280	In stock	Enquiry
HO-VKA-32-SS	Cap female ORFS 2"-12, SS	-	280	In stock	Enquiry