Threaded Hydraulic Caps & Plugs

Caps’n Plugs carries a variety of threaded caps, plugs and other hydraulic parts available in polyethylene or aluminum to protect threaded fittings from dirt or contamination.

HB Hose Bend Restrictors

Information

Tapered design reduces bending stress near the hose-coupling junction, thereby preventing damage and extending the life of the hose. The upper lip firmly attaches to the coupling, holding the restrictor in place and eliminating the use of costly adhesives or clamps. Designed to extend the life of a variety of hydraulic and pressure-washer hoses. 

Material: Vinyl

Colour: Black and Red

Description Typically used to reduce the bending stress near the hose-coupling junction, these durable add-ons remove the need for costly adhesives or clamps, extending the life of a variety of hydraulic and pressure-washer hoses.

Inverted Flared-Fitting Plugs HT Series

Information

Designed to protect inverted flare fittings. Engineered with knurled head for ease of application. Will meet low-pressure testing requirements. 

Material: Low Density Polyethylene

Colour: Red

Description Built with a knurled head for easy application, these inverted fitting plugs are designed to protect inverted flare fittings. Various sizes available.

Threaded Plugs TP Series

Information

Ideal for low-pressure testing and in-house handling. Square-head design makes for easy application. Protects threaded ports against contaminates and moisture. Resists oil and heat up to 250°F. Not for permanent applications. 

Material: High Density Polyethylene

Colour: Black

Description Built with a square head for easy application, these threaded plugs protect ports against contamination and are ideal for low-pressure testing and in-house handling. Various sizes available.

Flared Fitting Threaded Aluminum Plugs ASP Series

Information

Designed for protection of 37° flared fittings and straight-threaded ports, series ASP plugs have a nose section that seals on flared fittings without a gasket. The optional ASP-GN series has an added neoprene shoulder gasket for low-pressure sealing of threaded ports. Special gaskets are also available in Butyl or Buna N rubber. Note: Standard ASP Plugs listed below do not include gasket. 

Material: Aluminum

Description Specifically designed to protect 37° flared fittings and straight-threaded ports, these aluminum alloy ASP plugs are built with a nose section that seals on flared fittings without a gasket. Various sizes available.

Thread Plugs TF Series

Information

General purpose threaded plug that can be utilized for a variety of different applications. Series can be tightened by hand, hex wrench or screwdriver. Will meet low-pressure testing requirements. 

Material: Low Density Polyethylene

Colour: Red

Description This general purpose polypropylene threaded plug is used in a variety of applications and can be tightened by hand. Various sizes available.

Flareless Threaded Aluminum Plugs ADP Series

Information

Series ADP Plugs have a dimpled nose section that forms a low pressure seal with flareless tube ends. The addition of a neoprene shoulder gasket enables the ADP-GN to provide a positive seal on the spot face of the O-ring port. Gaskets are also optionally available in Butyl or Buna N rubber. Contact factory for prices.

Material: Aluminum

Description The ADP series threaded aluminum plugs offer a dimpled nose section to form a low-pressure seal with tube ends and hose assemblies.

Flat Faced Threaded Aluminim Plugs for AFO Series

Information

Designed to fit Flat-Faced O-Ring fittings for a positive metal to metal thread protection and seal.  These plugs are available with an optional sealing gaskets available in either Butyl or Buna N rubber.  

Material: Aluminum

Description Built for positive, metal to metal threaded protection of fluid lines and fittings, these aluminum plugs also have optional neoprene gaskets, which are available in Butyl or Buna N Rubber. Various sizes available.

Flared Fitting Threaded Aluminum Cap ASC Series

Information

A standard aerospace and fluid power protective cap, the Series ASC has a nose section design that forms a low pressure seal on threaded, flared fittings. A more positive seal is possible with the addition of a sealing disc (Series ASC-DN). Stock sealing discs are neoprene; Butyl or Buna N rubber are also available. 

Material: Aluminum

Description The ASC Series threaded aluminum caps for threaded flared fittings are designed with a nose-section that forms a low-pressure seal. Optional sealing discs for a positive seal available.

Finishing Flanges

Information

Low-cost replacement for metal flanges used in plumbing, water heaters, refrigeration and machinery industries. Durable and non-corroding for a long-lasting, attractive, finished appearance.

Material: Low Density Polyethylene

Colour: White

Description Most frequently used in plumbing, water heaters, refrigeration and machinery industries, these low-cost replacements for metal flanges provide a durable and long-lasting finish. Multiple sizes available.

Hose Collars

Information

Hose Collars are used to protect hydraulic hose ends during hose assembly manufacturing.

Material: Low Density Polyethylene

Colour: Orange

Description Designed as a hose and tube-end cover, these flanged washers prevent working fluid from leaking after implementation and are extra thick for heavy-duty applications. Multiple sizes available.

Flat-Face O-Ring Plugs PDF Series

Information

Designed specifically to protect flat-face o-ring fittings. Widely used in the hydraulic and pneumatic industries. Head design allows for easy mechanical and hand installation.

Material: Low Density Polyethylene

Colour: Red

Description Typically used the hydraulic and pneumatic industries, these flat-faced O-ring fittings are made from polyethylene and can be installed by hand or mechanically. Various sizes available.

Threaded Cap (straight) TC Series

Information

Designed to protect straight threads on studs and fittings. Rolled threads allow you to either push or thread on. Tight seal makes an ideal mask for painting or plating, as well as a deterrent for contaminates. 

Material: Low Density Polyethylene

Colour: Orange

Description Ideal for masking during painting or plating applications, these threaded caps protect straight threads and fittings and deter contaminates. Various sizes available.

Threaded Plugs TH Series

Information

Socket design allows for threads to be protected during low-pressure testing and in-plant processing. Commonly used to keep contaminates and moisture from threaded port. Oil and heat resistant to 250°. Not for permanent application.

Material: High Density Polyethylene

Colour: Black

Description Typically used to keep contaminants and moisture from ports, these threaded plugs are built with a socket design for thread protection during pressure testing and in-plant processing. Various sizes available.

Unified Sealing Plug UT Series

Information

Designed to protect unified/straight threaded ports. Each plug features a unique and integral Tight Fit™ sealing lip along with five complete threads. This design prevents contaminants from entering or fluids from escaping fittings or ports... without the need of an o-ring. UT Series can be applied or removed with a screwdriver, socket wrench, power tool or by hand.

Material: Low Density Polyethylene

Colour: Red

Description Designed with a unique Tight Fit™ sealing lip along with five complete threads, this unified sealing plug prevents contamination in ports, without the need of an o-ring. Various sizes available.

SAE O-Ring Port Plugs PDO Series

Information

Series PDO Plugs provide positive sealing for SAE-straight-threaded O-ring type ports and MIL-MS 33649 bosses on fluid power components. Integral O-ring type bead seals in the bevel of the port to prevent oil leakage or entrance of contaminants. Seal at outside of knurl protects port face against paint and dirt.

Material: Low Density Polyethylene

Colour: Red

Description Prevent oil leakage or contamination of your SAE straight-threaded O-Ring type ports and MIL-MS-33649 bosses on fluid power components with these knurled polyethylene plugs. Various sizes available.

Threaded Plugs TP-F Series

Information

Flange design allows plug to protect circumference of port while protecting threads from contaminated and moisture. Commonly used during low-pressure testing and in-plant processing. Combats oil and heat up to 250°F. Not for permanent applications. Applicible for NPT Threads. 

Material: High Density Polyethylene

Colour: Black

Description Commonly used during low-pressure testing and in-plant processing, these threaded plugs are built with a flange design to protect the circumference of the port while protecting threads from contamination and moisture. Various sizes available.

Flareless Tube and Nut Assembly Plugs PDE Series

Information

Knurled for ease of application, Series PDE Plugs are designed to fit MS-21921 tube and nut assemblies interchangeably. They can be installed with light finger tightening to seal beyond normal requirements. 

Material: Low Density Polyethylene

Colour: Red

Description These polyethylene plastic plugs can be hand-tightened and will fit both MS-21921 tube and nut assemblies. Various sizes available.