Cold Headers
Cold Headers
5514 N. Elston Ave
Chicago, IL 60630
Phone: 1-773-775-7900
Fax: 1-773-775-0779
Email: sales@coldheaders.com
Website: www.coldheaders.com
Working Hours: Mon - Fri 8:00am - 4:30pm CST
Saturday - Sunday CLOSED If you have any questions, please call or email us.
Print Back

Socket Pipe Plugs

Socket pipe plugs are internally driven threaded plugs designed to close threaded pipe openings in fluid handling systems, pneumatic equipment, hydraulic assemblies, valves, pumps, manifolds, and industrial machinery. Their internal hex drive allows installation and removal using standard hex keys or hex bits while maintaining a compact profile that is suitable for applications where external wrench clearance is limited.

Socket pipe plugs are commonly specified for industrial machinery, hydraulic systems, pneumatic equipment, pumps, valves, process equipment, maintenance repairs, instrumentation, automation equipment, and OEM manufacturing. Their internally driven design provides convenient installation in recessed locations while allowing future removal when servicing or modifying equipment.

Proper pipe plug selection should consider thread size, thread type, installation method, mating component, operating environment, and system requirements. Individual product pages provide verified thread sizes and dimensional information where available to assist engineers, maintenance professionals, and purchasing teams in selecting the appropriate pipe plug.

Cold Headers supplies socket pipe plugs in a broad range of sizes, including standard and difficult-to-source configurations. Our catalog is organized to simplify exact-size sourcing while providing consistent engineering information across every product family.

Why Choose Socket Pipe Plugs?

  • Internal hex drive: Allows installation using standard hex keys or hex bits.
  • Compact design: Well suited for recessed installations and applications with limited wrench clearance.
  • Industrial applications: Commonly used in hydraulic systems, pneumatic equipment, pumps, valves, manifolds, and machinery.
  • Serviceable design: Allows removal for maintenance, inspection, or system modification.
  • Verified engineering dimensions: Product pages provide thread size and additional dimensional information where available.

Selecting the Correct Socket Pipe Plug

Begin by confirming the required thread size and thread type. Review installation clearance, mating component requirements, operating environment, and service conditions before selecting a pipe plug. Final selection should reflect the functional requirements of the completed assembly.

Cold Headers Inc. has supplied specialty industrial fasteners and related products since 1962. Our catalog helps engineers, distributors, maintenance professionals, and purchasing teams locate exact sizes and difficult-to-find industrial fastening products without unsupported inventory claims.

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.

hex-socket-pipe-plug.png
Unit of Measure
Items hex-socket-pipe-plug.png
1/16 Socket Pipe Plug 3/4T
1/16 Dryseal Socket Pipe Plug (3/4 Taper)
List Price (per 100 pieces) $12.00
 hex-socket-pipe-plug.png
1/8 Socket Pipe Plug 3/4T
1/8 Dryseal Socket Pipe Plug (3/4 Taper)
List Price (per 100 pieces) $14.00
 hex-socket-pipe-plug.png
1/4 Socket Pipe Plug 3/4T
1/4 Dryseal Socket Pipe Plug (3/4 Taper)
List Price (per 100 pieces) $15.00
 hex-socket-pipe-plug.png
3/8 Socket Pipe Plug 3/4T
3/8 Dryseal Socket Pipe Plug (3/4 Taper)
List Price (per 100 pieces) $20.00
 hex-socket-pipe-plug.png
1/2 Socket Pipe Plug 3/4T
1/2 Dryseal Socket Pipe Plug (3/4 Taper)
List Price (per 100 pieces) $35.00
Description N/A

1/16 Dryseal socket pipe plug opens a tapered internal-hex closure for unused ports in hydraulic and pneumatic equipment. Dryseal threads use the NPT size naming system, but selection should follow the specified NPTF thread form.

Pneumatic equipment, air-prep assemblies, and control blocks often need a compact plug that can be installed from the socket. Cold Headers has supplied specialty socket fasteners since 1962 and helps source hard-to-find small pipe plug sizes.

Technical Highlights

  • Style: Socket pipe plug, internal hex drive
  • Material: Alloy Steel
  • Pipe Thread Size: 1/16-27 taper pipe thread
  • Seal Style: Dryseal (NPTF) - seals without sealant
  • Taper: 3/4 in. per ft
  • Overall Length: 5/16 in.

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.

 		N/A

1/8 Dryseal socket pipe plug is the 3/4T alloy steel style for sealing a taper pipe port from the hex socket side. The 3/4T series is chosen when the Dryseal thread form is specified for metal-to-metal thread sealing.

Machine-tool coolant galleries and lubrication passages need plugs that can be serviced without adding external head clearance.

Technical Highlights

  • Style: Socket pipe plug, internal hex drive
  • Material: Alloy Steel
  • Pipe Thread Size: 1/8-27 taper pipe thread
  • Seal Style: Dryseal (NPTF) - seals without sealant
  • Taper: 3/4 in. per ft
  • Overall Length: 5/16 in.

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.

 		N/A

1/4 Dryseal socket pipe plug gives a compact internal-hex plug for manifolds, valves, pumps, and reservoir ports. Use this series when the drawing calls out a Dryseal socket pipe plug rather than another taper style.

Industrial manifolds, blocks, and cast housings use alloy steel pipe plugs where the print calls for an internal hex drive.

Technical Highlights

  • Style: Socket pipe plug, internal hex drive
  • Material: Alloy Steel
  • Pipe Thread Size: 1/4-18 taper pipe thread
  • Seal Style: Dryseal (NPTF) - seals without sealant
  • Taper: 3/4 in. per ft
  • Overall Length: 7/16 in.

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.

 		N/A

3/8 Dryseal socket pipe plug fits the standard 3/4 in. per ft taper series where the thread form provides metal contact sealing. The internal hex leaves the plug face clean while the taper pipe thread performs the sealing function.

Pump and gearbox housings use pipe plugs to close drain, fill, inspection, or machining ports after assembly.

Technical Highlights

  • Style: Socket pipe plug, internal hex drive
  • Material: Alloy Steel
  • Pipe Thread Size: 3/8-18 taper pipe thread
  • Seal Style: Dryseal (NPTF) - seals without sealant
  • Taper: 3/4 in. per ft
  • Overall Length: 1/2 in.

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.

 		N/A

1/2 Dryseal socket pipe plug identifies the exact pipe size and overall length for a sealant-free NPTF-style closure. Dryseal threads use the NPT size naming system, but selection should follow the specified NPTF thread form.

Test ports and gauge fittings are commonly plugged during rebuilds when a temporary connection is removed.

Technical Highlights

  • Style: Socket pipe plug, internal hex drive
  • Material: Alloy Steel
  • Pipe Thread Size: 1/2-14 taper pipe thread
  • Seal Style: Dryseal (NPTF) - seals without sealant
  • Taper: 3/4 in. per ft
  • Overall Length: 9/16 in.

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
Brands N/A Cold Headers, Inc.
Standard Pipe Size N/A 1/16-27 x 5/16 in N/A 1/8-27 x 5/16 in N/A 1/4-18 x 7/16 in N/A 3/8-18 x 1/2 in N/A 1/2-14 x 9/16 in
Quantity N/A 100 N/A 100 N/A 100 N/A 100 N/A 50
Package Type N/A Box
Note N/A 3/4 Taper Per Foot N/A 3/4 Taper Per Foot N/A 3/4 Taper Per Foot N/A 3/4 Taper Per Foot N/A

3/4 Taper Per Foot