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3/8" MNPT 316 SS Hollow Hex Plug MPN:6 PHH-SS

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Brand: Parker
Part #: 6 PHH-SS
SKU
510-G3033563
$82.58 for Order Qty of 2
Regular Price $57.81 Special Price $41.29

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3/8" MNPT 316 SS Hollow Hex Plug

The Parker 6 PHH-SS is a versatile and durable hollow hex plug designed for demanding applications. Made from 316L stainless steel, it offers exceptional corrosion and pressure resistance, making it ideal for use in extreme temperatures and harsh environments. The plug's axial bore accommodates fittings or sensing lines, allowing for easy installation and maintenance. With a maximum operating pressure of 7,200 psi and a temperature range of -425 to 1200 °F, it's suitable for a wide range of industries, including oil and gas, chemical processing, and power generation. Its bright surface coating ensures a secure seal and long-lasting performance.

Top product features:

  • Material: 316L Stainless Steel for corrosion and pressure resistance
  • Fitting Shape: Hollow Hex Plug with an axial bore for venting or instrumentation
  • Hex Size/Drive Style: 5/16 inch hex external head for wrench installation

Top product applications:

  • Venting applications where a through-bore is required
  • Instrumentation and sensing line installations
  • High-pressure applications where a cored design is necessary

The PARKER - 6 PHH-SS is a hollow hex plug made from 316L stainless steel, hollow hex plug with an axial bore to accommodate fittings or sensing lines. It is threaded with a 3/8 inch -18 MNPT connection. Finish: Bright surface coating. The hollow design accommodates fittings or sensing lines through the internal passage. Maximum Operating Pressure: 7,200 psi and Operating Temperature Range: -425 to 1200 °F. It installs using a 5/16 inch hex drive and conforms to ANSI B31.1, ANSI B31.3, and ANSI B1.20.1 standards. Key Features:

  • Material: 316L Stainless Steel for corrosion and pressure resistance
  • Fitting Shape: Hollow Hex Plug with an axial bore for venting or instrumentation
  • Connection Type: 3/8 inch -18 MNPT threaded connection
  • Hex Size/Drive Style: 5/16 inch hex external head for wrench installation
  • Finish: Bright surface coating
  • Maximum Operating Pressure: 7,200 psi
  • Operating Temperature Range: -425 to 1200 °F
  • Overall Length: 7/16 inch
  • Outside Diameter: 5/8 inch
  • Standards Compliance: ANSI B31.1, ANSI B31.3, ANSI B1.20.1
  • Plug Construction: Cored design
  • Includes no pre-applied thread sealant or additional sealing components


Additional Information

  • Country of Origin: US
  • Drop Ship Item: No
  • Blind Ship Eligible: No
  • LTL Freight Required: No
  • Lead Time: Ships in 1 days
  • Minimum Order Quantity: 1
  • Unit of Measure: EA
  • Package Length: 3.70
  • Package Width: 2.80
  • Package Height: 1.10
  • Package Weight: 0.40
  • California Prop 65 Warning: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Product info last updated on February 16, 2026 6:33pm UTC Category: Pipes, Valves and Fittings
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In stock