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Heaters, Sensors, Controllers, Relays, Linear Displacement, and Leadwire

1"-20 UNF Extruder Rupture Disks

All Pressure Ranges & Lengths Ship from Stock!

Standard Lead Times


MPI’s 1”-20 UNF thread extruder rupture disks are built to the plastic industry’s most commonly used specifications, and are compatible with Dynisco, Gefran, Oseco and Fike units. These disks are often used on larger North American-manufactured extruders that require a larger rupture disk size to allow larger plastic discharge during safety relief.

As it maintains excellent stability over a wide temperature range, Inconel is our standard rupture disk material. However, other materials are available for special applications. Contact us to discuss your material requirements.

Request a quote on extruded rupture disks for your application, or contact MPI for more information.

  • Compatible with DyniscoGefran, GP50, Osceco, Fike
  • Burst pressure ratings from 100 to 14,500psi (7–1000bar)
  • Burst disc size: 1/2” 
  • Burst temperature ranges to 1,000°F (538°C)
  • Burst tolerance: ±5%
  • 100% factory leak tested (to 70% rating)
  • Welded one-piece assembly
  • Ends available: hex, NPT, wrench flat, screwdriver slot
  • Standard Inconel disks provide stability over a wide temperature range
  • Standard 300 series stainless steel body (optional Inconel, Hastelloy, etc.)
  • Engineering tech support available by email or phone                    
  • Large inventory of same day shipping items
  • Quick delivery on custom products 
Datasheet / Manual
Burst Indicator

Other Mounting Threads

1/2"-20UNF Thread

2", 3", 4", 6", 8", 10", 12" Lengths

5/8”-11 UNC Extruder Rupture Disks

5/8"-11UNC Thread

5", 7", 9" Lengths

3/4”-16 UNF Extruder Rupture Disks

3/4"-16UNF Thread

Standard & Recessed Threads