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

1/2-20UNF Extruder Rupture Disks

All Pressure Ranges & Lengths Ship from Stock!

Standard Lead Times


MPI’s ½”-20 UNF thread extruder rupture disks are built to the most common specifications used in the plastics industry and are compatible with Dynisco, Gefran, Oseco, and Fike units. The ½”-20 UNF thread  designs are commonly used on extruders manufactured in North America, Europe, and China.

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

  • Compatible with DyniscoGefran, GP50, Oseco, Fike
  • 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.)
  • Burst pressure ratings from 100 to 14,500psi (7–1000bar)
  • Burst disc size: 3/16” 
  • Burst temperature ranges to 1,000°F (538°C)
  • Burst tolerance: ±5%
  • 100% factory leak tested (to 70% rating)
  • 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