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M17/RG-400 High Temp Coaxial Cable – MIL-Spec 50 Ohm PTFE Coax for RF Systems

M17/RG-400 is a high-performance, double-shielded 50 Ohm coaxial cable built to MIL-DTL-17 specifications. Known for its excellent thermal stability and mechanical durability, it is widely used in military, aerospace, and RF test environments. It features a PTFE dielectric and FEP jacket, offering high-temperature resilience and resistance to chemicals and abrasion.

Key Features of M17/RG-400 High Temp Coax

  • ✅ Operating temperature: -55°C to +200°C
  • ✅ Silver-plated copper center conductor (0.039" / 19 AWG)
  • ✅ PTFE dielectric with FEP jacket – overall diameter: 0.195" (4.95 mm)
  • ✅ Double silver-plated copper braid shield (minimum 95% combined coverage)
  • ✅ Impedance: 50 ±2 Ohms
  • ✅ Capacitance: 29.4 pF/ft
  • ✅ Voltage rating: 1,900 VRMS
  • ✅ Attenuation @ 1 GHz: ~16.4 dB/100 ft

Applications for M17/RG-400 Coax

  • ✅ RF interconnects in avionics and military-grade electronics
  • ✅ High-reliability test setups and measurement systems
  • ✅ EMI-sensitive environments requiring enhanced shielding
  • ✅ Aerospace and industrial RF harnessing

M17/RG-400 coax offers a flexible, shielded solution for demanding RF systems. Its MIL-qualified construction ensures durability in harsh electrical and environmental conditions.

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High Temp M17-RG400 Coax 25 FT
Our price: $91.59
Sale Price: $90.17
Savings: $1.42
High Temp M17-RG400 Coax 50 FT
Our price: $183.18
Sale Price: $180.34
Savings: $2.84
M17/128-RG400 Made up of  9/.0080 silver-coated copper conductor with a polytetrafluoroethylene (PTFE) dielectric, fluorinated ethylene propylene (FEP) jacket, and 2 overall shields of 36 AWG silver-coated copper braid shields. M17/128-RG400 Made up of  9/.0080 silver-coated copper conductor with a polytetrafluoroethylene (PTFE) dielectric, fluorinated ethylene propylene (FEP) jacket, and 2 overall shields of 36 AWG silver-coated copper braid shields. M17/128-RG400 Made up of  9/.0080 silver-coated copper conductor with a polytetrafluoroethylene (PTFE) dielectric, fluorinated ethylene propylene (FEP) jacket, and 2 overall shields of 36 AWG silver-coated copper braid shields.
High Temp M17-RG400 High Temp M17-RG400 High Temp M17-RG400
High Temp M17-RG400 Coax 75 FT
Our price: $274.77
Sale Price: $270.51
Savings: $4.26
High Temp M17-RG400 Coax 100 FT
Our price: $366.36
Sale Price: $360.68
Savings: $5.68
High Temp M17-RG400 Coax 125 FT
Our price: $457.95
Sale Price: $450.85
Savings: $7.10
M17/128-RG400 Made up of  9/.0080 silver-coated copper conductor with a polytetrafluoroethylene (PTFE) dielectric, fluorinated ethylene propylene (FEP) jacket, and 2 overall shields of 36 AWG silver-coated copper braid shields. M17/128-RG400 Made up of  9/.0080 silver-coated copper conductor with a polytetrafluoroethylene (PTFE) dielectric, fluorinated ethylene propylene (FEP) jacket, and 2 overall shields of 36 AWG silver-coated copper braid shields. M17/128-RG400 Made up of  9/.0080 silver-coated copper conductor with a polytetrafluoroethylene (PTFE) dielectric, fluorinated ethylene propylene (FEP) jacket, and 2 overall shields of 36 AWG silver-coated copper braid shields.
High Temp M17-RG400 High Temp M17-RG400 High Temp M17-RG400
High Temp M17-RG400 Coax 150 FT
Our price: $549.54
Sale Price: $541.02
Savings: $8.52
High Temp M17-RG400 Coax 175 FT
Our price: $641.13
Sale Price: $631.19
Savings: $9.94
High Temp M17-RG400 Coax 200 FT
Our price: $732.72
Sale Price: $721.36
Savings: $11.36
M17/128-RG400 Made up of  9/.0080 silver-coated copper conductor with a polytetrafluoroethylene (PTFE) dielectric, fluorinated ethylene propylene (FEP) jacket, and 2 overall shields of 36 AWG silver-coated copper braid shields. M17/128-RG400 Made up of  9/.0080 silver-coated copper conductor with a polytetrafluoroethylene (PTFE) dielectric, fluorinated ethylene propylene (FEP) jacket, and 2 overall shields of 36 AWG silver-coated copper braid shields. M17/128-RG400 Made up of  9/.0080 silver-coated copper conductor with a polytetrafluoroethylene (PTFE) dielectric, fluorinated ethylene propylene (FEP) jacket, and 2 overall shields of 36 AWG silver-coated copper braid shields.