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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: $145.26
Sale Price: $140.03
Savings: $5.23
High Temp M17-RG400 Coax 50 FT
Our price: $290.51
Sale Price: $280.06
Savings: $10.45
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: $435.76
Sale Price: $420.09
Savings: $15.67
High Temp M17-RG400 Coax 100 FT
Our price: $581.02
Sale Price: $560.12
Savings: $20.90
High Temp M17-RG400 Coax 125 FT
Our price: $726.28
Sale Price: $700.15
Savings: $26.13
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: $871.53
Sale Price: $840.18
Savings: $31.35
High Temp M17-RG400 Coax 175 FT
Our price: $1,016.78
Sale Price: $980.21
Savings: $36.57
High Temp M17-RG400 Coax 200 FT
Our price: $1,162.04
Sale Price: $1,120.24
Savings: $41.80
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.