McFarlane Aviation Products FAA-PMA Replacement Aircraft Parts

Exhaust Nuts and Studs

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Save money and get an enhanced product with McFarlane Stainless Steel Exhaust Nuts and Studs! A heat-treated, high-strength stainless alloy improvement, these nuts and studs are nitrocarburized Black Max™ coated for additional corrosion protection and resistance to galling. Reduce the temperature flux stress on your exhaust flanges and gaskets with these FAA-PMA approved nuts and studs for Continental and Lycoming Engines. 

The stainless-steel stud and nut set are rust proof, high-strength, reusable fasteners for use on Continental and Lycoming engines. The studs are tap-end studs that come in various oversized options. The self-locking nuts provide a vibration resistant fastening action that will stay tight between inspections.



Exhaust Studs

  • Lasts much longer! Save $$$ and labor!
  • Less stress on the exhaust flanges and gaskets as the engine heats up and cools down
  • Studs are nitrocarburized Black Max™ coating to resist galling and corrosion
  • Black Max™ prevents galvanic corrosion between stainless and aluminum cylinder



Exhaust Nuts

  • Heat-treated, high-strength stainless alloy
  • Steel nuts are cad plated - better on galvanized and stainless studs
  • Won't rust and are reusable



These are the good ones!



More Exhaust System Components available. 

Part Number Description Your Price Stock
MC25C-8 STUD, 1/4-20X1/4-20X1 $12.12
MC25C-8P03 STUD, 1/4-20X1/4-20X1 $26.45
MC25C-8P07 STUD, 1/4-20X1/4-20X1O07 $28.65
MC25C-8P12 STUD, 1/4-20X1/4-20X1O12 $89.01
MC25C-10 STUD, 1/4-20X1/4-20X1-1/4 $12.16
MC25C-10P03 STUD, 1/4-20X1/4-20X1-1/4O03 $14.79
MC25C-10P07 STUD, 1/4-20X1/4-20X1-1/4O07 $66.26
MC25C-10P12 STUD, 1/4-20X1/4-20X1-1/4O12 $55.65
MC25C-11 STUD, 1/4-20X1/4-20X1-3/8 $13.73
MC25C-11P03 STUD, 1/4-20X1/4-20X1-3/8O03 $26.45
MC25C-11P07 STUD, 1/4-20X1/4-20X1-3/8O07 $41.04
MC25C-11P12 STUD, 1/4-20X1/4-20X1-3/8O12 $57.10
MC31-10 STUD, 5/16-18X5/16-24X1-1/4 $15.85
MC31-10P03 STUD, 5/16-18X5/16-24X1-1/4O03 $15.85
MC31-10P07 STUD, 5/16-18X5/16-24X1-1/4O07 $31.75
MC31-10P12 STUD, 5/16-18X5/16-24X1-1/4O12 $31.75
MC31-12 STUD, 5/16-18X5/16-24X1-1/2 $13.73
MC31-12P03 STUD, 5/16-18X5/16-24X1-1/2O03 $20.09
MC31-12P07 STUD, 5/16-18X5/16-24X1-1/2O07 $42.35
MC31-12P12 STUD, 5/16-18X5/16-24X1-1/2O12 $42.20

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