2a single mounting facility thread class 0.375" single mounting facility thread length 4.625" overall length 1.625" overall width each section rear has 4 dummy lugs circular wafer, bushing mount unef single mounting facility thread series
2a single mounting facility thread class 0.250" single mounting facility thread length 2.224" overall length 1.609" overall width circular wafer, bushing mount unef single mounting facility thread series