Used on type an/spq-5. 2a single mounting facility thread class 1.650" overall length 1.430" overall width 32 single mounting facility thread quantity per inch unc single mounting facility thread series
Used on type an/urd-4. 2b single mounting facility thread class 2.880" overall length 1.880" overall width 32 single mounting facility thread quantity per inch unc single mounting facility thread series