Threading Inserts BSPT EXTERNAL B.S. 21: 1985BSPT NUT R 0.137P A L BA 27.5° 27.5° I.C. L R 0.137P 1°47' 90° BSPT SCREW B T I.C. VERTICAL STANDARD STANDARD PITCH CATALOG NUMBER DIMENSIONS TPI RIGHT HAND LEFT HAND Lmm I.C. A B 28 BSPT 28 ER11 BSPT 28 EL11 0.7 0.6 19 BSPT 19 ER11 BSPT 19 EL11 11 6.35 0.8 0.9 14 BSPT 14 ER11 BSPT 14 EL11 0.9 1.0 28 BSPT 28 ER16 BSPT 28 EL16 0.6 0.6 19 BSPT 19 ER16 BSPT 19 EL16 0.8 0.9 16 9.525 14 BSPT 14 ER16 BSPT 14 EL16 1.0 1.2 11 BSPT 11 ER16 BSPT 11 EL16 1.1 1.5 VERTICAL INSERTS PITCH CATALOG NUMBER DIMENSIONS TPI RIGHT HAND Lmm I.C. A B T 28 BSPT28 ER16V 1.1 0.8 3.7 19 BSPT19 ER16V 1.1 1.0 3.7 16 9.525 14 BSPT14 ER16V 1.1 1.2 3.7 11 BSPT11 ER16V 1.1 1.5 3.7 26