CAT - THERMAL SHRINK HOLDER Taper Size CAT-40 A ➚ A .0001 AT3 Taper 50-52 HRc Ra 4µin 1.752 Lmax G2.5 D1 Lmin 25,000 RPM 4° G d D J L3 L2 L1 CARBIDE ONLY L Designation d D D1 L L1 L2 L3 Lmin Lmax J G Hex Key* CAT40 SRK 1/8x2.000 .125 .394 .591 3.380 2.630 2.000 1.400 .394 .630 M6 5/8-11 3 CAT40 SRK 1/8x3.250 .125 .394 .748 4.630 2.880 3.250 2.526 .394 .630 M6 5/8-11 3 CAT40 SRK 3/16x2.000 .188 .394 .591 3.380 2.630 2.000 1.400 .591 .827 M6 5/8-11 3 CAT40 SRK 3/16x3.250 .188 .394 .748 4.630 2.880 3.250 2.526 .591 .827 M6 5/8-11 3 CAT40 SRK 1/4x2.000 .250 .433 .630 3.380 2.630 2.000 1.398 .709 .945 M8 5/8-11 4 CAT40 SRK 1/4x3.250 .250 .433 .787 4.630 2.880 3.250 2.524 .709 .945 M8 5/8-11 4 CAT40 SRK 5/16x2.000 .313 .551 .787 3.380 2.630 2.000 1.673 .984 1.220 M10 5/8-11 5 CAT40 SRK 5/16x3.250 .313 .551 .906 4.630 2.880 3.250 2.518 .984 1.220 M10 5/8-11 5 CAT40 SRK 3/8x2.000 .375 .630 .866 3.380 2.630 2.000 1.669 1.181 1.417 M12 5/8-11 6 CAT40 SRK 3/8x3.250 .375 .630 .965 4.630 2.880 3.250 2.373 1.181 1.417 M12 5/8-11 6 CAT40 SRK 7/16x2.000 .438 .787 1.024 3.380 2.630 2.000 1.665 1.220 1.614 M10 5/8-11 5 CAT40 SRK 7/16x3.250 .438 .787 1.102 4.630 2.880 3.250 2.228 1.220 1.614 M10 5/8-11 5 CAT40 SRK 1/2x2.000 .500 .787 1.024 3.380 2.630 2.000 1.665 1.260 1.654 M10 5/8-11 5 CAT40 SRK 1/2x3.250 .500 .787 1.102 4.630 2.880 3.250 2.228 1.260 1.654 M10 5/8-11 5 * Metric 784