Example: CUBE 1.5 D 2 Y4 1SEC CUBE 1.5 = 1-1/2" Cube D = finished front, right, and base 2 = two holes located in corners of the cube (See Pattern Table for hole location) Y4 = .266 Dia. thru hole with .40 Dia C'Bore for 1/4' cap screw For 1.5" cube, C'Bore depth = .75" (See Pattern Table) 1SEC = finished sides orthogonal to 1 second accuracy Hole Pattern Dimensions and Hole Types Dimensions are shown in Inches. Hole Pattern-1 Hole Pattern-2 Hole Pattern-3 Hole Pattern-4 CUBE .50 Min. Good Thread .28 T1 S1 T2 S2 U0 U1 U2 U3 V0 V1 C'Bore Depth = .20" Y0 Y1 Y2 CUBE .75 Min. Good Thread .40 T1 S1 T2 S2 U1 U2 U3 U4 V1 V2 V3 V4 C'Bore Depth = .38" Y1 Y2 Y3 15 64 15 64 15 64 15 64 9 32 9 32 Min. Good Thread .40 T1 S1 T2 S2 U1 U2 U3 C'Bore Depth = .38" Y1 CUBE .95 .266 Dia. Thru Hole 72° C-Sink. Min. 100" Deep for #8 Flat Head Screw CUBE 1.0 Min. Good Thread .50 T2 S2 T3 S3 T4 S4 U2 U3 U4 V2 V3 V4 C'Bore Depth = .50" Y2 Y3 Y4 1 4 1 4 1 4 1 4 1 2 1 2 Min. Good Thread .50 T2 S2 T3 S3 U2 U3 U4 C'Bore Depth = .50" Y2 1 4 .283 3 8 .283 .50 BCD Min. Good Thread .50 T2 S2 T3 S3 U2 U3 U4 C'Bore Depth = .50" Y2 1 4 1 4 1 4 1 4 1 2 1 2 Min. Good Thread .50 T2 S2 T3 S3 U2 U3 U4 C'Bore Depth = .50" Y2 CUBE 1.5 Min. Good Thread .62 T3 S3 T4 S4 U3 U4 U5 V3 V4 V5 C'Bore Depth = .75" Y3 Y4 Y5 3 8 3 8 3 8 3 8 3 4 3 4 Min. Good Thread .62 T3 S3 T4 S4 U3 U4 U5 V3 V4 C'Bore Depth = .75" Y3 Y4 9 16 .425 3 8 .425 .75 BCD Min. Good Thread .62 T3 S3 T4 S4 U3 U4 U5 V3 V4 C'Bore Depth = .75" Y3 Y4 3 8 3 8 3 8 3 8 3 4 3 4 Min. Good Thread .62 T3 S3 T4 S4 U3 U4 U5 V3 V4 C'Bore Depth = .75" Y3 Y4 CUBE 2.0 Min. Good Thread .75 T3 S3 T4 S4 U4 U5 U6 V3 V4 V5 C'Bore Depth = 1.25" Y4 Y5 1 2 1 2 1 2 1 2 1 1 Min. Good Thread .75 T3 S3 T4 S4 U4 U5 U6 V3 V4 V5 C'Bore Depth = 1.25" Y4 Y5 3 4 .566 1 2 .566 1.0 BCD Min. Good Thread .75 T3 S3 T4 S4 U4 U5 U6 V3 V4 V5 C'Bore Depth = 1.25" Y4 Y5 1 2 1 2 1 2 1 2 1 1 Min. Good Thread .75 T3 S3 T4 S4 U4 U5 U6 V3 V4 V5 C'Bore Depth = 1.25" Y4 Y5 Legend for Hole Types Threaded Hole Thru Hole 72° Countersunk Hole Counterbore Hole for Cap Head Screw T1 = 6-32 S1 = 6-40 U0 = 0.128 Dia. for #4 Screw V0 = 0.128 Dia. for #4 Screw Y0 = for #4 Screw 0.128 Dia. Thru Hole 0.21 Dia. C'Bore T2 = 8-32 S2 = 8-36 U1 = 0.156 Dia. for #6 Screw V1 = 0.156 Dia. for #6 Screw Y1 = for #6 Screw 0.180 Dia. Thru Hole 0.29 Dia. C'Bore T3 = 10-24 S3 = 10-32 U2 = 0.180 Dia. for #8 Screw V2 = 0.180 Dia. for #8 Screw Y2 = for #8 Screw 0.180 Dia. Thru Hole 0.29 Dia. C'Bore T4 = 1/4-20 S4 = 1/4-28 U3 = 0.206 Dia. for #10 Screw V3 = 0.206 Dia. for #10 Screw Y3 = for #10 Screw 0.206 Dia. Thru Hole 0.34 Dia. C'Bore U4 = 0.266 Dia. for 1/4" Screw V4 = 0.266 Dia. for 1/4" Screw Y4 = for 1/4" Screw 0.266 Dia. Thru Hole 0.40 Dia. C'Bore U5 = 0.328 Dia. for 5/16" Screw V5 = 0.328 Dia. for 5/16" Screw Y5 = for 5/16" Screw 0.332 Dia. Thru Hole 0.50 Dia. C'Bore U6 = 0.391 Dia. for 3/8" Screw Tolerances are ± .010" except for Counterbore depth: ± .020" 403 starrett.com S t arrett -W ebber G age B locks