ASME B.94.11M, HSS Three Flats Twist Drill Bits

 

 

 

 

 

 

 

 

Fractional
Dia. Dec Eq. Flute Length OAL
1/16
5/64
3/32
7/64
1/8
 
.0625
.0781
.0938
.1094
.1250
 
7/8
1
1-1/4
1-5/16
1-7/16
 
1-7/8
2
2-1/4
2-3/8
2-1/2
 
9/64
5/32
11/64
3/16
13/64
 
.1406
.1563
.1719
.1875
.2031
 
1-9/16
1-11/16
1-13/16
1-7/8
1-15/16
 
2-5/8
2-3/4
2-7/8
3
3-1/8
 
7/32
15/64
1/4
17/64
9/32
 
.2188
.2344
.2500
.2656
.2813
 
2
1-1/6
2
2-1/8
2-1/4
 
3-1/4
3-3/8
3-1/2
3-5/8
3-3/4
 
19/64
5/16
21/64
11/32
23/64
.2969
.3125
.3281
.3438
.3594
2-3/8
2-1/2
2-9/16
2-5/8
2-11/16
3-7/8
4
4-1/16
4-1/8
4-3/16
3/8
25/64
13/32
27/64
7/16
 
.3750
.3906
.4063
.4219
.4375
 
2-11/16
2-3/4
2-13/16
2-7/8
2-15/16
 
4-1/4
4-5/16
4-3/8
4-7/16
4-1/2
 
29/64
15/32
31/64
1/2
 
.4531
.4688
.4844
.5000
 
3
3-1/8
3-1/4
3-3/8
 
4-5/8
4-3/4
4-7/8
5