British Standard
Solid & Split Taper Pins


Diameter D at
Large end in.		 Length L in Inches
1/4 3/8 1/2 5/8 3/4 7/8 1 1-1/4 1-1/2 1-3/4 2 2-1/4 2-1/2 2-3/4
Nom. Max. Min. O =Solid taper pins                      Ø = Split taper pins
1/32*
3/64*
1/16
5/64
3/32
7/64*
1/8
9/64*
5/32
11/64*
3/16
7/32
1/4
9/32
5/16
11/32*
3/8
13/32*		 0.0312
0.0469
0.0625
0.0781
0.0938
0.1094
0.1250
0.1406
0.1562
0.7779
0 1875
0.2188
0.2500
0.2812
0.3125
0.3438
0.3750
0.4062		 0.0292
0.0449
0.0605
0.0761
0.0918
0.1074
0.1230
0.1386
0.7542
0.1699
0.1855
0.2168
0.2460
0.2772
0.3085
0.3398
0.3710
0.4022		 O O
O
O
O
O		 O
O
O
O
O
O
O		 O
O
OØ
OØ
OØ
O
O
O
O
O
OØ
OØ
OØ
OØ
OØ
O
O
O
O		 OØ
OØ
OØ
OØ
OØ
OØ
O
O
O		 OØ
OØ
OØ
OØ
OØ
OØ Ø
OØ
OØ
OØ
O
O		 O
OØ
OØ
OØ
OØ
OØ
OØ
OØ
OØ
OØ
O
O		 O
OØ
OØ
OØ
OØ
OØ
OØ
OØ
OØ
OØ
O
O
 
 

O
OØ
OØ
OØ
OØ
OØ
OØ
OØ
OØ
O
O
 
 

O
O
OØ
OØ
OØ
OØ
OØ
OØ
OØ
O
OØ
O
O
 
 
 

O
O
OØ
OØ
OØ
OØ
OØ
OØ
O
OØ
O
O
 
 
 
 
 

O
O
OØ
OØ
OØ
OØ
O
OØ
O
O
O
 
 
 
 
 
 
 

OØ
OØ
Ø
OØ
O
OØ
O
OØ
Nom. Max. Min. 3 3-1/4 3-1/2 3-3/4 4 4-1/2 5 5-1/2 6 6-1/2 7 7-1/2 8 x
O =Solid taper pins                        Ø = Split taper pins
11/64*
3/16
7/32
1/4
9/32
5/16
11/32*
3/8
13/32*
7/16
1/2
9/16*
5/8
3/4
7/8		 0.1719
0.1875
0.2188
0.2500
0.2812
0.3125
0.3438
0.3750
0.4062
0.4375
0.5000
0.5625
0.6250
0.7500
0.8750		 0.1699
0.1355
0.2168
0.2460
0.2772
0.3085
0.3398
0.3710
0.4022
0.4335
0.4960
0.5585
0.6210
0.7460
0.8710		 O
OØ
OØ
OØ
O
OØ
O
OØ
O
OØ
O		 OØ
OØ

OØ
O
OØ

OØ
O
 
 

OØ
O
OØ
O
OØ
O
OØ
OØ
O
 
 
 

Ø

OØ

OØ
OØ
O
 
 

O
OØ
O
OØ
O
OØ
OØ
OØ
O
 
 
 

OØ
O
OØ
O
OØ
OØ
OØ
O
 
 
 
 

O
OØ
O
OØ
OØ
OØ
OØ
O
 
 
 
 
 

Ø

Ø
OØ
OØ
OØ
O
 
 
 
 
 
 
 

OØ
OØ
OØ
OØ
OØ
O
 
 
 
 
 
 
 

Ø
Ø
Ø
Ø

 
 
 
 
 
 
 
 

Ø
Ø
Ø
Ø
OØ
O
 
 
 
 
 
 
 
 
 

Ø
Ø
 
 
 
 
 
 
 
 
 

Ø
Ø
Ø
O
 
 
 
 
 
 
 
 
 
 
 
 

Ø
'Asterisk indicates non-preferred sizes. Taper on diameter is 1 in 48 (1/4 inch per foot). Tolerances on lengths are as follows: up to and including 2 inches, ± 0.015 inch; above 2 inches and up to and including 6 inches, ± 0.040 inch; and above 6 inches. = ± 0.100 inch. Tolerance on the taper is ± 0.0005 inch per inch. These pins come in four Classes: A (mild steel), B (high grade mild steel), C (high tensile steel), and D (stainless steel) with minimum Brinell hardnesses of 121 for the solid pins and 111 for tile split pills of Classes A and B and 248 for both the solid and split pins of Classes C and D.
Index