Conversion Tables

DRILL SIZES(Inches)

NUMBER	SIZE
1	0.2280
2	0.2210
3	0.2130
4	0.2090
5	0.2055
6	0.2040
7	0.2010
8	0.1990
9	0.1960
10	0.1935
11	0.1910
12	0.1890
13	0.1850
14	0.1820
15	0.1800
16	0.1770
17	0.1730
18	0.1695
19	0.1660
20	0.1610
21	0.1590
22	0.1570
23	0.1540
24	0.1520
25	0.1495
26	0.1470

NUMBER	SIZE
27	0.1440
28	0.1405
29	0.1360
30	0.1285
31	0.1200
32	0.1160
33	0.1130
34	0.1110
35	0.1100
36	0.1065
37	0.1040
38	0.1015
39	0.0995
40	0.0980
41	0.0960
42	0.0935
43	0.0890
44	0.0860
45	0.0820
46	0.0810
47	0.0785
48	0.0760
49	0.0730
50	0.0700
51	0.0670
52	0.0635

LETTER	SIZE
A	0.234
B	0.238
C	0.242
D	0.246
E	0.250
F	0.257
G	0.261
H	0.266
I	0.272
J	0.277
K	0.281
L	0.290
M	0.295
N	0.302
O	0.316
P	0.323
Q	0.332
R	0.339
S	0.348
T	0.358
U	0.368
V	0.377
W	0.386
X	0.397
Y	0.404
Z	0.413

PINTS (IMPERIAL) TO LITRES

	0	1	2	3	4	5	6	7	8
		0.568	1.136	1.705	2.273	2.841	3.841	3.978	4.546
1/4	0.142	0.710	1.279	1.846	2.415	2.983	3.552	4.120	4.688
1/2	0.284	0.852	1.420	1.989	2.557	3.125	3.125	4.262	4.830
3/4	0.426	0.994	1.563	2.131	2.699	3.267	3.836	4.404	4.972

MILES TO KILOMETRES

	0	1	2	3	4	5	6	7	8	9
0		1.609	3.219	4.828	6.437	8.047	9.656	11.265	12.875	14.484
10	16.093	17.702	19.312	20.921	22.530	24.140	25.749	27.358	28.968	30.577	10
20	32.187	33.796	35.406	37.015	38.624	40.234	41.843	43.452	45.062	46.671	20
30	48.280	49.890	51.499	53.108	54.717	56.327	57.936	59.545	61.155	62.764	30
40	64.374	65.983	67.593	69.202	70.811	72.421	74.030	75.639	77.249	62.764	40
50	80.467	82.077	83.686	85.295	86.904	88.514	90.123	91.732	93.342	94.951	50
60	96.561	98.170	99.780	101.389	102.998	104.608	106.217	107.826	109.436	111.045	60
70	112.654	114.264	115.873	117.482	119.091	120.701	122.310	123.919	125.529	127.138	70
80	128.748	130.357	131.967	133.576	135.185	136.795	138.404	140.013	141.623	143.232	80
90	144.841	146.451	148.060	149.669	151.278	152.888	154.497	156.106	157.716	159.325	90

MILLIMETRES TO INCHES

1/1000
mm.	inches.
0.001	0.000039
0.002	0.000079
0.003	0.000118
0.004	0.000157
0.005	0.000197
0.006	0.000236
0.007	0.000276
0.008	0.000315
0.009	0.000354

1/100
mm.	inches.
0.01	0.00039
0.02	0.00079
0.03	0.00118
0.04	0.00157
0.05	0.00197
0.06	0.00236
0.07	0.00276
0.08	0.00315
0.09	0.00354

1/10
mm.	inches.
0.001	0.00394
0.002	0.00787
0.003	0.01181
0.004	0.01575
0.005	0.01969
0.006	0.02362
0.007	0.02756
0.008	0.03150
0.009	0.03543

FRACTIONS TO DECIMALS - DECIMALS OF INCH TO MILLIMETRE

Fractions			Decimals	mm.		Fractions			Decimals	mm.
		1/64	.015625	.3969				33/64	.515625	13.0969
	1/32		.03125	.7937			17/32		.53125	13.4937
		3/64	.046875	1.1906				35/64	.546675	13.8906
1/16			.0625	1.5875		9/16			.5625	14.2875
			.078125	1.9844				37/64	.578125	14.6844
	3/32		.09375	2.3812			19/32		.59375	15.0812
		7/64	.109375	2.7781				39/64	.609375	15.4781
1/8			.125	3.1750		5/8			.625	15.875
		9/64	.140625	.35719				41/64	.640625	16.2719
	5/32		.15625	3.9687			21/32		.65685	16.6687
		11/64	.171875	4.3656				43/64	.671875	17.0656
3/16			.1875	4.7625		11/16			.6375	17.4625
		13/64	.203125	5.1594				45/64	.703125	17.8594
	7/32		.21875	5.562			21/32		.71875	18.2562
		15/64	.234375	5.9531				47/64	.734375	18.6531
1/4			.25	6.3500		3/4			.75	19.05
		17/64	.265625	6.7469				49/64	.765625	19.4469
	9/32		.28125	7.1437			25/32		.78125	19.8437
		19/64	.296875	7.5406				51/64	.796875	20.2406
5/16			.3125	7.9375		13/16			.8125	20.6375
	11/322		.34375	8.7312			27/32		.84375	21.4312
		23/64	.359375	9.1281				55/64	.859375	21.8281
3/8			.375	9.5250		7/8			.875	22.225
		25/64	.390625	9.9219				57/64	.890625	22.6219
	13/32		.40625	10.3187			29/32		.90625	23.0187
		27/64	.421875	10.7156				59/64	.921875	23.4156
7/16			.4375	11.1125		15/16			.9375	23.8125
		29/64	.453125	11.5094				61/64	.953125	24.2094
	15/32		.46875	11.9062			31/32		.96875	24.6062
		31/64	.484375	12.3031				63/64	.984375	25.0031
1/2			.5	12.700		1"				25.4

BOLT THREADS & WIRE GAUGE SIZES

U.N.E.F.			U.N.F				U.N.C
Dia.	No of Thds		Dia.	No of Thds			Dia.	No of Thds
1/4 in.	32		1/4 in.	28			1/4 in.	20
5/16 in.	32		5/16 in.	24			5/16 in.	18
3/8 in.	32		3/8 in.	24			3/8 in.	16
7/16 in.	28		7/16 in.	20			7/16 in.	14
1/2 in.	28		1/2 in.	20			1/2 in.	13
9/16 in.	24		9/16 in.	18			9/16 in.	12
5/8 in.	24		5/8 in.	18			5/8 in.	11
11/16 in.	24		3/4 in.	16			3/4 in.	10
3/4 in.	20		7/8 in.	14			7/8 in.	9
13/16 in.	20		1 in.	12			1 in.	8
7/8 in.	20		1-1/8 in.	12			1-1/8 in.	7
15/16 in.	20		1-1/4 in.	12			1-1/4 in.	7
1 in.	20		1-3/8 in.	12			1-3/8 in.	6
1-1/16 in.	18		1-1/2 in.	12			1-1/2 in.	6
1-1/8 in.	18						1-3/4 in.	5
1-3/16 in.	18						2 in.	4-1/2 in.		B.S.F.
1-1/4 in.	18									Dia. Of Bolt	T.P.I
1-5/16 in.	18		B.A							(inch)
1-3/8 in.	18		No.	Dia. Of Bolt	T.P.I					7/32 in.	28
1-7/16 in.	18		(inch)							1/4 in.	26
1-1/2 in.	18		0	0.2362	25.4		B.S.W			9/32 in.	26
1-9/16 in	18		1	0.2087	28.2		Dia. Of Bolt	T.P.I		5/16 in.	22
1-5/8 in.	18		2	0.1850	31.4		(inch)			3/8 in.	20
1-11/16 in.	18		3	0.1614	34.8		1/4 in.	20		7/16 in.	18
			4	0.1417	38.5		5/16 in.	18		1/2 in.	16
			5	0.1260	43.0		3/8 in.	16		9/16 in.	16
			6	0.1102	47.9		7/16 in.	14		5/8 in.	14
			7	0.0984	52.9		1/2 in.	12		11/16 in.	14
			8	0.0866	59.1		9/16 in.	12		3/4 in.	12
			9	0.0748	65.1		5/8 in.	11		13/16 in.	12
			10	0.0669	72.6		11/16 in.	11		7/8 in.	11
			11	0.0591	81.9		3/4 in.	10		1 in.	10
			12	0.0511	90.9		13/16 in.	10		1-1/8 in.	9
			13	0.0472	102.0		7/8 in.	9		1-1/4 in.	9
			14	0.0394	109.9		15/16 in.	9		1-3/8 in.	8
			15	0.0354	120.5		1 in.	8		1-1/2 in.	8
			16	0.0311	133.3					1-5/8 in.	8

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