Aluminum

Brass

Bronze

Copper

Fiberglass

Iron

Nickel

Plastic

Stainless Steel

Steel

Titanium

Hardened Steel

1"

1 1/16"

1 1/8"

1 11/64"

1 3/16"

1 1/4"

1 23/64"

1 3/8"

1 7/16"

1 35/64"

1 37/64"

1 19/32"

1 21/32"

Inch

9

18

Drill Bit

Tap

Blind

Through

UNC

UNF

H2

H3

1"

1 1/8"

1 1/4"

1 3/8"

1 7/16"

1 21/32"

Metal Case

18

36

2"

2 1/16"

2 1/8"

2 5/32"

2 11/64"

2 7/32"

2 3/8"

2 15/32"

2 1/2"

2 5/8"

2 23/32"

2 7/8"

2 15/16"

3 1/8"

3 5/32"

3 7/32"

3 3/8"

9

18

1 each of sizes 6-32, 6-40, 8-32, 8-36, 10-24, 10-32, 12-24, 12-28, 1/4"-20, 1/4"-28

1 each of sizes 6-40, 8-36, 10-24, 10-32, 1/4-28, 5/16-24, 3/8-24, 7/16-20, and 1/2-20

5/16"-18, 5/16"-24, 3/8"-16, 3/8"-24, 7/16"-14, 7/16"-20, 1/2"-13, and 1/2"-20

6-40, 8-36, 10-24, 10-32, 1/4"-28, 5/16"-24, 3/8"-24, 7/16"-20, and 1/2"-20

0.141"

0.168"

0.194"

0.22"

0.255"

0.318"

0.323"

0.381"

0.1065"

0.113"

0.136"

0.1495"

0.159"

0.177"

0.18"

0.201"

0.213"

0.257"

0.272"

0.3125"

0.332"

0.368"

0.3906"

0.4219"

0.4531"

EAR99

Exempt

Compliant

Not Compliant

Compliant