UNIFIED

Thread Size

Type

Thread Code

Length "L" ±.015
( Length Code is in 16ths of an inch)

Min.Sheet Thickness

Hole Size In Sheet +0.003
-0.000

Max.Hole in Attach Parts

H
±.015

S Max. (2)

T
Max.

Min.Dist Hole C/L To Edge

Fastener Material

Steel

Stainless Steel

.250

.312

.375

.500

.625

.750

.875

1.00

1.25

1.50

.086-56(#2-56)

TFH

HFHS

256

4

5

6

8

10

12

NA

NA

NA

NA

.020

.085

.105

.141

.070

.025

.187

.112-40(#4-40)

TFH

HFHS

440

4

5

6

8

10

12

14

NA

NA

NA

.020

.111

.135

.176

.070

.025

.219

.138-32(#6-32)

TFH

HFHS

632

4

5

6

8

10

12

14

16

20

24

.020

.137

.160

.203

.070

.025

.250

.164-32(#8-32)

TFH

HFHS

832

4

5

6

8

10

12

14

16

20

24

.020

.163

.185

.234

.070

.025

.281

.190-24(#10-24)

TFH

HFHS

024

NA

5

6

8

10

12

14

16

20

24

.020

.189

.210

.250

.090

.025

.281

.190-32(#10-32)

TFH

HFHS

032

NA

5

6

8

10

12

14

16

20

24

.020

.189

.210

.250

.090

.025

.281

METRIC

Thread Size X Pitch

Type

Thread Code

Length Code"L" ± 0.4
( Length Code is in millimeters)

Min.Sheet Thickness

Hole Size In Sheet +0.08

Max.Hole in Attach Parts

H
±0.4

S Max. (2)

T
Max.

Min.Dist Hole C/L To Edge

Fastener Material

Steel

Stainless Steel

M3X0.5

TFH

TFHS

M3

6

8

10

12

15

18

20

25

NA

NA

0.51

3

3.6

4.5

1.8

0.64

5.6

M4X0.7

TFH

TFHS

M4

NA

8

10

12

15

18

20

25

30

35

0.51

4

4.6

5.8

1.8

0.64

7.2

M5X0.8

TFH

TFHS

M5

NA

8

10

12

15

18

20

25

30

35

0.51

5

5.6

6.4

2.3

0.64

7.2