Perry Catalogue Edition 27 (2024)

FIXINGS & FASTENERS Fixings & Fasteners Guide

Gauge / Diameter

Recess Style

The gauge of the screw is determined by the size of the outside thread diameter.

POZI

Metric Diameter (mm) approx.

Hole Size for Rawl Plug (mm)

Gauge

Pilot Hole Size (mm)

Masonry Rawl Plug

Standard recess for woodscrews, chipboard screws etc.

3

2.5

1

Yellow

5

4

3

1.5

Yellow

5

6

3.5

2

Red

6

8

4

2.5

Red (or Brown)

6 (or 7)

10

5

3

Brown

7

TORX

12

5.5

3.5

Brown

7

14

6.5

4

Blue

10

High performance recess.

Metric (mm)

Imperial (Inch)

Thread Length

Head Types

3.17 (3.0) 7.94 (8.0) 9.52 (10.0) 12.70 (12.0) 19.05 (19.0) 25.40 (25.0) 31.75 (32.0) 38.10 (38.0) 45.45 (45.0) 50.80 (50.0) 57.15 (57.0) 63.50 (63.0) 69.85 (70.0) 76.20 (75.0)

1/8”

5/16”

3/8” 1/2” 3/4”

1”

1 1/4” 1 1/2” 1 3/4” 2 1/4” 2 1/2” 2 3/4” 2”

COUNTERSUNK

For a flush finish.

3” 4” 5” 6” 7” 8” 9”

101.60 (100.0) 127.00 (125.0) 152.40 (150.0) 177.80 (175.0) 203.20 (200.0) 228.60 (230.0) 254.00 (250.0)

HEX

Positive hex drive.

10”

Plating & Finishes

Aluminium

Black Organic Green

Bright Self Colour

Stainless Steel Galvanised

Sheradised

Yellow Passivated

Zinc Plated

Corrosion Resistance Rating

R

R

R

R

R

N

N

N

E

E

E

N

N

E

E

S

S

S

S

O

O

S

O

O

O

I

I

I

I

I

I

I

I

I

I

S

S

S

S

S

S

S

S

S

S

T

T

T

T

T

O

O

O

O

O

A

A

A

A

A

R

R

R

R

R

N

N

N

N

N

5 1

5 1

5 1

5 1

R

R

5 1

R

R

R

C

C

C

C

C

O

O

O

O

O

E

E

E

E

E

C

C

C

C

C

2

2

2

4

4

4

4

4

2

2

3

3

3

3

3

U

M

U

S

D

N

E

U

E

L

O

E

R

T

T

T

P

T

T

D

O

R

I

I

H

E

A

A

A

E

R

M

E

R

I

H

G

197

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+44 (0)1384 414001

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