TECH DATA

 

 

DRYWALL SCREWS SHEET METAL

 

 

DRYWALL SCREWS TWINFAST THREAD

SIZE DIAMETTER

SCREW DIAMETER

THREADS PER INCH

STEEL GAUGE

TENSION PULLOUT (lbs.)

SHEAR (lbs.)

average torsional strength (lbs.)

 

#6

 

6-9

25 0.019"

165

N / A

34

 

 

0.138

6-17

20 0.033"

358

N / A

 

 

#7

 

7-9

25 0.019"

160

N / A

39

 

 

0.151

7-16

20 0.033"

372

N / A

 

 

#8

 

8-8

25 0.019"

184

N / A

47

 

 

0.164

8-15

20 0.033"

402

N / A

 

 

#10

 

10-8

25 0.019"

194

N / A

75

 

 

0.19

10-12

20 0.033"

413

N / A

 

 

 

 

 

 

SHEET METAL SCREWS TWINFAST, TYPE A & AB

SIZE DIAMETTER

SCREW DIAMETER

THREADS PER INCH

STEEL GAUGE

TENSION PULLOUT (lbs.)

SHEAR (lbs.)

average torsional strength (lbs.)

 

#6

 

6-18

 

 

 

 

 

 

0.138

6-20

20 0.033"

404

562

34

 

#8

 

8-15

 

 

 

 

 

 

0.164

8-18

20 0.033"

437

821

47

 

#10

 

10-12

 

 

 

 

 

 

0.19

10-16

20 0.033"

460

878

75

 

#12

 

12-11

 

 

 

 

 

 

0.216

12-14

20 0.033"

549

1166

108

 

#14

 

14-10

 

 

 

 

 

 

0.25

14-14

20 0.033"

644

1038

161

 

 

 

 

 

Known as a multipurpose
screw used in a variety of applications.

Coarse Thread, for drywall to wood stud and attaching fixture to either material.

Fine Thread, for drywall to 20-25 gauge metal stud.

Yellow zinc plating used for aesthetics and in low corrosion resistant applications-
salt spray rating is 90 hours.

Recommended drive speed
of 2,500 rpm

 

The values listed are ultimate averages derived under independent laboratory conditions and apply to screws manufactured and distributed by IFG only. Minimum industry standard safety factor of 2.5 to 1 apply.

Screws are manufactured from cold heading quality steel complying with ASTM A548, grade 1022.

The installed screw must protrude through and beyond the metal member a minimum of three full threads. The distance from the center of a screw to the end or edge of a metal member shall not be less than three times the screw diameter. Steel members shall conform to section 2230, A3 of the code.25ga, 20ga, 18ga-ASTM A653 grade 33 S.Q. with a minimum of 33,000 psi yield strength. 16ga,14ga,12ga-ASTM A653 grade 50 S.Q. with a minimum of 50,000 psi yield strength.

 

 

SELF DRILLING

 

 

SELF DRILLING SCREWS

SIZE DIAMETTER

SCREW DIAMETER

THREADS PER INCH

STEEL GAUGE

TENSION PULLOUT (lbs.)

SHEAR (lbs.)

AVERAGE TORSIONAL STRENGTH (LBS)

 

#6

0.138

6-26

20 0.033"

299

480

 

 

 

 

 

18 0.044"

377

789

 

 

 

 

 

16 0.005"

629

877

34

 

 

 

 

14 0.069"

655

885

 

 

 

 

 

12 0.099"

724

 

 

 

#7

0.151

7-19

20 0.033"

269

544

39

 

 

 

 

18 0.044"

307

825

 

 

 

 

 

0.055"

598

987

 

 

#8

0.164

8-18

20 0.033"

304

513

 

 

 

 

 

18 0.044"

414

846

 

 

 

 

 

16 0.005"

172

1108

47

 

 

 

 

14 0.069"

744

1131

 

 

 

 

 

12 0.099"

872

 

 

 

#10

0.19

10-16

20 0.033"

324

580

 

 

 

 

 

18 0.044"

397

865

 

 

 

 

10-24

16 0.005"

671

291

75

 

 

 

 

14 0.069"

753

1576

 

 

 

 

 

12 0.099"

1142

1567

 

 

#12

0.216

12-14

20 0.033"

300

578

 

 

 

 

 

18 0.044"

342

914

 

 

 

 

12-24

16 0.005"

637

1308

108

 

 

 

 

14 0.069"

760

1836

 

 

 

 

 

12 0.099"

1212

2267

 

 

#14

0.25

14-14

20 0.033"

325

609

 

 

 

 

 

18 0.044"

354

965

 

 

 

 

14-20

16 0.005"

593

1372

161

 

 

 

 

14 0.069"

772

1941

 

 

 

 

 

12 0.099"

1175

2468

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Screws meet or exceed the following testing standard.

ASTM C954-93           SAE J78 1979            ICC AC118              AISI-CF 92-1         

 

 

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