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Thread Cutting Screws

Thread Cutting Screws  - Strengths and Tightening Torques

TYPES 1 and 23 Thread Cutting Screws
TIGHTENING TORQUES

The tightening torques for metal applications are dependant on many factors such as hole size, material thickness,finish, etc. For many applications a tightening torque midway between highest driving torque and lowest faliure torque should be selected. This should not usually exceed the MAXIMUM recommended tightening torques as shown.

TYPE 25 Thread Cutting Screws
TIGHTENING TORQUES

The tightening torques for plastic applications are usually dependent upon the ultimate shear strength of the material involved. For most applications a tightening torque midway between the highest driving torque and lowest failure torque should be selected. This should not usually exceed the MAXIMUM recommended
tightening torque shown. Thread-RIte is always at your service with any questions, contact us.


Types 1 and 23 Thread Cutting Screw
Screw
Size

Ultimate Strength

MAXIMUM

Minimum
Tension
( Pounds)

Torque ( Inch - Pounds) Recommended
Tightening
Torques
(Inch- Pounds)

Minimum
Blind Hole

Minimum
Open Hole
2-56 475 6.0 7.0 6.0

3-48
650 9.0 10.0 9.0
4-40 800 13.5 14.0 13.5
4-48 875 13.5 14.0 13.5
5-40 1050 19.0 21.0 19.0
6-32 1 200 26.5 28.0 26.0
6-40 1350 28.0 30.0 28.0
8-32 1950 45.0 55.0 45.0
8-36 1975 50.0 60.0 50.0
10-24 2350 65.0 75.0 65.0
10-32 2700 75.0 90.0 75.0
12-24 3250 100.0 1 25.0 100.0
1 2-28 3450 125.0 135.0 1 25.0
1/4 -20 4225 1 55.0 175.0 155.0
1/4-28 4900 200.0 220.0 200.0

Types 25 Thread Cutting Screw
Screw
Size

Ultimate Strength

MAXIMUM

Minimum
Tension
( Pounds)

Torque ( Inch - Pounds) Recommended
Tightening
Torques
(Inch - Pounds)
Minimum
Blind Hole
(Inch- Pounds)
2-32 425 5.0 4.5
3-28 575 9.0 8.5
4-24 725 13.0 12.0
5-20 975 19.0 18.0
6-20 1125 25.0 25.0
8-18 1775 42.0 40.0
60.0 2100 61.0 60.0
12-14 2900 92.0 90.0
1/4-14 3800 150.0 145.0




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Thread-Rite Screw Products Chicago, Illinois
9630 W. Foster Avenue Chicago, Illinois 60656
Phone: 773.992.2290 Fax: 773.992.2297
trsales@thread-rite.com


Thread-Rite Screw Products, Incorporated
Implements a Quality Management System in accordance with:

ISO 9002 Certified Certificate Number: 862


Certificate Number: 862
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