| Q. |
Is a bolt stronger because it is made of stainless steel? |
| A. |
No, stainless steel bolts are rated for corrosion resistance. Bolt strength is rated in PSI (pounds per square inch). A stainless steel bolt has the same PSI rating as a grade 5 bolts (125,000 PSI). A grade 8 bolt has a stronger rating with a PSI of 150,000. |
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| Q. |
Is a hex cap screw (bolt) partially threaded or fully threaded? |
| A. |
The ISO standard for hex cap screw thread length is 2 times the diameter plus 1/2 inch. Fully threaded bolts are called "tap bolts". |
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| Q. |
What is the difference between a hex head cap screw and a socket screw? |
| A. |
A socket screw is driven down with an "Allen Key". A hex head cap screw is driven down with a socket. |
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| Q. |
What are the advantages of flanged screws and flanged nuts? |
| A. |
These products are multifunctional connecting elements. The use of washers is therefore superfluous and, in the case of a profiled flange, the elements also prevent rotational loosening. |
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| Q. |
Can you dimension a screw joint for me? |
| A. |
In principle you are responsible for dimensioning but we will be happy to assist and advise you. In special cases, a recalculation for the joint will be made when all data have been supplied to us. |
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| Q. |
From which screw diameter must hexagon screws be stamped on the screw head with the appropriate quality and the manufacturer's designation? |
| A. |
M5. |
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| Q. |
What is the difference between a Torx and a Torx plus drive? |
| A. |
The angle of attack in the standard Torx is 15 degrees and that in the Torx plus is 0 degrees. Advantage: longer tool lives. Another advantage is better sliding of the bit into the inner drive. Owing to the elliptical shape, there is no radial force component. |
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| Q. |
Why are drill screws more difficult to mount in large metal sheets than in smaller metal sheets? |
| A. |
Large metal sheets are very flexible, i.e. the pressure cannot be transmitted 1:1. The screw tip can thus be annealed. |
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| Q. |
Can DIN7500 thread tapping screws be screwed into laser treated metal sheets? |
| A. |
Yes, if the sheet material is not hardened by the thermal action of the laser. Before the sheet material is chosen, it is advisable to carry out a test on sample sheets. |
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| Q. |
From which property class is the term 0.2% yield point (Rp0,2) used? |
| A. |
In the case of heat-treated screws from Class 8.8 and Inox screws. |
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| Q. |
What is particularly important during assembly with a chromium steel screw/nut joint? |
| A. |
The connecting element should be lubricated to prevent pitting during assembly. |
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| Q. |
How the cup is springs dimensioned? What are their characteristics? What is the effect of mounting the cup springs in alternate directions or in the same direction? |
| A. |
The cup springs can be combined in various ways when used in spring columns. When individual cups are stacked in the same direction, the spring force is proportionate to the number of individual cups in the case of identical spring travel. When individual cups are arranged in series in alternate directions, the spring travel is proportionate to the number of individual cups in the case of identical spring force. |
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| Q. |
Why do you recommend the use of round hexagon socket screws? |
| A. |
Round hexagon socket screws permit optimal force transmission. In comparison with other socket drives, this drive system is distinguished by little wear and low contact pressure. |
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| Q. |
What do you understand by the term 100 ppm? |
| A. |
100 deficient parts per million. |
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| Q. |
What does ISO stand for? |
| A. |
ISO stands for “International Organization for Standardization”. A link to their website can be found here: |
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| Q. |
What does DIN stand for? |
| A. |
DIN stands for “Deutsche Industry Norm is a German national standards organization”. A link to their website can be found here: |
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| Q. |
What does IEC stand for? |
| A. |
IEC stands for “International Electro Technical Commission Standard”. A link to their website can be found here: |
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| Q. |
What does NEMA stand for? |
| A. |
NEMA stands for “National Electrical Manufacturers Association”. A link to their website can be found here: . |
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| Q. |
What does UL stand for? |
| A. |
UL stands for “Underwriters Laboratories”. A link to their website can be found here: |
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| Q. |
What does JIS stand for? |
| A. |
JIS stands for "Japanese Industrial Standards (JIS)". A link to their website can be found here: |
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| Q. |
What does ASTM stand for? |
| A. |
ASTM stands for "International Standard Organization". A link to their website can be found here: |
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| Q. |
What does BS stand for? |
| A. |
BS stands for "British Standards". A link to their website can be found here: |
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| Q. |
What does EN stand for? |
| A. |
EN stands for "European Standards maintained by CEN European Committee for Standardization". A link to their website can be found here: . |
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| Q. |
What does AS stand for? |
| A. |
AS stands for "Standards Australia". A link to their website can be found here: |
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| Q. |
What does NZ stand for? |
| A. |
NZ stands for "Standards New Zealand". A link to their website can be found here: |
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| Q. |
What does TIS stand for? |
| A. |
TIS stands for "Thai Industrial Standards". A link to their website can be found here: |
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