Square Drive Self Drilling Screw Flat Head , Carbon Steel
Countersunk Tek Screws Metal
1. Applications:
Self Drilling Screws, Also Known as TEK Screws, Drill Point.Self Drillers are made of hard metal, usually specifically treated
to be harder than the metal that is being drilled into. The most
common material used in these Screws is 410 Stainless Steel. This
grade of stainless will provide the corrosion and rust resistance
of standard 18-8 stainless, however it has been heat treated (up to
40 Rockwell C) to ensure that the drill point will successfully
pierce the metal being drilled into.
As their name implies, self-drilling screws operate on the same
principles as drill bits and other cutting tools. For any cutting
tool, performance is governed by cutting speed, feed rate, depth of
cut and the work material itself. Then, installation performance of
selfdrilling screws can be linked to the basic cutting tool
parameters where suggested optimal parameter values are listed by
nominal screw size in the table.
Our factory produce this kind of self drilling screws with carbon
steel and stainless steel for more than 15 years. every month we
can ship 15-20 containers to the world market....
2.Descriptions:
1. Name: DIN7504P flat head self drilling tek screws, galvanize
2. Grade: C1018, C1022,
SUS201,SUS410,SUS304,SUS316,A2-70,A2-80,A4-80
3. Size: #4x3/8''~~#14x8''
4. Standard: DIN7504P, BS, JIS, ISO, per customer drawing or sample
5. Coating: zinc plated Cr+6, zinc plated Cr+3, ruspert 500 HRS,
1000 HRS
6. Thread Type: Type BSD, Type ASD, Type CSD, with wings, with
cutting thread, with Notch
7. Point: #1 point (#1PT)~~#5 point (#5PT)
8. Recess: philips drive, square drive, pozi drive, torx drive,
slot drive, 6-Lobe drive
9. Packing: bulk packing, small box packing, plastic box packing,
as customer requirements
3. Features:
# For light to heavy gauge metal -to-metal
# Self drilling Tip
# Philips flat head screw
# Zinc plated lowe carbon steel
# Available in sizes of #6, #8, #10, #12, #14
# Use zinc plated self drilling screws for light to heavy guage
metal to metal fastening applications, such as sheet metal to steel
stud. attach fixtures, backup plated, indoor frames and similar
items.
4. Drawing Specifications:
| Thread dia | ST2.9 | ST3.5 | ST3.9 | ST4.2 | ST4.8 | ST5.5 | ST6.3 |
| P | 1.10 | 1.30 | 1.40 | 1.40 | 1.60 | 1.80 | 1.80 |
| a | Max | 1.10 | 1.30 | 1.40 | 1.40 | 1.60 | 1.80 | 1.80 |
| Dk | Max | 5.50 | 6.80 | 7.50 | 8.10 | 9.50 | 10.80 | 12.40 |
| Min | 5.20 | 6.44 | 7.14 | 7.74 | 9.14 | 10.37 | 11.97 |
| k | 1.70 | 2.10 | 2.30 | 2.50 | 3.00 | 3.40 | 3.80 |
| r | Max | 1.10 | 1.40 | 1.50 | 1.60 | 1.90 | 2.10 | 2.40 |
| Punch | 1.00 | 2.00 | 2.00 | 2.00 | 2.00 | 3.00 | 3.00 |
| type H | M | 3.00 | 4.20 | 4.60 | 4.70 | 5.10 | 6.80 | 7.10 |
| Q | Min | 1.40 | 1.62 | 2.03 | 2.11 | 2.59 | 2.95 | 3.33 |
| Max | 1.70 | 2.12 | 2.53 | 2.62 | 3.10 | 3.53 | 3.91 |
| type Z | M | 2.80 | 4.00 | 4.20 | 4.40 | 5.00 | 6.30 | 7.00 |
| Q | Min | 1.48 | 1.60 | 1.85 | 2.05 | 2.64 | 2.72 | 3.38 |
| Max | 1.73 | 2.06 | 2.31 | 2.51 | 3.10 | 3.18 | 3.84 |
| Dp | 2.30 | 2.80 | 3.10 | 3.60 | 4.10 | 4.80 | 5.80 |
| Self Drilling Screws, Type CSD – SAE J78-1998 |
| Nominal Size or | Threads | D | P | Min. Practical Nominal Screw Lengths | Minimum Torsional |
| Basic Screw | Per Inch | Formed Points | Strength (lb.-in.) |
| Diameter | | Major | Protusion | Countersunk Heads | 90° Heads | (Steel Screws |
| | | Diameter | Allowance | Only) |
| | | Max | Min | #2 Point | #3 Point | #2 Point | #3 Point | #2 Point | #3 Point | |
| 10 | 0.19 | 24 | 0.19 | 0.1834 | 0.193 | 0.258 | 1/2 | 9/16 | 7/16 | 9/16 | 65 |
| 12 | 0.216 | 24 | 0.216 | 0.2094 | 0.223 | 0.293 | 5/8 | 5/8 | 1/2 | 21/32 | 100 |
| The CSD Self-Drilling Screws are also available as Self Drilling
and Reaming Screws. |
5. Advantages:
1.The Special technology treatment of the surface makes the product
anti-corrosion , antirust and durable.
2.Exact forging standard of knife edge and high hardness of surface
make it easy to drill.
3.Using the advanced technology to control the core hardness,
avoiding rupture effectivity,
4. Quick self drilling , drilling , tapping, locking the oncce, and
combining with the strength.
5. Save contruction time, improve working efficency.
6. Technology, professional manufacturing , quality assurance.
6. More pictures:
DIN7504P CSK HEAD SELF DRILLING TEK SCREWS
