Particle Board Decorative Self Threading Metal Screws For Thick
Steel Right Hand Threads
1. Descriptions:
Sheet metal screws have a pointed end and widely spaced threads.
They're self-starting in thin sheet metal, but in thicker materials
a drilled hole is recommended.
Stainless steels are used for their corrosion resistance,
high-temperature strength, scaling resistance, and low-temperature
toughness. These properties account for their extremely wide use in
practically every industry. Austenitic Stainless Steels are alloys
of iron and carbon that contain between 16% and 30% Chromium, a
maximum of 0.15% carbon, along with Nickel (or Manganese), and
other alloying elements. The chromium, which helps develop a
passive surface oxide film, provides corrosion resistance in
stainless steels. Austenitic Stainless Steels are designated by a 3
digit SAE Stainless Steel Grade beginning with the number 3 (e.g.
304, 316). Another common naming convention for Austenitic
Stainless Steels are 18/8, 18/10, 18/0, etc. where the 18 refers to
the % of Chromium and 8 to the % of Nickel contained in the
material.
Flat head fasteners are designed to fit flush to the surface when
used with countersunk holes. Length is measured from the top of the
head. The Phillips drive style was originally designed so that the
driver would slip out under extreme torque, preventing
over-tightening and damage to the fastener or the material.
Self-Drilling Points are excellent for use with sheet metal.
2. Specifications:
1. Name: DIN7504P flat head self drilling screws, countersunk head
tek screws
2. Grade: C1018, C1022,
SUS201,SUS410,SUS304,SUS316,A2-70,A2-80,A4-80
3. Size: 2.9x10mm--6.3x200mm
4. Standard: DIN7504P
5. Certification: ISO9001, SGS, CTI, ROHS
Product Name | DIN7504P flat head self drilling screws |
Material | stainless steel, carbon steel, alloy steel, brass and so on |
Color | zinc plated Cr+6, zinc plated Cr+3, polished, HDG, ruspert, nickel |
Standard | DIN GB ISO JIS BA ANSI |
Grade | C1018, C1022, SUS201, SUS304, SUS316, A2-70, A2-80, A4-80 |
Sizes | #4x10mm---#14x200mm, 2.9x10mm--6.3x200mm |
Thread Type | Type BSD, Type ASD, Type CSD, with wings, with cutting thread |
Drive | philips, pozi, socket, hex, square, slotted, combined |
3. Applications:
Self-drilling screws have hardened drill points that will drill and
thread in structural steel, mild steel, aluminum and wood. These
drill points are manufactured in the same method as the high speed
drill bits. Self-drilling screws are available in a variety of
finishes with unique product features to suit a wide range of
environmental conditions.
- For the fastening process in steel, they are used on steel frame
construction or fastening other materials on steel.
- For the fastening process in wood, they are used for applications
in wood structures or industrial lightweight constructions, such as
roof deck, flooring.
- For the fastening process in aluminum, they are used for special
industrial applications, construction and manufacturing of windows.
- Widely applied for fastening in window or door frames purpose
- Using in flat surfaces required and using in pre drilled holes.
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 BSD – SAE J78-1998 |
| Nominal Size or | Threads | T | t | P | Min. Practical Nominal | Minimum |
| Basic Screw | Per Inch | Screw Lengths | Torsional |
| Diameter | | Formed Points | Strength |
| | | Major Diameter | Minor Diameter | Protusion Allowance | | (lb.-in.) |
| | | Min | Max | Min | Max | #2 Pt. | #3 Pt. | 90° Head | Csk Head | 90° Head | Csk Head | Steel Screws |
| | | #2 Pt | #2 Pt | #3 Pt | #3 Pt | |
| 4 | 0.112 | 24 | 0.114 | 0.11 | 0.086 | 0.082 | 0.163 | – | 5/16 | 3/8 | – | – | 14 |
| 6 | 0.138 | 20 | 0.139 | 0.135 | 0.104 | 0.099 | 0.19 | 0.22 | 5/16 | 3/8 | 3/8 | 7/16 | 24 |
| 7* | 0.151 | 19 | 0.153 | 0.146 | 0.113 | 0.109 | 0.137 | 0.157 | 5/16 | 3/8 | 3/8 | 7/16 | – |
| 8 | 0.164 | 18 | 0.166 | 0.161 | 0.122 | 0.116 | 0.211 | 0.251 | 3/8 | 7/16 | 7/16 | 1/2 | 42 |
| 10 | 0.19 | 16 | 0.189 | 0.183 | 0.141 | 0.135 | 0.235 | 0.3 | 7/16 | 1/2 | 1/2 | 9/16 | 61 |
| 12 | 0.216 | 14 | 0.215 | 0.209 | 0.164 | 0.157 | 0.283 | 0.353 | 1/2 | 5/8 | 1/2 | 5/8 | 92 |
| 1/4 | 0.25 | 14 | 0.246 | 0.24 | 0.192 | 0.185 | 0.318 | 0.393 | 1/2 | 5/8 | 1/2 | 5/8 | 150 |
| * Specs for #7 diameter drill screws are not included in SAE J78 at
this time. |
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
