Torx Drive Self High Low Thread Self Drilling Screws Wood To Metal
, Round Head Machine Screw
1. Description:
These screws are made of 410 stainless steel, high hardness (40
Rockwell C), resists corrosion in mild environments, applied to
steel-work.
Standard cross recessed pan head screw, smooth and complete,
stressed uniformly, hard to to skid in the process of spinning.
Precise screw design, the thread can decrease the resistance when
screwing in, prevent cracking. There is no need to drill a hole
first, sharp tail is easy to drill.
We are factory who is specialized in manufacturing many kinds of
screws for more than 15 years, we can produce it according to many
standard, such as DIN, JIS, GB and so on...every month we can ship
15-20 containers to the world market....if you have such
requirements, pls contact us freely....
2. Product Specification:
1. Name: DIN7504N SS304 torx pan head self drilling screws
2. Grade: C1018, C1022,
SUS201,SUS410,SUS304,SUS316,A2-70,A2-80,A4-80
3. Size: 2.2mmx6.5mm--6.3x200mm
4. Standard: DIN7504N or as drawings
5. Packing: small box packing, plastic box packing, bucket packing
6. Certification: ISO9001, SGS, CTI, ROHS
7. Thread: fine thread, coarse thread, Hi-Low thread
8. Drive: philips, pozi, socket, hex, square, slotted, combined
3. Chemical composition
| stainless steel chemical composition |
| Material | C max | Si max | Mn max | P max | S max | Ni max | Cr max | Mo max |
| SUS201 | 0.15 | 1 | 5.5-7.5 | 0.06 | 0.03 | 3.5-5.5 | 16-18 | |
| SUS304 | 0.08 | 1 | 2 | 0.045 | 0.03 | 8.0-10.0 | 18-20 | |
| SUS304L | 0.03 | 1 | 2 | 0.045 | 0.03 | 8.0-12.0 | 18-20 | |
| SUS305 | 0.12 | 1 | 2 | 0.045 | 0.03 | 10.5-13.0 | 17-19 | |
| SUS316 | 0.08 | 1 | 2 | 0.045 | 0.03 | 10.0-14.0 | 16-18 | 2.0-- 3.0 |
| SUS316L | 0.03 | 1 | 2 | 0.045 | 0.03 | 10.0-15.0 | 16-18 | 2.0-- 3.0 |
| SUS410 | 0.15 | | 1 | | 0.03 | - | 11.5-13.5 | |
| SUS420 | 0.26-0.4 | | 1 | | 0.03 | - | 12-- 14 | |
4. Self-Drilling Screw Selection Guide
Drill Flute
The length of the drill flute determines the metal thickness that
can be drilled. The flute itself provides a channel for chip removal during drilling action. If it becomes completely
imbedded in material, drill chips will be trapped in the flute and
cutting action will cease. This will cause the point to burn up or
break
Point Length
The unthreaded section from the point to the first thread should be
long enough to assure the drilling action is complete before the first thread engages the drilled metal. Screw
threads advance at a rate of up to ten times faster than the drill flute can remove metal. All drilling therefore
should be complete before threads begin to form.
Drilling Through Wood To Metal
If your application calls for drilling through wood over 1/2" in
thickness, a clearance hole is required. Select a fastener with
break away wings for this type of job. The wings will ream a
clearance hole and break-off when in contact with metal surface
(minimum metal thickness .090") to be drilled.
5. Technical Data of drilling screws:
| 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 |
| Self tapping screw ASA TYPE A |
| sizes | thread No/P(T) | outer dia. | rolling dia. |
| | | Max | Min | Max | Min |
| No.0 | 40 | 1.52 | 1.44 | 1.20 | 1.15 |
| No.1 | 32 | 1.90 | 1.82 | 1.50 | 1.45 |
| No.2 | 32 | 2.23 | 2.13 | 1.80 | 1.75 |
| No.3 | 28 | 2.56 | 2.46 | 2.10 | 2.05 |
| No.4 | 24 | 2.89 | 2.79 | 2.30 | 2.25 |
| No.5 | 20 | 3.30 | 3.20 | 2.65 | 2.60 |
| No.6 | 18 | 3.58 | 3.45 | 2.80 | 2.75 |
| No.7 | 16 | 4.01 | 3.86 | 3.15 | 3.10 |
| No.8 | 15 | 4.26 | 4.11 | 3.35 | 3.30 |
| No.9 | 14 | 4.55 | 4.40 | 3.50 | 3.45 |
| No.10 | 12 | 4.92 | 4.77 | 3.75 | 3.70 |
| No.12 | 11 | 5.60 | 5.46 | 4.40 | 4.35 |
| No.14 | 10 | 6.45 | 6.29 | 5.10 | 5.05 |
| No.16 | 10 | 7.11 | 6.96 | 5.70 | 5.65 |
| No.18 | 9 | 7.77 | 7.62 | 6.10 | 6.05 |
6. Advantage:
1. Quality control: we make 100% quality test during producing and
before shipping
2. Rich experience: we have been export screws for more than 20
years
3. Competitive prices: the better quality, but cheaper prices
4. Timely quotation: send you prices within one day
5. Good services: we supply OEM, ODM,OBM services and best
after-sale services
6. Punctual delivery: we can ship every order without delay
7. Easy contact: skype and wechat: majestytom, QQ: 30062277
6. More Pictures for referance:
DIN7504N PAN HEAD TORX SELF DRILLING SCREW
