Active Member
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[China]
Address: Rongda Industrial Park, Xinhua Road, Wangting Town, Suzhou City, China
Contact name:
Suzhou Crever Fastener Co., Ltd |
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9.5mm - 200mm Screwfix Self Drilling Screws Nibs Under Head , Ss Tek Screws Cr + 3
1. Descriptions:
1. Name: DIN7504P flat head self drilling tek screws, Zinc plated
2. Grade: C1018, C1022, SUS201,SUS410,SUS304,SUS316,A2-70,A2-80,A4-80
3. Size: #4x3/8''~~#14x8''
4. Nibs: have nibs under head or not, both ok
5. Coating: zinc plated Cr+6, zinc plated Cr+3, ruspert 500 HRS, ruspert 1000 HRS
6. Thread Type: Type BSD, Type ASD, Type CSD, with wings, with flute, with Notch
8. Drive: philips, square, pozi, torx , slot , Combined
9. Packing: bulk packing, small box packing, plastic box packing, as customer requirements
| Size | Diameter:ST2.9--ST6.3 | |
| Length: from 9.5mm--200mm | ||
| Material | 1.Stainless steel | SUS201,304,316,410 |
| 2.Carbon steel | C1018,C1022,C10B21,C10B33,C1035,C1045,C435#,40CrMo,42CrMo | |
| 3. Alloy steel | SCM435,C10B21,C10B33 | |
| 4. Iron | 1213,12L,1215, etc. | |
| Standard | DIN7504P | |
| Application | Building,Industry,Furniture,Sanitary,Electronics,Traffic. | |
2. Features:
3. 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.
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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 | ||
| Nominal | Threads | T | t | P | ||||
| Size or Basic | Per | Major Diameter | Minor Diameter | Protrusion | ||||
| Screw Diameter | Inch | Allowance | ||||||
| Max. | Min. | Max. | Min. | #2 Pt. | #3 Pt | |||
| 6 | 0.138 | 20 | 0.139 | 0.135 | 0.104 | 0.099 | 0.19 | — |
| 8 | 0.164 | 18 | 0.166 | 0.161 | 0.122 | 0.116 | 0.211 | — |
| 10 | 0.19 | 16 | 0.189 | 0.183 | 0.141 | 0.135 | 0.235 | 0.3 |
| 12 | 0.216 | 14 | 0.215 | 0.209 | 0.164 | 0.157 | — | 0.353 |
| 1/ 4 | 0.25 | 14 | 0.246 | 0.24 | 0.192 | 0.185 | — | 0.393 |
5. Advantages:
| 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 | we can 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 |
6. More pictures:
DIN7504P CSK HEAD SELF DRILLING TEK SCREWS
