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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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
6. Thread Type: Type BSD, Type ASD, Type CSD, with wings, with cutting thread
3. Applications:
Fixing sheet metal for roofs, carports, fencing, sheds, garages and more is as common an experience to tradies as it is to novice builders. And both types of builder need to save time and money for either business viability or more spare time.
For fixing sheet metal without the
need to predrill, see self-drilling screws—also known under the
proprietary name ‘Tek’ screws—for a better and faster way to get
the job done.
Available in a variance of head types, material compositions and
finishes, these screws have now become common place when thinner
metals need fixing to each other.
Self-drillers are identified by a point that is very like that of a drill bit, often including a scalloped unthreaded shaft section that helps to cut the metal quickly and smoothly.
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. | |||||||||||||
| Coarse Thread Self Drilling Screws – #3 Point | ||||||||||
| Nominal Size or | Threads | T | t | A | B | |||||
| Basic Screw | Per Inch | Major Diameter | Minor Diameter | Drill Point Length | Drill Point Diameter | |||||
| Diameter | Max | Min | Max | Min | Max | Min | Max | Min | ||
| 5/16 | 0.3125 | 12 | 0.315 | 0.307 | 0.272 | 0.263 | 0.421 | 0.361 | 0.27 | 0.265 |
| 3/8 | 0.375 | 12 | 0.38 | 0.37 | 0.308 | 0.298 | 0.354 | 0.314 | 0.338 | 0.33 |
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: 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:
DIN7504P CSK HEAD SELF DRILLING TEK SCREWS
