410 420 Ellow Zinc Needle Point Pan Head Tek Screws With Tapping
Thread DIN7981
1. Description:
The ability of a screw to advance when turned, while creating its
own thread versus, say, machine screws which require a pre-threaded
nut or other female insert. Self-Tapping screws can cut their own threads as the screw is driven in to the
material. They function by having a cutting edge which drills away
the material, making a tiny hole for the screw to go into. This has
nothing to do with the point of the screw but has everything to do
with the threads which are designed to cut through the material.
2. Specifications:
1. Name: DIN7981 A2 A4 Philips Self Tapping Screws Pan Head With
Tapping Thread
2. Grade: C1018, C1022, SUS201,SUS304,SUS316,A2-70,A2-80,A4-80
3. Size: 2.9mmx10mm--6.3x100mm
4. Standard: DIN7981
5. Certification: ISO9001, SGS, CTI, ROHS
Product Name | DIN7981 pan head self tapping screws |
Material | stainless steel, carbon steel, alloy steel |
Color | yellow zinc, black phosphate, gray, white zinc, HDG, ruspert,
nickel and so on |
Standard | DIN GB ISO JIS BA ANSI |
Grade | C1018, C1022, SUS201, SUS304, SUS316, A2-70, A2-80, A4-80, 4.8 6.8
8.8 10.9 12.9 |
Brand | Crever Or customer own brand |
Drive | slotted, square, combination, torx |
Used | building industry machinery, decration, eletronical industry, wood
and so on |
3. Chemical composition of stainless steel (screws, bolts)
| 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. Technical specifications:
| Dia | Standard | Head Thickness Max | Head Dia Max | m approx. | Cross recess No. |
| 2.2 | | 1.80 | 4.20 | 2.60 | H1 |
| 2.9 | #4 | 2.20 | 5.60 | 3.00 | H1 |
| 3.5 | #6 | 2.60 | 6.90 | 4.20 | H2 |
| 3.9 | #7 | 2.80 | 7.50 | 4.40 | H2 |
| 4.2 | #8 | 3.05 | 8.20 | 4.60 | H2 |
| 4.8 | #10 | 3.55 | 9.50 | 5.00 | H2 |
| 5.5 | #12 | 3.95 | 10.80 | 6.50 | H3 |
| 6.3 | #14 | 4.55 | 12.50 | 7.10 | H3 |
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
6. Pictures for more referance:
A2 A4 Philips Self Tapping Screws Pan Head Cold Forging With
Tapping Thread
