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ASME B18.6.3 Self Tapping Screws , Self Threading Machinex Screws With Self Piecing Point
1. Applications:
Self-tapping screws have a wide range of tip and thread patterns, and are available with almost any possible screw head design. Common features are the screw thread covering the whole length of the screw from tip to head and a pronounced thread hard enough for the intended substrate, often case-hardened
For hard substrates such as metal or hard plastics, the self-tapping ability is often created by cutting a gap in the continuity of the thread on the screw, generating a flute and cutting edge similar to those on a tap. Thus, whereas a regular machine screw cannot tap its own hole in a metal substrate, a self-tapping one can (within reasonable limits of substrate hardness and depth).
2.Descriptions:
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 piecing 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 |
Thread | TypeA Thread, TypeAB thread, TypeB thread |
Drive | slotted, square, combination, torx |
Main market | USA, Europe, Russia, Africa, Chile |
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. Drawing Specifications:
Self tapping screw ASA TYPE AB(B) | |||||
sizes | thread No/P(T) | outer dia. | rolling dia. | ||
Max | Min | Max | Min | ||
No.0 | 48 | 1.52 | 1.44 | 1.25 | 1.20 |
No.1 | 42 | 1.90 | 1.82 | 1.60 | 1.55 |
No.2 | 32 | 2.23 | 2.13 | 1.80 | 1.75 |
No.3 | 28 | 2.56 | 2.46 | 2.05 | 2.00 |
No.4 | 24 | 2.89 | 2.79 | 2.30 | 2.25 |
No.5 | 20 | 3.30 | 3.20 | 2.60 | 2.55 |
No.6 | 20 | 3.53 | 3.43 | 2.85 | 2.80 |
No.7 | 19 | 3.91 | 3.78 | 3.15 | 3.10 |
No.8 | 18 | 4.21 | 4.09 | 3.40 | 3.35 |
No.10 | 16 | 4.80 | 4.65 | 3.90 | 3.85 |
No.12 | 14 | 5.46 | 5.31 | 4.40 | 4.35 |
1 / 4 | 14 | 6.25 | 6.10 | 5.20 | 5.15 |
5 / 16 | 12 | 8.00 | 7.82 | 6.75 | 6.70 |
6. 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 |
7 | Easy contact | skype and wechat: majestytom |
7. More Pictures for referance:
A2 A4 Philips Self Tapping Screws Pan Head Cold Forging With Tapping Thread