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As a professional metal stamping die maker in China, Changdong produces: Progressive Dies, Transfer dies, single stage dies & gang dies.
Sales Manager: Ms. Alice
Metal Stamping Processing
Manufacturing various kinds of metal stamping parts,range from 45T to 800T,up to 4 meters.
Metal Stamping Dies
Professional die maker produces all kind of stamping dies,stamping tools,metal stamping tooling,auto dies,automotive dies.
Welcome to order the large and small size mechanical machining parts, stamping die components, as well as metal stamping prototypes.
Changdong also helps the customers to order the Checking Fixtures for automotive stamping parts and other stamping parts.
Screw specification and standards summaryProfessional stamping die maker in China, Changdong Tool & Die company use all kind of Level-12.9 Screws, both Metric and Inch standard.1. Type of thread:A: Triangular thread (60 degrees) : Bonding / lockingB: Triangular thread for pipe (55 degrees): Bonding / lockingC: trapezoidal thread (30 or 29 degrees): power transmissionD: square thread (90 degrees): power transmission2. Common types of screws:A: Machine ScrewB: Self-tapping screws (used in metal and used in plastic)B-1: Sheet Metal Tapping Screw.B-2: Plastic Tapping Screw. (for plastic, self-tapping screws)C: Wooden ScrewD: Cement Wall Screw3.General Screw Materiala.Low Carbon Steelb. SS-304c.Stainless Steel 302d. Aluminum 5052d. Brasse. Bronzef. UNS C11000 Copper4.Common screw specifications and markings:A: metric screwB: US standard screwC: inch screwA: Metric mechanical screw:Ex: M3 x 6 – P P B : M3 machine screw, 6mm long, cross, round flat head, black plated.Finish Code: Appearance Processing SpecificationsHead Code: Head shapeThread CodeScrew Model Drive Code: Head section groove, feature modelLength Code: Screw length (mm)A-1: Thread Code: Screw ModelThe metric screw directly indicates the screw type with the outer diameter of the screw.For example, M3 means the outer diameter of the screw is 3.00mm.; M4 means the outer diameter of the screw is 4.00mm.Metric Thread Size x Pitch:Note: The metric screw is located behind the screw model and sometimes indicates the screw pitch.such as M3x0.5, M4x0.70, M5x0.8, M6x1.But because of the standard specification, it is usually not mentioned.A-2: Length Code: Screw length:Metric screw, directly indicating the length of the screw, the unit is mm.The total length of the screw is marked, only the length below the head is calculated, and the head height is not included.The exception is the flat head screw, the total length of the screw is marked with the head height.A-3: Drive Code/ head section, feature.Commonly used specifications are as follows:a. Slotted: One word ( Minus )b. Phillips: Cross (Plus)c. Phil-Slot: word/crossd. Hex Scoket: Hexagone. One Way: One way (only lockable, not quit)A-4: Head Code/ Head shape.Commonly used specifications are as follows:a. Flat: flat head (after locking, the top is flush with the work piece)b. Oval: Salad headc. Round: round headd. Pan: Round flat heade. Truss: big round flat headf. Hex: Hex head.A-5: Finish Code/ Appearance Processing.Commonly used specifications are as follows:a. Z: Zine-Plated: galvanizedb. Ni: Ni-Plated: Nickel platingc. Tin-Plated: Tin platingd. Zine Plated / Green Iridite: galvanized green film treatment.e. Radiant Plated: Multicoloredf. Passivate: Antioxidant treatment.g. Alodial Finish: No appearance treatmentMetric self-tapping screws: directly mark the Tapping Type.Ex: M3 x 6 –PPB, Tapping Type:M3 self-tapping screws, 6mm long, cross, round flat head, black plated.Generally used as a product or label, and then judged to be used in Sheet Metal or plastic parts.B: US standard screw.a. Generally marked with a number, such as #2-56, #4-40, #6-32, #8-32, #10-24...etc.b. or expressed in English outer diameter,Such as 0.086-56, 0.112-40, 0.138-32, 0.164-32, 0.190-24...etc.Ex: 632 – 8 – P P B:Finish Code: Appearance Processing SpecificationsHead Code: Head shapeDrive Code: Head section, feature modelLength Code: Screw lengthThread Code: Screw ModelB-1: Thread Code: Screw ModelCommonly used specifications are as follows:a. #2-56 (0.086-56): 2 Fan 56 teethb #4-40 (0.112-40) : 4 番 40 teethc. #6-32 (0.138-32) : 6 32 teethd. #8-32 (0.164-32) : 8 Fan 32 teethe. #10-24 (0.190-24): 10 Fan 24 teethB-2: Length Code: Screw lengthThe length of the US standard screw must be converted to the metric mm size.Conversion formula: (Length Code / 32) x 25.40 = metric length mmB-3, B-4, B-5: The marking method is the same as the metric system.
Stamping Dies | Metal Stamping | Stamping Parts | Sheet Metal PartsC: Inch screw:C-1: Thread Code:The mark will be the denominator of 8, and then directly called the number of the molecule.Ex: 1/8 x 0.50 –PPB: 1 split screw x 0.50” long, PPBEx: 5/16 x 0.50 –PPB = 2.5/8 x 0.50-PPB : 2 points half-screw x 0.50” long, PPBEx: 5/32 x 0.50 –PPB =1.25/8 x 0.50-PPB: 1 minute 2 PCT half screw x 0.50” long, PPBEx: 1/4 x 0.50-PPB= 2/8 x 0.50-PPB: 2 teeth screw x 0.50” long, PPBNote: Sometimes it will mark coarse or fine teeth.UNF: Fine teeth: The electronics industry is more common.UNC: Coarse teeth: Heavy mechanical structures are more common.Ex: 3/8 x 0.50 , UNF –PPB: 3 points fine screw x 0.50” long, PPB.C-2: Length Code:For the English mark, it must be multiplied by 25.40 to convert to mm
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Dongguan Changdong Tool & Die Co., Ltd © copyright Add：NO. 56-B, Fuming South Road, Dalang, Dongguan, P.R.C
Sales Manger: Ms. Alice E-mail：firstname.lastname@example.org Tel：0086-769-8106 1256 0086-769-8106 1826-807 Fax：0086-769-8106 1926
Changdong is a professional stamping dies maker in China, including progressive dies and transfer dies. We also produce stamping parts & mechanical processing parts, and help the customers to order the checking fixtures.