DIN 551 Set Screw with Slotted Head and Flat Point
FLOK supplies DIN 551 set screws with slotted head and flat point: M2–M12, 14H steel, A2/A4, non-ferrous alloys, plastic, electroplated coatings.
DIN 551 governs the manufacture of set screws. These fasteners are metal rods with metric thread along their full length. One end has a slot machined into it for tightening the screw with a flat-blade screwdriver.
The other end of the screw is flat. Cylindrical fasteners of this type are designed to secure parts relative to each other, preventing their displacement during mechanism operation.
Manufacturing and application features
DIN 551 set screws are used in mechanical engineering, automotive manufacturing, and the assembly of aircraft, machine tools, and other mechanisms and units. They are also used in construction and the assembly of metal frames and other structures. The fasteners are known for their strength and resistance to mechanical stress.
The screws are designed to provide a secure joint between parts and prevent displacement under dynamic and vibration loads. The screw is installed in a prepared hole and sits completely flush with the material since it has no protruding head. It can also be used together with washers and nuts of the corresponding diameter. Equivalent fasteners are manufactured under the Russian standard GOST 1477-93 and the international standard ISO 4766.
The thread diameter can range from M2 to M12, and the product length from 3 to 80 mm. The main material is steel with property class 14H; to improve corrosion resistance it is given a zinc, phosphate, chrome or nickel electroplated coating. This coating increases resistance to high humidity, temperature fluctuations and other aggressive external conditions. For highly corrosive environments, screws made of acid-resistant stainless steel A2 and A4 are used.
They can also be made from non-ferrous metal alloys and plastic. Such products are not susceptible to corrosion, which ensures long service life in demanding conditions. Plastic screws can be used for assembling frames outdoors.
Ordering products from FLOK
FLOK supplies DIN 551 fasteners (the GOST 1477 screw is a full equivalent) from Russian and international manufacturers. The fasteners comply with the standards, are made of quality materials and are designed for long-term use under high loads.
Dimensions of DIN 551 set screws, mm:
| n | 0.25 | 0.4 | 0.4 | 0.6 | 0.8 | 1 | 1.2 | 1.6 | 2 | |
|---|---|---|---|---|---|---|---|---|---|---|
| t min | 0.64 | 0.72 | 0.8 | 1.12 | 1.28 | 1.6 | 2 | 2.4 | 2.8 | |
| t max. | 0.84 | 0.95 | 1.05 | 1.42 | 1.63 | 2 | 2.5 | 3 | 3.6 | |
| dp | 0.75 | 1.25 | 1.75 | 2.25 | 3.2 | 3.7 | 5.2 | 6.64 | 8.14 | |
| l | d | |||||||||
| M2 | M2.5 | M3 | M4 | M5 | M6 | M8 | M10 | M12 | ||
| DIN 551 set screw | 4 | |||||||||
| DIN 551 set screw | 5 | |||||||||
| DIN 551 set screw | 6 | |||||||||
| DIN 551 set screw | 8 | |||||||||
| DIN 551 set screw | 10 | |||||||||
| DIN 551 set screw | 12 | |||||||||
| DIN 551 set screw | 15 | |||||||||
| DIN 551 set screw | 16 | |||||||||
| DIN 551 set screw | 20 | |||||||||
| DIN 551 set screw | 25 | |||||||||
| DIN 551 set screw | 30 | |||||||||
| DIN 551 set screw | 35 | |||||||||
| DIN 551 set screw | 40 | |||||||||
| DIN 551 set screw | 45 | |||||||||
| DIN 551 set screw | 50 | |||||||||
| DIN 551 set screw | 60 | |||||||||
| DIN 551 set screw | 70 |
See also
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DIN 85 Pan Head Screw, Slot
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DIN 7500 Thread-Forming Screws
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DIN 964 Raised Countersunk Head Screw (Slotted)
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DIN 915 Set Screw with Cylindrical Point
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DIN 7984 Low Head Screw
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DIN 553 Slotted Set Screw with Cone Point
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DIN 316 Wing Screw with Round Wings
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DIN 966 Raised Countersunk Head Screw (Cross Recess)
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