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A2 Stainless Steel Ball Plunger Screw Spring Loaded M5 Hex Socket Set Screws
Plunger screw is another name of set screw with ball point , it is one of the set screws or grub screws and specially designed for machinery like different molds or tools , clamps and assembly related location etc .
Plunger screws are comprised of a round ball ,screw and spring . spring is insert into screw hole and then a round ball is put into hole of screw under pressure .
Stainless steel plunger screws are used for medium heavy duty and do not need to be assembled working pieces seperately .
Material
Stainless steel A2-70
Finish
Passivaiton with ASTM A 967-2005
Surface requested
Roughness 3.2 , no burrs or scratch and no sharp edges .
Specific dimension
| Thread | |
| Length | |
| Ball diameter | |
| Socket depth | |
| Socket width |
More standard specifications
| Thread | Length | socket | ball diameter | ball head height |
| M3 | 3-6 | 1.5 | 1.5 | 0.5 |
| M4 | 5-10 | 2 | 2.4 | 0.65 |
| M5 | 8-12 | 2.5 | 2.5 | 0.8 |
| M6 | 10-16 | 3 | 3.5 | 1 |
| M8 | 10-20 | 4 | 5 | 1.5 |
| M10 | 16-25 | 5 | 6 | 1.8 |
| M12 | 18-36 | 6 | 8 | 2 |
For over M12 dimensions , can be refered to DIN 916 set grub screw
| d | p | t | S |
| 12 | 1.75 | 4.8 | 6 |
| 14 | 2 | 5.6 | 6 |
| 16 | 2 | 6.4 | 8 |
| 18 | 2.5 | 7.2 | 10 |
| 20 | 2.5 | 8 | 10 |
| 22 | 2.5 | 9 | 12 |
Mechanical Properties
| Hardness ( HV ) | 210 | Yield Strength ( Mpa ) | 320 | Elongation ( % ) | 35 |
| Tensile Strength ( Mpa ) | 560 | Torque | 8 | Reduction Area ( % ) | 45 |
Tips for use
1 . Stainless steel plunger screws can not be used for temperature over 250 degree .
2 . Not suitable for hard acid conditions
3 . Working load not exceed 7 N .