Product Description
M3.5 × 0.6mm A4 marine-grade stainless-steel socket cap set screws, fully threaded and available in a choice of lengths from 5mm to 30mm.
These corrosion-resistant metric screws feature a cylindrical socket cap head with an internal hexagon drive. The less-common M3.5 thread size is suitable for specialist machinery, instruments, automotive components, electrical equipment, restoration projects and assemblies where standard M3 or M4 fasteners are unsuitable.
- Thread size: M3.5
- Thread pitch: 0.6mm metric coarse
- Threading: Fully threaded
- Available lengths: 5mm, 6mm, 8mm, 10mm, 12mm, 16mm, 20mm, 25mm and 30mm
- Head style: Cylindrical socket cap head
- Drive type: Internal hexagon / Allen key
- Material: A4 stainless steel
- Stainless designation: Commonly comparable to 316 stainless steel
- Finish: Natural stainless-steel finish
- Traditional socket-cap designation: DIN 912 pattern
- Modern socket-cap designation: ISO 4762 pattern
- Pack sizes available: 5, 10, 20, 50, 100, 250, 500 and 1000
These M3.5 socket cap screws are suitable for specialist machinery, instruments, automotive and motorcycle components, electrical equipment, model engineering, restoration projects, brackets and general maintenance applications.
The M3.5 × 0.6mm metric coarse thread must be used with a corresponding M3.5 × 0.6mm nut, threaded insert or tapped hole. M3.5 is an intermediate metric diameter and is not interchangeable with M3, M4 or imperial thread forms.
The fully threaded construction provides thread engagement along the usable length beneath the head. This is useful in assemblies with thin components or where the screw must engage deeply into a tapped hole without requiring a plain unthreaded shank.
A4 stainless steel contains molybdenum and offers improved resistance to moisture, salt spray and many corrosive conditions compared with A2 stainless steel. It is commonly selected for marine, coastal, food-processing and exterior applications.
The term “marine grade” describes the improved corrosion resistance of A4 stainless steel but does not mean that the fastener is immune to corrosion in every environment. Exposure conditions, temperature, chemicals, surface contamination and contact with dissimilar metals can all affect service life.
Stainless-steel threaded fasteners can suffer from thread galling or cold welding, particularly when installed quickly, tightened dry or used with a stainless-steel mating thread. A suitable anti-seize compound and controlled installation speed may help reduce this risk.
The internal hexagon drive allows installation in confined spaces where access for an external spanner may be limited. Use a correctly fitting Allen key or hex socket bit and ensure it is inserted fully before applying torque.
Socket cap screw length is measured from directly beneath the cylindrical head to the end of the screw. The head itself is not included in the stated length.
| A | B | C | D | E | F |
| 3.5mm | 10mm | * | * | * | 0.6 |
| 3.5mm | 12mm | * | * | * | 0.6 |
| 3.5mm | 16mm | * | * | * | 0.6 |
| 3.5mm | 20mm | * | * | * | 0.6 |
| 3.5mm | 25mm | * | * | * | 0.6 |
| 3.5mm | 30mm | * | * | * | 0.6 |
| 3.5mm | 5mm | * | * | * | 0.6 |
| 3.5mm | 6mm | * | * | * | 0.6 |
| 3.5mm | 8mm | * | * | * | 0.6 |
Please Note: Specifications given are intended as a guide only. If critical to your project please check with us first.
