M5 Countersunk Screws: Material Grades (Stainless Steel 304 vs Zinc-Plated Steel)
Engineering Overview: Technical specifications for M5 metric cylinder retaining screws, evaluating thread pitch, head countersink angles, and grade 8.8 tensile strength.
Technical & Engineering Specifications
| Thread Pitch | M5 x 0.8 mm Metric Standard |
|---|---|
| Fastener Type | DIN 965 / ISO 7046 M5 Countersunk Flat Head Screw |
| Length Options | 65 mm, 70 mm, 75 mm, 80 mm, 85 mm |
| Material Options | Stainless Steel SUS304 vs Grade 8.8 Zinc Steel |
Fastener Specifications
The lateral M5 screw anchors the lock cylinder to the mortise lockcase faceplate.
Material Grades & Dimensions
- Thread Specification: Metric M5 x 0.8 mm pitch.
- Length Range: 65 mm, 70 mm, 75 mm, 85 mm countersunk flat head (90°).
- Stainless Steel SUS304: Specified for exterior and coastal doors to prevent screw head rusting and seized extraction.
- Grade 8.8 High-Tensile Steel: Provides 800 MPa tensile strength, resisting shear under forced pulling.
Frequently Asked Engineering & Selection Questions
Q1: What size is the fixing screw on a Euro profile cylinder?
It is an M5 x 0.8 mm metric countersunk flat-head screw, typically 65 mm to 85 mm in length.