CA M2–M3 304 Stainless Steel Cross Ultrathin Flat Wafer Head Self-Tapping Screw

Ultra-low-profile flat wafer head self-tapping screws in M2 and M3 metric sizes, manufactured from 304 stainless steel (A2) for corrosion resistance. The CA-type wafer head has an exceptionally thin head profile — significantly lower than a standard pan head or countersunk head — making these screws ideal for fastening thin plastic panels, PCB mounting brackets, electronics enclosures, and sheet metal assemblies where head clearance is critical. Phillips (cross) drive for standard screwdriver and power tool compatibility.

Technical Specifications

Parameter	Value
Material	304 Stainless Steel (A2)
Head Type	CA ultrathin flat wafer head (low-profile)
Drive Type	Phillips (cross / PH)
Thread Type	Self-tapping (Type AB / ST)
Sizes Available	M2, M3 (diameter × length as selected)
Finish	Natural (passivated 304 SS)
Corrosion Resistance	Excellent (304 SS, suitable for indoor and mild outdoor use)
Certification	RoHS

Size Selection Guide

Size	Pilot Hole	Typical Application
M2 × 4mm	1.5mm	PCB mounting, thin plastic panels, electronics enclosures
M2 × 6mm	1.5mm	Thin sheet metal, ABS plastic housing assembly
M3 × 6mm	2.5mm	Aluminium extrusion panels, 3D printed parts, enclosure lids
M3 × 8mm	2.5mm	Thicker plastic panels, PCB standoff mounting
M3 × 10mm	2.5mm	Sheet metal brackets, electronics rack panels

Typical Applications

PCB Mounting: Secure PCBs to plastic or metal enclosure bases with M2 or M3 wafer head screws where standard pan head screws would foul adjacent components
Electronics Enclosures: Assemble ABS, polycarbonate, and aluminium electronics enclosure lids and panels with low-profile screws that sit flush with thin panel surfaces
3D Printed Parts: Self-tap into PLA, PETG, and ABS 3D printed parts for M2/M3 threaded connections without heat-set inserts
Thin Sheet Metal: Self-tap into 0.5–1.5mm steel and aluminium sheet metal for panel assembly, bracket mounting, and cover plate fastening
Consumer Electronics Repair: Replace stripped or damaged M2/M3 screws in laptops, tablets, cameras, and consumer electronics with matching stainless steel wafer head screws

FAQ

Q: What is the difference between a wafer head and a pan head screw?
A: A wafer head (CA type) has a much thinner, wider head than a standard pan head — typically 40–50% lower profile. This allows the screw to sit closer to the surface in applications where head height clearance is limited.

Q: Can these screws be used in aluminium?
A: Yes. M2 and M3 self-tapping screws work well in aluminium sheet (0.8–2mm) and aluminium extrusion panels. Drill a pilot hole 0.2–0.3mm smaller than the screw minor diameter for best thread engagement.