DIN 316 Wing Screw with Round Wings

The German standard DIN 316 covers a wing screw with round wings. It differs from other types of fasteners in its head shape: two metal wings are designed for hand loosening and tightening without tools. These screws are used for quick-release connections and are applied in instrument making, machine tool building and other industrial sectors.

Design features, materials and advantages

Wing screws of this standard are designed for installation into a pre-tapped threaded hole. Thread diameter ranges from M6 to M24, tolerance class 6g. The length of the threaded part ranges from 6 to 60 mm.

The main feature is the metal wings, convenient for manual grip. Hand tightening does not produce high clamping force, so these screws are not used for critical load-bearing joints. The thread has a coarse pitch to speed up tightening.

The following materials are used to manufacture wing screws:

• Malleable cast iron — resistant to vibration.
• Carbon steels without protective coating.
• Brass — an alloy of copper and zinc.
• Austenitic acid-resistant steels A2 and A4 — for environments with increased corrosive activity.
• Zinc-coated steel.

Application options

These fasteners are used where a joint needs to be quickly assembled and disassembled without hand tools: in instruments, machine tools and other industrial equipment. Manufacturing from corrosion-resistant materials allows the screws to be used in environments with increased chemical activity.

Dimensions of DIN 316 wing screws, mm

e min	18	24	30	36	48	62
h min	8.5	11	15	18	23	31
m min	3.2	4	5	6.5	8	10
l	d
	M4	M5	M6	M8	M10	M12
16
20
25
30
40