Round head screw with square neck and nut

Name: Round head screw with square neck and nut
Brand: Würth
SKU: 435718 40

DIN 603 steel 4.8 hot dip galvanized with nut
SCR-MHD-DIN603-NUT-4.8-(HDG)-M8X40

Art.-no. 435718 40

EAN 4099619349606

All versions

Specification

DIN 603, steel 4.8, hot-dip galvanised (TZN), with nut

The flat square neck fixes the round head screw e.g. in a slot and allows tightening from the nut side without counter-tensioning.

Use in wood construction, especially carpenter's workshops, pre-fabricated house construction, vehicle construction (e.g. truck load platforms), boat building, trade fair construction, scaffolding construction, for heavy, demountable transport racks or machine crates and transport crates for sea transport. Used to join wooden parts or wood and metal parts. The square neck is sunk into the wood. Hole diameter is dependent on thread dimension. For joining wood to wood, a larger washer must be placed under the nut, e.g. a wood construction washer.

Technical information


Thread type x nominal diameter (d₁)	M8
Length (l₁)	40 mm
Material	Steel
Property class	4.8
Surface	Hot dip galvanized
Head diameter (d_k)	20.65 mm
Head height (k₁)	4.88 mm
Square width (V)	8.58 mm
Square height (f)	5.6 mm
Standards	DIN 603
RoHS-compliant	Yes
Design	With nut
Head type	Cup head square neck
Head details	With square neck
Thread type	Metric thread
Pitch	1.25 mm
Thread form	Standard metric thread
Shank diameter	10 mm
Thread length (metric thread) (b)	22 mm
Product class	C