M6 x 40mm coach screw in A2 stainless steel to DIN 571. Heavy-duty wood-thread fastener for structural timber-to-timber and timber-to-steel connections, driven with a spanner or socket rather than a screwdriver. A2 (304 grade) gives good corrosion resistance for indoor and non-coastal outdoor use. Free next-day UK delivery on orders over £50.
  • 6mm x 40mm hex head coach screw A2 stainless DIN 571
  • DIN 571 hex coach screw 6mm x 40mm A2 stainless steel, side profile
  • Hex head detail - 6mm x 40mm A2 stainless coach screw DIN 571
  • Simfix product label - 571A206040PK10-SIM
  • Simfix product label - 571A206040PK50-SIM
6mm x 40mm hex head coach screw A2 stainless DIN 571
DIN 571 hex coach screw 6mm x 40mm A2 stainless steel, side profile
Hex head detail - 6mm x 40mm A2 stainless coach screw DIN 571
Simfix product label - 571A206040PK10-SIM
Simfix product label - 571A206040PK50-SIM

Simfix

Hexagon Coachscrew DIN 571 A2 Stainless Steel (6 X 40)

SKU 571A206040PK10-SIM
£9.60
Pack size:
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M6 x 40mm coach screw in A2 stainless steel to DIN 571. Heavy-duty wood-thread fastener for structural timber-to-timber and timber-to-steel connections, driven with a spanner or socket rather than a screwdriver. A2 (304 grade) gives good corrosion resistance for indoor and non-coastal outdoor use. Free next-day UK delivery on orders over £50.
£9.60
6mm x 40mm hex head coach screw A2 stainless DIN 571 DIN 571 hex coach screw 6mm x 40mm A2 stainless steel, side profile Hex head detail - 6mm x 40mm A2 stainless coach screw DIN 571 Simfix product label - 571A206040PK10-SIM Simfix product label - 571A206040PK50-SIM
6mm x 40mm hex head coach screw A2 stainless DIN 571 DIN 571 hex coach screw 6mm x 40mm A2 stainless steel, side profile Hex head detail - 6mm x 40mm A2 stainless coach screw DIN 571 Simfix product label - 571A206040PK10-SIM Simfix product label - 571A206040PK50-SIM

This 6mm x 40mm hex head coach screw (lag bolt) is manufactured to DIN 571 in A2 stainless steel (304 grade). DIN 571 specifies a large hex head with a coarse wood-screw thread and gimlet point, driven with a spanner or socket rather than a screwdriver. The coarse thread provides high pull-out resistance in softwood and hardwood alike - making this the standard heavy-duty fastener for structural timber connections, post bases, brackets, and large landscaping projects. A clearance hole slightly larger than the plain shank diameter should be pre-drilled before installation.

Typical applications

  • Timber-to-timber and timber-to-steel structural connections
  • Fence posts, gate frames, and agricultural timber work
  • Garden structures, pergolas, and heavy-duty outdoor joinery
  • Structural brackets, deck support posts, and landscape timber fixings

Available in packs of 10 to 50, with free next-day UK delivery on orders over £50 and 30-day no-quibble returns.

Fastener styleHexagon head coach screw
StandardDIN 571
MaterialA2 stainless steel (304)
Property classA2
Thread sizeM6
Length40 mm
Head typeHex
Drive typeExternal hex (spanner)
Surface finishPlain (no plating)
HS commodity code7318121090
Recommended useOutdoor

RoHS and REACH compliant.

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