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KHP dowel screw with functionality in case of fire. Fire resistance up to 90 minutes. Ideal connection for anchoring in aerated concrete (KVP screw + KHP dowel + 67XX_PO clamp). Furthermore, the screws can be used in chipboard, wood, and other materials. Cross recessed countersunk head screw PZ. Reliable use for all wooden materials. Box 500 pcs.