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Hexagon Head Screws with Metric Fine Pitch Thread - Product Grades A and B

Standard: NF E 25

Available sizes: M10 to M8 (4 sizes)

Equivalent Standards

Standard Body	Standard Number
EN	EN 28676
GB	GB /T 5786
DIN	DIN EN ISO 8676
ISO	ISO 8676

Dimensional Specifications (mm)

Size	P	k_max	k_min	s_max	s_min	ds_max	ds_min	k_nominal	ds_nominal
M10	1.5	8.51	21

Standard Versions

EN 28676 - 1991— Hexagon Head Screws with Metric Fine Pitch Thread - Product Grades A and B
NF E 25— Hexagon Head Screws with Metric Fine Pitch Thread - Product Grades A and B
ISO 8676 - 2011— Hexagon Head Screws with Metric Fine Pitch Thread - Product Grades A and B
ISO 8676 - 1999— Hexagon Head Screws with Metric Fine Pitch Thread - Product Grades A and B

Surface Treatment Recommendations

Zinc Plating (Zn)

Standard corrosion protection for indoor and mild outdoor environments.

Salt spray: 96–200 hours | RoHS compliant (trivalent chromium)

Zinc-Nickel Alloy (Zn-Ni)

High-performance coating for automotive, marine, and harsh environments.

Salt spray: 720–1500 hours | Recommended for grade 8.8+

Hot-Dip Galvanizing

Heavy-duty protection for structural and outdoor applications.

Salt spray: 500–1000 hours | Thread tolerance adjustment required

Note for high-strength fasteners (Grade 10.9, 12.9): Electroplating processes require hydrogen embrittlement relief baking (minimum 4 hours at 200°C within 4 hours of plating). Contact our engineering team for grade-specific plating recommendations.

Technical Specifications & Availability

Request detailed technical specifications, material certifications, and availability information for your application requirements. Our engineering team can provide product recommendations, custom specifications, and technical documentation.

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