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Home / Connectors and Fasteners / EG Pengchi Grade 12.9 Nickel-Plated Socket Head Cap Screws, High-Strength Cylinder Head Bolts with Hydrogen Embrittlement Relief Plating
Connectors and Fasteners

Attributes

Brand -
Category Industrial Small Parts / Connectors and Fasteners
Origin -
Material Alloy Steel
Strength Grade 12.9
Surface Treatment Nickel Plated
Head Style Socket Cap Head
Drive Type Internal Hex
Thread Standard Metric Coarse
Compliance DIN 912 / ISO 4762
Brand EG Pengchi
Hardness 39-44 HRC
Special Process Hydrogen Embrittlement Relief

5 reviews

A

Anonymous

Apr 23, 2026

Rating: 5/5

Accurate Sizing

Threads match perfectly with standard nuts. Very precise manufacturing.

A

Anonymous

Apr 03, 2026

Rating: 5/5

Great Finish

Nickel plating looks professional and resists rust well in my workshop environment.

A

Anonymous

Mar 24, 2026

Rating: 5/5

Strong and Durable

Used these for high tension applications. No stripping occurred during installation.

A

Anonymous

Feb 27, 2026

Rating: 5/5

Reliable Brand

EG Pengchi never disappoints on strength specs. Will order again.

A

Anonymous

Feb 20, 2026

Rating: 4/5

Good Bulk Pack

One box had minor packaging damage but bolts were fine. Quality is solid.

5 FAQ

Q: Is this material stainless steel?

A: No, this is alloy steel with nickel plating for strength and corrosion resistance.

Q: Are mill test certificates available?

A: Yes, certificates are available upon request for bulk orders.

Q: What sizes are currently in stock?

A: We carry metric sizes ranging from M3 to M20.

Q: Where can I find torque specifications?

A: Please refer to standard torque charts for Grade 12.9 fasteners.

Q: How quickly does this ship?

A: Orders are typically processed and shipped within 24 hours.

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