GB9074.4-1988 Phillips Pan Head SEMS Screws

FULLERKREG supplies GB9074.4-1988 Phillips pan head SEMS screws (cross-recessed pan head combination screws) across four material and finish grades. Each assembly permanently captivates a flat washer (GB9074.24) and a spring washer (GB9074.26) on the screw shank, eliminating loose washer handling and accelerating assembly. Select your required material and strength grade below.

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GB9074.4 Phillips Pan Head SEMS Screws – Series Overview

GB9074.4-1988 Phillips Pan Head SEMS Screws – Steel (4.8) – Bright Zinc Plated
Low Carbon Steel A3  ·  Bright Zinc Plated  ·  Class 4.8  ·  M3–M8  ·  General-purpose panel fastening

GB9074.4-1988 Phillips Pan Head SEMS Screws – Alloy Steel (8.8) – Zinc Cr3
Alloy Steel 10B21  ·  Zinc Cr3 (Trivalent Chromate)  ·  Class 8.8  ·  M3–M8  ·  High-strength structural fastening

GB9074.4-1988 Phillips Pan Head SEMS Screws – Stainless Steel (A2)
Stainless Steel A2 (SUS304)  ·  Bright Pickled & Passivated  ·  A2-70  ·  M3–M8  ·  Corrosion-resistant general applications

GB9074.4-1988 Phillips Pan Head SEMS Screws – Marine Stainless Steel (A4)
Marine Stainless Steel A4 (SUS316)  ·  Bright Pickled & Passivated  ·  A4-70  ·  M3–M8  ·  Marine, chemical & high-chloride environments

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Material & Grade Selection Guide

Grade	Material	Finish	Strength	Corrosion Resistance	Typical Application
4.8 / Bright Zinc	Low Carbon Steel A3	Bright Zinc Plated	400 MPa	★★☆☆☆	General indoor panel fastening, appliances, furniture
8.8 / Zinc Cr3	Alloy Steel 10B21	Zinc Cr3	800 MPa	★★★☆☆	High-strength structural, electronics, semiconductor equipment
A2-70 / Passivated	Stainless Steel A2 (SUS304)	Pickled & Passivated	700 MPa	★★★★☆	Outdoor, food processing, medical, cleanroom
A4-70 / Passivated	Marine SS A4 (SUS316)	Pickled & Passivated	700 MPa	★★★★★	Marine, offshore, chemical plant, swimming pools

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Product Images

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About GB9074.4-1988 SEMS Screws

GB9074.4-1988 is the Chinese national standard defining cross-recessed pan head combination screws with pre-assembled plain washer and spring washer. The standard assembly is:

GB9074.4 = GB818 (Pan Head Screw) + GB9074.24 (Plain Washer) + GB9074.26 (Spring Washer)

The captive washer design eliminates loose washer handling, reduces part count from three to one, and is ideal for high-speed automated assembly. The pan head provides broad load distribution; the Phillips drive is compatible with standard power tools and automated screwdriving systems.

Why FULLERKREG?

• 🏭 Direct manufacturer — full control over material, heat treatment, and surface finishing across all grades
• 📐 Standard-compliant — manufactured to GB9074.4-1988 with full dimensional traceability
• 🌍 Global supply — export packaging, English documentation, worldwide logistics
• 📦 Bulk & wholesale ready — bulk bags, boxes, or custom OEM packaging available
• 💬 Engineering support — custom sizes, materials, and special specifications on request

Contact FULLERKREG for volume pricing, custom specifications, or technical support.