Assembled Bolt Set Grade 8.8 Bright Zinc Plated CE

The Assembled Grade 8.8 Bright Zinc Plated CE Bolt Set is a high‑tensile, CE‑marked fixing solution designed for structural, mechanical and general engineering applications where strength, reliability and compliance are essential.

Each set includes matched bolts and nuts (and, where specified, washers), manufactured from Grade 8.8 high‑tensile steel and finished in a bright zinc plated (BZP) coating for excellent corrosion resistance and a clean, professional appearance.

Engineered to meet relevant European technical standards (typically in line with EN ISO 898‑1 for the mechanical properties of carbon steel fasteners and applicable CE requirements such as EN 15048 for non‑preloaded structural bolting assemblies), this assembled bolt set is ideal for:

• Steel‑to‑steel connections in structural frames and brackets
• Timber‑to‑steel connections, including C24 structural timber when correctly designed
• Plant, machinery and equipment installation
• Automotive, agricultural and fabrication work

Always refer to your project specification, structural engineer’s design and local building regulations to confirm suitability and required standards.

Detailed Technical Information

Material:

• Carbon steel, Grade 8.8 high‑tensile

Finish:

• Bright Zinc Plated (BZP) for corrosion resistance in internal and covered external environments

Mechanical Properties (Typical for Grade 8.8 – to EN ISO 898‑1):

• Property class: 8.8
• Tensile strength: approx. 800 N/mm²
• Yield strength: approx. 640 N/mm²

Standards & Compliance (Typical):

• Mechanical properties in line with EN ISO 898‑1 (Bolts, screws and studs – carbon steel)
• Bolting assemblies for non‑preloaded structural connections typically in line with EN 15048 (where specified on the pack and documentation)
• CE marked in accordance with applicable EU Construction Products Regulation (CPR) requirements

Head Type:

• Hexagon head – suitable for standard metric spanners and sockets

Thread Type:

• Metric coarse thread (e.g. M8, M10, M12, etc., depending on pack)

Supplied As:

• Assembled bolt + nut (and, where applicable, flat washer and/or spring washer)

Always check the specific pack label or technical data sheet for exact sizes (e.g. M8 x 60mm), thread pitch, and included accessories.

Grade 8.8 Bright Zinc Plated CE Bolt Set Typical Use Cases

Structural & Construction

• Fixing steel brackets, plates and cleats to beams and columns
• C24 timber to steel connections, e.g.:
  • Timber beams bolted to steel end plates
  • Timber ledgers fixed to steel frames
  • Floor and roof members connected via steel shoes and hangers (where bolted)
• Non‑preloaded structural connections in steelwork, in line with EN 15048 assemblies where applicable

Engineering & Fabrication

• Joining fabricated steel frames, guards, machine bases and supports
• Bolted joints in workshop fabrications, handrails and balustrades (where Grade 8.8 is specified)
• Securing equipment, jig fixtures and industrial racking

Mechanical, Agricultural & Automotive

• Plant and machinery installation and maintenance
• Agricultural equipment repairs and upgrades (e.g. brackets, linkages, chassis mounts)
• Automotive applications where high‑tensile, metric bolts are required (excluding safety‑critical applications unless specifically approved)

General Maintenance & Heavy‑Duty DIY

• Upgrading under‑strength fixings to stronger, Grade 8.8 bolts
• Fixing heavy gates, hinges, anchors, and structural brackets
• Repairs to trailers, frames, and heavy garden structures

Installation Guide & Best Practice

For a safe, durable installation, follow these general principles (always defer to design specifications and manufacturer instructions):

1. Planning & Preparation

• Confirm specification:
  • Check that bolt diameter, length, and Grade 8.8 are correct for your project.
  • Confirm CE requirements and relevant EN standards with your structural engineer or project designer.
• Select correct washers (if needed):
  • For C24 structural timber, use suitable washers or load‑spreading plates to prevent the bolt head or nut from crushing into the timber.
• Check substrate & alignment:
  • Ensure steel plates are flat and properly aligned.
  • Pre‑drill timber and steel using the correct clearance holes based on bolt diameter.

2. Drilling & Hole Sizing

• Follow design/specification, but as a general guide:
  • Timber: Hole diameter typically equal to bolt diameter or slightly larger, to allow insertion without excessive play.
  • Steel: Clearance holes normally a slightly larger diameter than the bolt (e.g. Ø9mm for M8, Ø11mm for M10), following relevant design standards.
• Deburr holes in steel to ensure full contact with washers and bolt heads.

3. Assembly

1. Insert the bolt through the prepared holes (e.g. steel plate → timber member → steel plate).
2. Place a flat washer under the nut and/or head where required, especially in timber connections.
3. Hand‑tighten the nut until all components are snug and correctly seated.

4. Tightening & Torque

• Use a spanner or socket of the correct size for the hex head and nut.
• Where specified, use a torque wrench to achieve the recommended torque for the bolt size and Grade 8.8 rating. (Torque values vary by diameter, lubrication and application – refer to a reliable torque chart or engineer’s specification.)
• For structural connections:
  • Tighten bolts in a systematic pattern (e.g. opposite corners first) to ensure even load distribution.
  • Avoid over‑tightening, which can crush timber, deform plates or stretch bolts.

5. Inspection & Maintenance

• After installation, check:
  • All bolts are fully seated with threads protruding beyond the nut.
  • Washers (if used) are flat and not distorted.
• Periodically re‑check critical connections (e.g. vibrating machinery, structural joints) for tightness and signs of corrosion or movement.

Grade 8.8 Bright Zinc Plated CE Bolt Set Expanded FAQs

Q1. What is the difference between a Grade 8.8 bolt and a standard mild steel bolt?

A:

A Grade 8.8 bolt is a high‑tensile fastener with significantly higher yield and tensile strength than a typical mild steel (e.g. 4.6) bolt. In simple terms:

• Stronger under load – resists stretching and failure better.
• Better for structural and mechanical applications where loads, vibration or dynamic forces are present.
• Helps reduce the number or size of bolts required in some engineered designs (subject to calculation).

For lightly loaded, non‑critical fixings, a mild steel bolt may be adequate, but for structural steelwork, timber connections, machinery and C24 timber applications, Grade 8.8 is commonly specified.

Q2. Can I use bright zinc plated Grade 8.8 bolts outside or in damp conditions?

A:

Yes, bright zinc plated (BZP) bolts offer a good level of corrosion resistance, making them suitable for:

• Internal environments (dry and heated)
• Covered external areas (e.g. under canopies, carports, sheltered frames)
• Mildly damp or intermittent exposure

For very harsh, constantly wet, marine or chemically aggressive environments, consider:

• Hot‑dip galvanised bolts for improved corrosion resistance, or
• Stainless steel fasteners where compatible and structurally appropriate.

Q3. Are these Grade 8.8 CE‑marked bolts suitable for C24 structural timber?

A:

Yes – when correctly designed and installed, Grade 8.8 CE‑marked bolts are widely used to form bolted connections in C24 structural timber, for example:

• Fixing timber beams to steel plates
• Connecting C24 joists, posts and beams via bolted steel brackets
• Forming timber‑to‑timber joints using steel side plates

When using these bolts with C24 timber:

• Follow design rules in Eurocode 5 (EN 1995‑1‑1) or local building codes.
• Use appropriate washers or load‑spreading plates to avoid crushing the timber fibres.
• Ensure the bolt diameter and spacing meet the structural engineer’s specification.

Q4. What technical standards do these assembled bolt sets meet?

A:

The Assembled Bolt Set Grade 8.8 Bright Zinc Plated CE is typically produced in line with:

• EN ISO 898‑1 – Mechanical properties of carbon steel bolts, screws and studs (Grade 8.8).
• EN 15048 – Non‑preloaded structural bolting assemblies (where marked as such on the packaging).
• Relevant CE marking requirements under the Construction Products Regulation (CPR).

Please refer to the product label, datasheet or Declaration of Performance (DoP) for the exact standards and approvals applicable to your specific batch.

Q5. How do I choose the right size Grade 8.8 bolt for my project?

A:

Consider the following:

1. Bolt diameter (e.g. M8, M10, M12):
   • Determined by load, substrate material (e.g. C24 timber, structural steel) and design standards.
2. Bolt length:
   • Must pass through all connected materials, allow for washers, and leave enough thread protruding beyond the nut (usually at least one full thread).
3. Application type:
   • Structural steelwork, C24 timber beams, machinery bases, etc.
4. Engineer’s design / building regulations:
   • For structural work, always follow calculations and drawings supplied by a competent structural engineer.

If in doubt, consult a qualified professional or refer to Eurocode design guidance (EN 1993 / EN 1995).

Q6. What is the difference between a Grade 8.8 bolt and stainless steel bolt?

A:

• Grade 8.8 bolt:
  • Carbon steel, very high tensile strength.
  • Excellent for structural and mechanical loads.
  • Requires coating (e.g. BZP) for corrosion resistance.
• Typical stainless steel bolt (e.g. A2‑70):
  • Excellent corrosion resistance, especially in damp or mildly aggressive environments.
  • Generally lower tensile strength than Grade 8.8 (depending on type).
  • Ideal where corrosion resistance and appearance matter more than maximum strength.

For maximum strength in standard conditions, Grade 8.8 is often preferred; for maximum corrosion resistance, stainless may be the better choice.

Q7. Can I use impact drivers or power tools with these bolts?

A:

Yes, these hex head bolts can be tightened with power tools, including impact wrenches, provided that:

• You use the correct size impact socket.
• You do not over‑tighten – final tightening should follow torque recommendations for Grade 8.8 bolts.
• For structural or safety‑critical joints, confirm torque with a calibrated torque wrench after initial tightening with power tools.

Q8. Common Uses / How to Use the Assembled Bolt Set Grade 8.8 Bright Zinc Plated CE

Common Uses:

• Fixing steel brackets, end plates and cleats to beams, posts and columns
• C24 timber to steel connections in floors, roofs and frames
• Aligning and bolting together fabricated steelwork
• Securing machinery, conveyor supports, guards and plant
• Heavy‑duty DIY projects, frames, gates, and structural supports

How to Use (Step‑By‑Step):

1. Mark & drill holes in all components in line with design drawings.
2. Insert bolt through aligned holes; ensure orientation (head vs nut side) follows the design.
3. Fit washer(s) under the nut/head as required (especially in timber).
4. Hand‑tighten the nut until snug.
5. Use a spanner or torque wrench to tighten to the specified torque.
6. Inspect connections for correct seating and visible thread past the nut.