Can I contact factories directly on CNFX?

CNFX is an open directory. Each factory profile provides direct contact information.

Fastening Holes Component – Machinery and Equipment Manufacturing

Component Specifications

Definition

Fastening holes are engineered apertures in mounting frames that provide precise locations for securing components through mechanical fasteners. These holes are typically drilled, reamed, or tapped to exact specifications to ensure proper alignment, load distribution, and vibration resistance in industrial applications. They serve as critical connection points that maintain structural integrity while allowing for assembly, disassembly, and maintenance of machine components.

Working Principle

Fastening holes work by providing geometrically precise locations where mechanical fasteners (bolts, screws, rivets) can be inserted to create secure connections between the mounting frame and attached components. The holes distribute clamping forces evenly across the frame material, preventing stress concentration while maintaining alignment. Threaded holes create internal mating surfaces for screws, while through-holes allow bolts to pass through for nut fastening on the opposite side.

Materials

Typically matches the mounting frame material: carbon steel (A36, 1018, 1045), stainless steel (304, 316), aluminum alloys (6061, 7075), or engineered plastics. Hole surfaces may have additional treatments: zinc plating, anodizing, or passivation for corrosion resistance.

Technical Parameters

thread_class 6H for internal threads, 6g for external threads
surface_finish Ra 1.6μm to 3.2μm
countersink_angle 82°, 90°, or 100°
positional_tolerance ±0.05mm to ±0.2mm
minimum_edge_distance 1.5× hole diameter
hole_diameter_tolerance ±0.1mm to ±0.01mm

Standards

ISO 273, ISO 4759-1, DIN 76-1, DIN 931, ASME B18.2.1

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Fastening Holes.

Parent Products

This component is used in the following industrial products

Mounting Frame

Structural component designed to securely hold and position safety interlock and viewport assemblies within industrial equipment.

View Product Details

Actuator/Mount

A mechanical interface and positioning component that securely attaches and precisely aligns the actuator to the beam steering mirror assembly.

View Product Details

Engineering Analysis

Risks & Mitigation

Thread stripping from over-torquing
Hole elongation from cyclic loading
Corrosion in harsh environments
Misalignment causing stress concentration
Fatigue failure at hole edges

FMEA Triads

Trigger: Incorrect hole diameter or positional tolerance
Failure: Misalignment during assembly leading to improper fastener seating
Mitigation: Implement statistical process control (SPC) for drilling operations and use coordinate measuring machines (CMM) for verification

Trigger: Insufficient edge distance around holes
Failure: Material tearing or cracking under load
Mitigation: Follow design standards for minimum edge distance (typically 1.5× hole diameter) and conduct finite element analysis (FEA) for stress distribution

Trigger: Corrosive environment without proper surface treatment
Failure: Reduced fastener grip strength and potential seizure
Mitigation: Apply appropriate coatings (zinc plating, anodizing) and specify corrosion-resistant materials for harsh environments

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance

ISO 2768-mK for general tolerances, ISO 4759-1 for thread tolerances

Test Method

Coordinate measuring machine (CMM) verification, go/no-go gauge testing, torque testing per ISO 16047, salt spray testing per ASTM B117 for corrosion resistance

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation

4/5

Manufacturing capability

4/5

Inspection readiness

5/5

Supplier transparency

3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

Related Components

Machine Frame

The rigid structural foundation of a CNC wood router that provides stability, vibration damping, and precision alignment for cutting operations.

pH Sensor Assembly

Precision pH sensor assembly for automated monitoring and dosing systems in industrial applications

Load Cell Assembly

Precision load cell assembly for automated powder dispensing systems

Dust Collection Port

A dust collection port is a critical component in automated powder dispensing systems that captures airborne particulates at the source to maintain clean air quality and prevent cross-contamination.

Frequently Asked Questions

What are the most critical tolerances for fastening holes in mounting frames?

Positional tolerance (±0.05mm-0.2mm) and diameter tolerance (±0.01mm-0.1mm) are most critical as they ensure proper alignment and fastener fit, preventing misalignment, stress concentration, and assembly issues.

How do I select the right fastening hole type for my application?

Consider load requirements (shear vs. tensile), environmental conditions (corrosion resistance), assembly frequency (threaded vs. through-holes), and material compatibility. Through-holes with nuts are best for high-load applications, while threaded holes suit frequent disassembly needs.

What maintenance do fastening holes require?

Regular inspection for wear, corrosion, or thread damage; cleaning to remove debris; lubrication of threaded holes; and torque verification during reassembly to prevent loosening from vibration.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Fastening Holes