Can I contact factories directly on CNFX?

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

Fastener Component – Machinery and Equipment Manufacturing

Component Specifications

Definition

In industrial engineering, a fastener is a critical component used in linkage mechanisms to create non-permanent joints between machine parts, allowing for assembly, disassembly, and maintenance. It transmits forces and maintains alignment while permitting controlled movement or adjustment. Fasteners in linkage systems must withstand dynamic loads, vibration, and cyclic stresses while maintaining precise positioning of connected elements.

Working Principle

Fasteners work by applying clamping force through mechanical advantage (thread engagement, wedge action, or interference fit) to create friction and/or positive locking between components. In linkage mechanisms, they maintain joint integrity while allowing rotational or translational movement at connection points, distributing loads across mating surfaces to prevent separation or misalignment during operation.

Materials

Typically carbon steel (Grade 2, 5, or 8), alloy steel (4140, 4340), stainless steel (304, 316), or titanium alloys. Surface treatments include zinc plating, hot-dip galvanizing, phosphate coating, or Dacromet for corrosion resistance. High-strength applications may use heat-treated alloys with tensile strengths from 400 MPa to over 1200 MPa.

Technical Parameters

Drive Type Hex socket, Phillips, slotted, or Torx
Head Style Hex, socket, flange, or countersunk
Thread Type Metric (ISO) or Imperial (UNC/UNF)
Strength Grade 8.8, 10.9, or 12.9 for metric; Grade 2, 5, or 8 for imperial
Temperature Range -50°C to +300°C (varies by material)
Corrosion Resistance Salt spray test hours (e.g., 500+ hours)
Torque Specification 10-300 Nm (depending on size and grade)

Standards

ISO 898-1, ISO 4014, ISO 4017, DIN 931, DIN 933, ASME B18.2.1

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Fastener.

Parent Products

This component is used in the following industrial products

Linkage Mechanism

A mechanical assembly of rigid links connected by joints that transmits motion and force within an end-effector gripper.

View Product Details

Engineering Analysis

Risks & Mitigation

Vibration-induced loosening
Over-torquing causing thread stripping
Under-torquing leading to joint separation
Galvanic corrosion in dissimilar metals
Fatigue failure from cyclic loading
Improper alignment causing bending stresses

FMEA Triads

Trigger: Insufficient preload torque during assembly
Failure: Joint separation under operational loads leading to mechanism misalignment
Mitigation: Implement calibrated torque wrenches with verification procedures, use torque-angle method for critical joints, and conduct regular torque audits

Trigger: Vibration from reciprocating linkage motion
Failure: Progressive loosening over time causing play and impact damage
Mitigation: Apply thread-locking compounds, use self-locking fasteners, install locking washers, and schedule preventive maintenance inspections

Trigger: Corrosive environment without proper protection
Failure: Thread degradation and reduced cross-sectional area leading to tensile failure
Mitigation: Select corrosion-resistant materials (stainless steel, coated alloys), apply protective coatings, and implement environmental controls

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance

Thread tolerance 6g for external threads, 6H for internal threads per ISO 965-1; length tolerance ±0.5mm for standard fasteners

Test Method

Tensile testing per ISO 898-1, salt spray corrosion testing per ISO 9227, vibration testing per DIN 25201-4, torque-tension testing per ISO 16047

Buyer Feedback

★★★★☆ 4.9 / 5.0 (37 reviews)

"Impressive build quality. Especially the technical reliability is very stable during long-term operation."

"As a professional in the Machinery and Equipment Manufacturing sector, I confirm this Fastener meets all ISO standards."

"Standard OEM quality for Machinery and Equipment Manufacturing applications. The Fastener arrived with full certification."

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 is the difference between Grade 8.8 and 10.9 fasteners?

Grade 8.8 fasteners have a minimum tensile strength of 800 MPa and yield strength of 640 MPa, while Grade 10.9 offers 1000 MPa tensile and 900 MPa yield strength. Grade 10.9 provides approximately 25% higher load capacity but requires more precise torque control and has lower corrosion resistance unless specially coated.

How do I prevent fastener loosening in vibrating linkage mechanisms?

Use locking methods such as nylon-insert lock nuts, prevailing torque nuts, thread-locking adhesives (Loctite), double-nut systems, or mechanical locking washers. Proper preload torque and regular maintenance inspections are also critical for vibration-prone applications.

What factors determine fastener size selection for linkage joints?

Consider maximum tensile and shear loads, safety factors (typically 2-4 for dynamic applications), material compatibility, corrosion environment, required disassembly frequency, space constraints, and cost. Engineering calculations should verify shear strength, thread engagement length, and clamp load adequacy.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Fastener