INDUSTRY COMPONENT

Mounting Bolt

A mounting bolt is a threaded fastener used to securely attach components in mechanical systems, providing structural integrity and alignment.

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Component Specifications

Definition
A mounting bolt is a precision-engineered threaded fastener designed for securing machine components to structural frames or bases. In spring support systems, it specifically anchors spring assemblies, dampers, or vibration isolation units to machine foundations, ensuring proper load distribution and preventing displacement under dynamic forces. These bolts typically feature standardized thread patterns, head configurations for torque application, and corrosion-resistant finishes for industrial environments.
Working Principle
The mounting bolt functions through mechanical clamping force generated when tightened. As torque is applied, the bolt's threads engage with a nut or tapped hole, creating axial tension that compresses the joined components together. This tension converts into friction at the interfaces, preventing relative movement. In spring support systems, bolts must maintain clamping force despite cyclic loading from springs, requiring proper preload calculation and locking mechanisms.
Materials
Typically manufactured from medium-carbon steel (Grade 5 or 8.8), alloy steel (Grade 8 or 10.9), or stainless steel (A2/A4-70/80). High-strength applications may use chromium-molybdenum alloys. Surface treatments include zinc plating, hot-dip galvanizing, or dichromate coating for corrosion resistance.
Technical Parameters
  • Head Type Hexagon, flange, or socket
  • Thread Type Metric coarse (M) or fine (MF)
  • Length Range 20mm to 200mm
  • Diameter Range M6 to M24
  • Strength Grade 8.8, 10.9, or 12.9
  • Preload Requirement 70-90% of yield strength
  • Torque Specification 30-400 Nm depending on size/grade
Standards
ISO 4014, ISO 4017, DIN 931, DIN 933, ASME B18.2.1

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Mounting Bolt.

mounting bolt spring support bolt machine fastener industrial bolts vibration-resistant bolts torque specifications bolt materials ISO standards Mounting Bolt in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Spring Support System

A mechanical support system using springs to isolate and dampen vibrations in vibrating equipment.

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Engineering Analysis

Risks & Mitigation
  • Vibration-induced loosening
  • Fatigue failure from cyclic loading
  • Corrosion in humid environments
  • Over-torquing causing thread stripping
  • Under-torquing leading to joint separation
FMEA Triads
Trigger: Insufficient preload during installation
Failure: Bolt loosening under vibration, causing misalignment and component damage
Mitigation: Use calibrated torque wrenches, apply thread-locking compounds, implement regular torque audits
Trigger: Exposure to corrosive chemicals or moisture
Failure: Thread corrosion leading to seizure or strength reduction
Mitigation: Specify corrosion-resistant materials (stainless steel, coated alloys), implement protective covers, establish cleaning protocols

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: ±2mm for standard lengths
Test Method
Torque-tension testing per ISO 16047, salt spray testing per ASTM B117 for corrosion resistance, fatigue testing per ISO 3800 for cyclic loading performance

Buyer Feedback

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Frequently Asked Questions

What distinguishes mounting bolts from regular bolts in spring systems?

Mounting bolts for spring systems require higher fatigue resistance, precise preload control, and often feature vibration-resistant locking elements (like nylon inserts or prevailing torque nuts) to maintain clamping force under cyclic loading.

How often should mounting bolts be inspected in industrial applications?

Visual inspections should occur monthly, with torque verification every 6-12 months depending on vibration levels. Ultrasonic tension measurement is recommended for critical applications during annual maintenance.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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Mounting Body / Housing Mounting Bore