Mounting Bolt: Length Range 20mm to 200mm

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

Parameter	Typical range	Notes & selection driver
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

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 4014, ISO 4017, DIN 931, DIN 933, ASME B18.2.1

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

Typical Suppliers & Equivalents

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

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Mounting Bolt

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

LinRail

Qingdao, Shandong, CN

Also makes: Laser Cutting System, Linear Guide Blocks, Linear guide / Rails and 9 more

Listed on the company's own website · profile compiled by CNFX from public sources

Listed there as: “Mounting Bolts”
View source page ↗ linrail.com · checked 2026-09-16

View profile Send enquiry

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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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.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

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.

Mounting Bolt