Product Parameter Specifications
Parameter | Details |
Product Name | ISO4017 Bolt + ISO4032 Nut + ISO7089 Washer Complete Set |
Executive Standard | ISO4017:2022, ISO4032, ISO7089 Unified Metric ISO Standard |
Precision Grade | Grade A (Precision), Grade B (General) Full Matching |
Strength Grade | 4.8/8.8/10.9/12.9 Carbon Steel, A2-70/A4-70 Stainless Steel |
Size Range | M1.6-M64 Full Sizes, M6-M36 Mass Stock Available |
Structural Feature | Full thread bolt + standard hex nut + Grade A flat washer, complete stress dispersion structure |
Surface Finish | Black Oxide, Zinc Plated, Hot-dip Galvanized, Stainless Steel Polished |
Matching Advantage | Unified tolerance and thread, no jamming, uniform stress, high assembly consistency |
Application Scene | Sheet metal, cabinet, electrical equipment, general machinery, industrial assembly |
Quality Control | Full inspection of dimension, thread, hardness, tensile strength and fitting performance |
Package Method | Export carton + pallet, neutral non-logo packaging for foreign trade |
Supply Capacity | Mass spot stock, bulk engineering orders, customized size processing |
Set Composition Introduction
1. ISO4017 Fully Threaded Hex Head Bolt
The ISO4017 full-thread hex bolt features a full-shank threaded structure with no smooth unthreaded section, providing an ultra-long adjustable locking stroke. It is perfectly suitable for thin plate, sheet metal and cabinet assembly with flexible locking at any position. Equipped with dual Grade A/B precision, it meets both high-precision equipment assembly and mass general industrial assembly requirements, serving as the most versatile metric full-thread bolt standard.
2. ISO4032 Standard Hex Nut
The ISO4032 hex nut is a dedicated matching fastener for ISO4017 bolts, with completely consistent thread tolerance and mechanical strength. It features regular thread profile and strong biting force, effectively avoiding thread slipping, tooth breaking and nut cracking during pre-tightening. It ensures stable bearing capacity and reliable fastening performance of the entire set for long-term service.
3. ISO7089 Grade A Standard Flat Washer
The ISO7089 Grade A precision flat washer is specially designed for metric standard fastener matching. It effectively disperses bolt locking pressure, increases the stressed area, protects the workpiece surface from crushing, and compensates assembly gaps to improve flatness and fitting tightness. Its unified precision tolerance perfectly matches Grade A/B bolts and nuts, greatly enhancing overall assembly stability.
Core Product Advantages
Full ISO Standard Matching, Zero Assembly Mismatch
The entire set adopts a unified ISO metric standard system, with one-to-one calibrated bolt pitch, nut thread profile and washer dimensions. Compared with mixed non-standard accessories, it completely eliminates thread jamming, loose fitting and assembly deviation, achieving a 100% assembly qualification rate and improving overall assembly efficiency.
A/B Dual Precision Grades for Full-scene Coverage
Grade A precision sets are applicable to high-precision machinery, imported equipment replacement and high-standard engineering projects. Grade B economical sets are ideal for mass production of sheet metal, cabinets and general machinery. The dual-grade design balances precision and cost, meeting diverse acceptance standards and budget requirements of global projects.
Scientific Stress Dispersion for Higher Stability
The three-piece assembly forms a scientific stress dispersion system. The flat washer evenly distributes pre-tightening pressure, avoids local stress concentration on workpieces, and prevents plate crushing, deformation and loose connection. It significantly improves the durability and long-term service stability of the fastening structure.
Multiple Materials & Finishes for Full-condition Adaptation
High-strength carbon steel series adapts to conventional mechanical heavy-duty fastening, while stainless steel series is suitable for humid and corrosive environments. Multiple surface treatments including black oxide, electro-galvanizing and hot-dip galvanizing fully cover indoor dry, outdoor open and coastal high-humidity working conditions to meet all anti-rust and anti-corrosion demands.
Matching Selection Guide
1. Precision Matching Rule: ISO4017-A precision bolts matched with ISO4032-A nuts and ISO7089-A washers for high-precision assembly; ISO4017-B general bolts matched with standard accessories for mass production to optimize cost performance.
2. Strength Matching Rule: 4.8-grade bolt with 5-grade nut, 8.8-grade bolt with 8-grade nut, 10.9-grade bolt with 10-grade nut, 12.9-grade bolt with 12-grade nut, ensuring unified mechanical performance of the whole set.
3. Working Condition Selection: Black oxide sets for indoor dry environments, zinc-plated sets for general anti-rust needs, hot-dip galvanized sets for outdoor and high-corrosion scenarios, and stainless steel sets for long-term corrosive environments.
Production Process
High-quality Raw Material Selection: Adopt qualified carbon steel, alloy steel and stainless steel with stable mechanical properties.
Precision Forming: Bolt cold heading, nut stamping and washer punching ensure compact and regular structure without deformation or burrs.
Precision Thread Rolling: Standard and full thread profile, 100% qualified by professional thread gauge inspection.
Professional Heat Treatment: High-strength products undergo quenching and tempering to balance hardness and toughness.
Unified Surface Treatment: Consistent anti-corrosion technology for the whole set to ensure uniform appearance and performance.
Complete Fitting Inspection: Dual manual and machine inspection to guarantee smooth assembly and qualified performance of every set.
Application Industries
Sheet Metal & Cabinet Industry: Fastening and assembly of electrical cabinets, equipment shells and sheet metal frames.
General Mechanical Equipment: Fixed connection of mechanical frames, cover plates and conventional structures.
Electrical & Automation Industry: Auxiliary fastening support for power distribution equipment and automated tooling.
Light Steel Structure Engineering: Connection of light-load supports and non-shear structural parts.
Global Industrial Supporting Projects: Standard fastener kits for overseas mechanical assembly and infrastructure construction.
Why Choose Our ISO Standard Fastener Set
We specialize in the production of ISO standard complete fastener sets. All ISO4017+ISO4032+ISO7089 assemblies are strictly manufactured in accordance with international standards with unified tolerance and stable performance. Complete grades and sizes with sufficient spot stock support sample customization, bulk export orders and non-standard processing. We can provide complete material certificates, mechanical test reports and quality inspection documents, helping global industrial customers reduce procurement costs and improve assembly efficiency.
Installation & Usage Notes
1. Standard Assembly: Place the flat washer in place and keep vertical locking. Avoid skew assembly to prevent uneven stress and fastening failure.
2. Standard Torque Construction: Tighten according to the standard torque corresponding to the bolt grade. Avoid over-tightening causing thread damage or under-tightening leading to insufficient fastening force.
3. Working Condition Adaptation: Black oxide sets are only suitable for indoor dry environments. Choose galvanized or stainless steel sets for humid, corrosive and outdoor working conditions.
4. Scene Limitation: This full-thread set is designed for tensile fastening of thin and medium plates. Select ISO4014 partial-thread bolt sets for thick plate shear-load-bearing nodes.
5. Non-reusable Structural Parts: Pre-stressed structural fastening sets will produce internal fatigue stress after use. Secondary reuse is prohibited for key engineering nodes to eliminate potential safety hazards.
For ISO standard complete fastener sets, single bolt/nut/washer bulk orders and customized fastening solutions, please contact us for accurate quotation and professional technical support.
