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High-Quality ISO 8752 65Mn Black Oxide Spring Pins
Product Overview
ISO 8752 65Mn Black Oxide Slotted Spring Pins (also known as roll pins or tension pins) are self-retaining, headless, hollow mechanical fasteners with a continuous slot down the center. Engineered from premium 65Mn high-carbon spring steel, these pins feature double-end chamfers for effortless insertion into drilled holes.
When driven into a hole slightly smaller than the pin's relaxed outer diameter, the pin contracts, applying continuous outward radial compression against the inner wall. This spring action provides superior friction resistance, preventing movement, shear displacement, and loosening caused by high vibration.
Technical Specifications
Name
ISO 8752 dowel pin
SPEC
Φ2
Material
A2/carbon steel
Head Type
round
Application
automobile
Dimension Table (mm)
d
Φ1
Φ1.5
Φ2
Φ2.5
Φ3
Φ3.5
Φ4
Φ4.5
d max
1.3
1.8
2.4
2.9
3.5
4
4.6
5.1
d min
1.2
1.7
2.3
2.8
3.3
3.8
4.4
3.002
d1 h8
0.8
1.1
1.5
1.8
2.1
2.3
2.8
3
a max
0.35
0.45
0.55
0.6
0.7
0.8
0.85
1
a min
0.15
0.25
0.35
0.4
0.5
0.6
0.65
0.8
h
0.2
0.3
0.4
0.5
0.6
0.75
0.8
1
Key Features & Advantages
High-Grade 65Mn Spring Steel: Offers superior yield strength, fatigue endurance, and dynamic tension compared to standard carbon steel pins.
Black Oxide Finish: Provides micro-layer corrosion protection, enhanced surface lubricity for smooth installation, and an industrial matte-black appearance.
Vibration-Proof Self-Locking: Eliminates the need for secondary reaming, threading, or locking devices, saving production cost and assembly time.
Double-End Chamfered Design: Ensures self-centering alignment for precise automated or manual installation.
Industrial Machinery: Power transmission shafts, gear connections, drive pulleys, and conveyor assemblies.
Agricultural Equipment: Heavy-duty tractor linkages, implements, and harvester mechanisms.
Tooling & Manufacturing: Stamping die positioning, jig holding, and motor shaft retention.
Frequently Asked Questions
Q1: Why select 65Mn spring steel instead of stainless steel?
A: 65Mn spring steel offers significantly higher tensile yield strength, elasticity, and shear resistance, making it superior for heavy loads and continuous shock vibration applications.
Q2: What are the primary benefits of the Black Oxide surface treatment?
A: Black oxide adds corrosion protection without altering dimensions, eliminating thread/hole distortion risks associated with thick coatings.
Q3: Can these slotted spring pins be reused?
A: Yes, due to the high elasticity of heat-treated 65Mn steel, these pins retain their outward tension force and can be re-installed multiple times.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Exporter,Trading Company
Year Established:
2012
Total Annual:
5000000-6000000
Employee Number:
45~53
Ecer Certification：
Verified Supplier
Ningbo Yongbiao Fastener Manufacturing Co., Ltd. is located in Ningbo, the second largest port city in China. The factory is 50 kilometers away from Ningbo Port and can reach the sea freight warehouse in one hour, with very fast logistics. The company was founded in 2012 and after years of hard work... Ningbo Yongbiao Fastener Manufacturing Co., Ltd. is located in Ningbo, the second largest port city in China. The factory is 50 kilometers away from Ningbo Port and can reach the sea freight warehouse in one hour, with very fast logistics. The company was founded in 2012 and after years of hard work...
