Maximum friction coefficient against bolt and workpiece.
Conical Design
Engineered disc spring shape.
Maintains preload tension even during structural “settling.”
Surface Hardening
Proprietary process achieving HV 350 – 550.
Guaranteed to “bite” into Grade 8.8 and 10.9 fasteners.
Corrosion Protection
Passivated or electropolished stainless steel.
Zero rust performance in marine and offshore environments.
Dimensions
Data Overview
Size (Metric)
Inner Dia (d1) [mm]
Outer Dia (d2) [mm]
Thickness (T) [mm]
Max. Height (h) [mm]
Weight [kg/1000pcs]
M4
4.3
7.0
0.50
0.80
0.08
M6
6.4
10.0
0.70
1.10
0.25
M8
8.4
13.0
0.80
1.30
0.50
M10
10.5
16.0
1.00
1.50
0.85
M12
13.0
18.0
1.10
1.65
1.20
M16
17.0
24.0
1.30
2.00
2.10
M20
21.0
30.0
1.50
2.30
3.50
M24
25.6
36.0
1.80
2.80
6.20
M30
31.0
45.0
2.00
3.20
11.00
Product Features & Engineering Logic
Material Grade
Relevant Standard
Corrosion Resistance
Best For
SUS304 (A2)
ISO 3506 / AISI 304
Standard Industrial
Outdoor construction, food equipment.
SUS316 (A4)
ISO 3506 / AISI 316
High (Chloride resistant)
Marine engineering, chemical processing.
254SMO
UNS S31254
Extreme (Acid/Pitting)
Offshore platforms, desalination plants.
Applications & Quality Assurance
Applications: Wind Power Generators, Railway Fastening, Automotive Suspension, Heavy Duty Rigging.
Quality Documentation: We provide MTC (Material Test Certificate) 3.1, Hardness Test Reports, and Dimension Inspection Reports for every batch.
FAQs
Q1: Why is surface hardening required for stainless steel safety washers?
Most stainless steel fasteners are relatively soft. To ensure the serrations can effectively “bite” into the bolt head and create a mechanical lock, the washer must have a higher hardness. Our process ensures a range of HV 350-550, making it suitable for high-tensile bolts.
Q2: Can I use S-series and M-series interchangeably?
S-series (Standard) is designed for regular bolts. M-series (Medium) has a larger outer diameter to reduce surface pressure, making it ideal for elongated holes or softer clamping surfaces.
Product Attributes
Property
Details
Industry
Industrial Fastener
Brand Name
XLUIG (Kunshan Xinluan New Material Technology Co., Ltd)
Place of Origin
Jiangsu, China
Certificate
ISO 9001:2015 Certified
Thread Size
Customized sizes available
MOQ
5,00 Pieces
OEM / ODM
Support (Based on technical drawings)
Samples
Available upon request
Supply Ability
Service Items
Details & Specifications
Packaging
Small boxes, plastic bags, bulk cartons, and wooden pallets
