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[China]
Trade Verify
Address: 117-119, building 28, Nanfang stainless steel trading center, Xinwu District, Wuxi
Contact name:david
EUROTECH FASTENERS (WUXI) CO., LTD |
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Verified Suppliers
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1/4" 1/2" 3/4" 3/8" 5/8" 5/16" Metal Black Oxide Flat Washers M2
M2.5 M3 M3.5 M4 M5 DIN 9021
Description
Typical size
#10 black flat washer
1/4 black flat washers
3/8 black flat washer
5/16 black flat washers
Washers often get thrown to the side or made into a game, but these
unimpressive metal circles are more important than they are given
credit for. They keep other fasteners in place against vibrations
and impact. They keep surfaces from slipping against one another.
we have a selection of Black Oxide Stainless Steel Washers to blend
with dark-colored projects. Our washers are all weather resistant
and high quality.
The washer size to be used with a particular screw size is
determined by the first number in the screw size.
For example, a 4-40 machine screw and a #4 sheet metal have about
the same major thread diameter and require a #4 washer, flat or
lock.
A washer is normally used to distribute the load of a threaded
fastener, such as a screw or nut. Other uses are as a spacer, a
wear pad, preload indicating device, locking device, and to reduce
vibration.
Washers are also important for preventing galvanic corrosion,
particularly by insulating steel screws from aluminium surfaces.
To complement our range of fixtures and fittings, we have sourced a
range of industrial black oxide washers. These come in a variety of
sizes to suit various application such as furniture construction,
woodworking projects, lighting design and any general vintage
industrial project.
These flat washers will create a more authentic appearance for your
project.
Thick Washer, Flat Washer Type Standard, Material Steel, Material
Grade/Class Grade 5, Finish Black Oxide, For Screw Size #10, Inside
Diameter 0.203 in, Outside Diameter 1/2 in, Maximum Thickness 0.093
in, System of Measurement Inch, Minimum Thickness 0.093 in, Color
Black, Inside Diameter Tolerance +/-0.010 in, Outside Diameter
Tolerance +/-0.010 in, Pack Size Small Pack, Rockwell Hardness C4,
Thickness Tolerance +0.005/-0.004 in, Package Quantity 25
Material | Stainless steel (304, 316, 201), carbon steel (35#, 45#),
galvanized, aluminum alloy, copper, carbon steel and so on | |||
Standard | GB,DIN,BS,ISO,JIS,ANSI,UNC,Nonstandard or your demand | |||
Size | M2-M48 or as request | |||
Length | According to customer requirements | |||
Color | black,color zinc,etc | |||
Finish | Plain,Zinc Plated(Clear/Blue/Yellow/Black), Black oxide,Nickel,grey
phosphate,nickel,ruspert,H.D.G,etc | |||
Grade | 4.8,8.8,12.8,A2,A4,T4,T6 etc | |||
Heat Treatment | Tempering,Hardening,Spheroidizing,Stress Relieving | |||
Specification | Various head style and sizes per your request | |||
Notice | Please lets know the Size, quantity, Material or Grade, surface
finish, If it is special and Non-standard products, please supply the Drawing or Photos or Samples to us. | |||
Quality Certificate | ISO 9001:2000 and ISO 16949,CE | |||
Inspection quality system | ISO standard, 100% Whole inspection through the production | |||
Equipment | Hardness test, torque test, salt spray endurance test, mechanical
sizes test,certification and etc as per your need. | |||
Inspection process | Incoming quality control →Process Quality Control →Final Quality
Control → Pre-shipment Quality Control | |||
Black or Plain Finish Flat Washers
Flat washers are unfinished or will have a minimally protective finish. Black flat washers offer near zero corrosion resistance, though black oxide coatings or oiled coatings do offer increased corrosion resistance over unfinished flat washers.
Black flat washers are commonly referred to as plain finish, black, black oxide, black phosphate, bare or light oil coated.
Galvanized Flat Washers
Flat washers are coated with a sacrificial zinc coating that acts as an anode to prevent the fastener underneath from corroding.
Hot Dipped Galvanized: Fasteners are dipped in a bath of molten zinc.
Plated Flat Washers
Flat washers are coated with a thin layer of zinc, typically via electroplating.
Plated SAE flat washers will not corrode as quickly when covered with this protective coating, even when a scratch or cut exposes the steel to air or moisture. Zinc or cadmium plating acts as a sacrificial anode, and will always tarnish and corrode first thereby protecting the steel underneath.
Teflon or PTFE Coated Flat Washers
Flat washers have a PTFE coating (commonly referred to as the Dupont tradename Teflon Flat Washers) and are formulated with superior characteristics for maximum fastener life.
Technical components include a tensile strength of up to 4,000 psi and an operating pressure up to 100,000 psi. The absence of thread locking oxides enable easy and safe fastener removal. PTFE coatings have extreme chemical resistance and are ideal for applications including insulating piping, boiler rooms, water filled piping, water lines and more.
