Approved Vendor

High-Pressure-Rated Metal-Bonded Sealing Washer

Manufacturer part: 93786A504

Tested to hold up to high pressures, these washers create the strongest seal of all to lock in air and fluid and keep equipment running efficiently. They are often used on flanged connections to prevent leaks in pumps, hydraulic systems, compressors, and other pressurized lines. The flexible rubber or plastic layer compresses to fills gaps, while the metal backing stops the washer from squeezing through the hole. For Screw Heads—Fit under screw heads to stop leaks. These washers seal best on screws that aren't threaded all the way up to the head. Reuse them a handful of times, as long as the material isn't damaged.Oil-Resistant Zinc-Plated Steel and Buna-N—These washers won't swell or soften when they touch oil, grease, and fuel. However, they will degrade if exposed to synthetic lubricants. They are also are more susceptible to rusting than 18-8 and 316 stainless steel.

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Technical data

Specifications

Normalized product attributes for faster comparison and sourcing.

ID
3.7 mm
OD
7.0 mm
ECCN
EAR99
Color
Black
Finish
Zinc Plated
Maximum
240° F
Minimum
-10° F
Hardness
Rockwell B105
Material
Steel/Buna-N
For Gases
200 psi
Thickness
0.9 mm to 1.1 mm
For Fluids
5,500 psi
Application
Sealing
Environment
Dusty, Oily, Wet
Fabrication
Bonded
Performance
Oil Resistant, Pressure Rated, Reusable
Washer Type
Flat
For Use With
Screw Heads
Seal Hardness
Durometer 60A
For Screw Size
M4
Pressure Rating
High Pressure
RoHS Compliance
Not Compliant
DFARS Compliance
Specialty Metals COTS-Exempt
REACH Compliance
Not Compliant
USMCA Qualifying
No
Country of Origin
Vietnam
Schedule B Number
392690.4500
System of Measurement
Metric

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