Safety Relief Valve
668413-1
(NSN) National Stock Number
4820-00-808-0526
Federal Supply Classification
4820 Nonpowered Valves
Item Name Code
05488
Schedule B Code
8481400000
Summary
3a 1st end thread class, right-hand 1st end thread direction, spring disk loading method, 4.0 gallons per minute valve discharge flow rate, flareless (tube) 1st end connection style, threaded external tube 1st end connection type
| DAC | HCC | DMIL | RNCC |
|---|---|---|---|
| 6 | - | - | 5 |
| RNVC | SADC | MSDS | RNAAC |
|---|---|---|---|
| 2 | - | - | TU |
Identification
A valve designed to automatically release excessive pressures. It is actuated by static pressure upstream of the valve and is used as a safety valve or relief valve, and may be set to close at a predetermined pressure. It is not designed for regulation of continuously fluctuating loads. It may be inline or cartridge (manifold) design. Excludes:valve (1), relief, pressure and temperature.
| INC | FIIG | Concept | Condition |
|---|---|---|---|
| 05488 | A046B0 | 1 | 2 |
Specifications
Thread Class
3a 1st end
Details
A numeric-alpha designator indicating the pitch diameter tolerance and an external or internal thread.Thread Direction
right-hand 1st end
Details
The direction of the thread when viewed axially. a right-hand thread winds in a clockwise direction while a left-hand thread winds in a counterclockwise direction.Disk Loading Method
spring
Details
The means of closing the item when inlet pressure decreases.Valve Discharge Flow Rate
4.0 gallons per minute
Details
The rated valve discharge capacity per unit of time.Connection Style
flareless (tube) 1st end
Details
The style designation indicating the configuration that most nearly corresponds to the appearance of the connection.Connection Type
threaded external tube 1st end
Details
Indicates the type of connection/s/.Features Provided
valve stem lock shield and pressure tight outlet side
Details
Those features,not otherwise specified,which may be required for proper functioning of the item.Thread Quantity Per Inch
18 1st end
Details
The number of threads on the item per linear inch measured on a line parallel to the thread axis.Adjustable Pressure Range
+66.0 to 70.0 pounds per square inch
Details
The minimum to maximum pressures at which the item may be set to open.Maximum Operating Pressure
75.0 pounds per square inch single response
Details
The maximum pressure at which the item is rated for operation.Nominal Thread Size
0.562 inches 1st end
Details
A designation that is used for the purpose of general identification of the thread.Seat Angle
12.0 degrees 1st end
Details
The angle of the end surface upon which the mated surface seats.Opening Pressure Setting
59.0 pounds per square inch
Details
The predetermined pressure at which the item is calibrated to open.Nominal Outside Diameter Tube Accommodated
0.375 inches 1st end
Details
The nominal length of a straight line which passes through the center of the accommodated tube,and terminates at the outside circumference.Material
aluminum alloy body
Details
The chemical compound or mechanical mixture properties of which the item is fabricated.Material
aluminum alloy seat
Details
The chemical compound or mechanical mixture properties of which the item is fabricated.Media For Which Designed
hydraulic fluid, phosphate-ester base single response
Details
The type of media for which the item is designed.Surface Treatment
anodize
Details
The metallic,nonmetallic,and/or chemical properties with which the item is plated,dipped,and/or coated.the treatment is designed to protect the surface(s) and cannot be wiped off.Surface Treatment Document And Classification
mil-a-8625,ty 1 mil spec single treatment response
Details
The specification,standard,or manufacturers reference,and the classification designation,such as type,class,grade,and the like,that identifies the surface treatment material.Style Designator
straight thru
Details
The style designation indicating the configuration that most nearly corresponds to the appearance of the item.Test Data Document
36659-668413 drawing (this is the basic governing drawing, such as a contractor drawing, original equipment manufacturer drawing, etc.; excludes any specification, standard or other document that may be referenced in a basic governing drawing)
Details
The specification,standard,drawing,or similar instrument that specifies environmental and performance requirements or test conditions under which an item is tested and establishes acceptable limits within which the item must conform identified by an alphabetic and/or numeric reference number. includes the commercial and government entity (cage) code of the entity controlling the instrument.Thread Series Designator
unf 1st end
Details
A designation distinguishing one group of thread diameter-pitch combinations from another by the number of threads per measurement scale for a specific diameter.Master-Cross Reference List
| Part | CAGE | DAC | HCC | RNCC | RNVC | MSDS | RNAAC |
|---|---|---|---|---|---|---|---|
| P30-220 | 91816 | 6 | - | 3 | 2 | - | SB |
| P36-220 | 91816 | 6 | - | 5 | 9 | - | SB |
| 668413-3 | 98897 | 6 | - | 5 | 2 | - | TU |
Material and Special Handling
Hazardous material, precious metals, criticality, and electrostatic discharge indicators.
| HMIC | PMIC | ESD/EMI | Criticality |
|---|---|---|---|
| N | A | - | - |
Freight
Universal / National Freight and Handling Information
| UFC | HMC | LTL | LCL |
|---|---|---|---|
| 64490 | - | P | P |
| RVC | WCC | TCC | SHC |
|---|---|---|---|
| - | 594 | Z | Z |
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Manufacturer
LOCKHEED MARTIN CORP DIV LOCKHEED MARTIN AERONAUTICS COMPANY
CAGE: 98897
MARIETTA
, GA
, 30063-0001
UNITED STATES
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FAQs
Frequently asked questions for NSN 4820-00-808-0526
What is the NIIN of the NSN 4820-00-808-0526?
The National Item Identification Number (NIIN) of the NSN 4820-00-808-0526 is 00-808-0526
When the NSN 4820-00-808-0526 was assigned to the Federal Catalog?
It was assigned 62 years ago, on Mon, Jan 1, 1962
Does the NSN 4820-00-808-0526 contain any precious metals?
Does not contain precious metal
Does the NSN 4820-00-808-0526 contain any hazardous material?
No data in HMIRS
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