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4820-00-948-2968

Safety Relief Valve

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Official Item Classification

Name
Safety Relief Valve
(NSN) National Stock Number
4820-00-948-2968
(FSG) Federal Supply Group
48 Valves
(FSC) Federal Supply Classification
4820 Nonpowered Valves
(INC) Item Name Code
05488
(FIIG) Federal Item Identification Guide
A046B0
Date
04/06/1966 (60 years ago)

3b 1st end thread class, right-hand 1st end thread direction, 3a 2nd end thread class, poppet flow control device, right-hand 2nd end thread direction

Specs & Compatibility

Thread Class

3a 2nd end

Thread Class

3b 1st end

Thread Direction

right-hand 1st end

Thread Direction

right-hand 2nd end

Flow Control Device

poppet

Bonnet Type

inside spring

Bonnet Attachment Method

threaded

Disk Loading Method

spring

Valve Discharge Flow Rate

2499.0 pounds per hour

Connection Style

external seat for gasket seal (boss) 2nd end

Connection Style

gasket seal(boss) 1st end

Valve Operation Method

automatic

Connection Type

threaded external boss 2nd end

Connection Type

threaded internal boss 1st end

Features Provided

bonnet packing and pressure tight outlet side

Thread Quantity Per Inch

11-1/2 1st end

Thread Quantity Per Inch

11-1/2 2nd end

Adjustable Pressure Range

+5.0 to 250.0 pounds per square inch

Nominal Thread Size

1.000 inches 2nd end

Nominal Thread Size

1.000 inches 1st end

Material

copper alloy body

Material

copper alloy flow control device

Material

copper alloy seat

Material

steel stem

Style Designator

angle

Thread Series Designator

npt 2nd end

Thread Series Designator

npt 1st end

Regulatory Compliance

Precious Metals Indicator
U

Precious metal content is unknown

Criticality Code
X

The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

Hazardous Metals Indicator
N

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

Pseudo Item Name Code

0005488

Related Hardware Products

Part Number Description
2611-1IN25PSI Safety Relief Valve

Frequently Asked Questions

What is the FSCG of the NSN 4820-00-948-2968?
The FSCG of the NSN 4820-00-948-2968 is 4820
Does the NSN 4820-00-948-2968 have a Schedule B code assigned?
Yes, the Schedule B code is 8481400000
Does NSN 4820-00-948-2968 require demilitarization?
Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.
Does NSN 4820-00-948-2968 contain precious materials?
Precious metal content is unknown
Does NSN 4820-00-948-2968 contain hazardous materials?
Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.
When the NSN 4820-00-948-2968 was assigned to the Federal Catalog?
It was assigned 60 years ago, on Wed, Apr 6, 1966