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4820-00-939-8143

Valve Seat

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Official Item Classification

Name
Valve Seat
(NSN) National Stock Number
4820-00-939-8143
(FSG) Federal Supply Group
48 Valves
(FSC) Federal Supply Classification
4820 Nonpowered Valves
(INC) Item Name Code
22113
(FIIG) Federal Item Identification Guide
A15500
Date
11/16/1965 (60 years ago)

0.250 inches nominal single threaded portion thread length, 0.733 inches nominal body inside diameter, 2a single threaded portion thread class, 45.000 nominal seat angle in deg, 0.350 inches nominal overall height

Specs & Compatibility

Thread Class

2a single threaded portion

Thread Length

0.250 inches nominal single threaded portion

Overall Height

0.350 inches nominal

Body Inside Diameter

0.733 inches nominal

Seat Angle In Deg

45.000 nominal

Thread Quantity Per Inch

20 single threaded portion

Nominal Thread Size

1.125 inches single threaded portion

Seating Surface Shape

angular

Special Features

internal octagon wrenching facility,0.656 in. flat to flat distance

Material

plastic polyamide (nylon) overall

Style Designator

plain threaded

Thread Series Designator

un single threaded portion

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

0022113

Related Hardware Products

Part Number Description
51156E Valve Seat

Frequently Asked Questions

What is the FSCG of the NSN 4820-00-939-8143?
The FSCG of the NSN 4820-00-939-8143 is 4820
Does the NSN 4820-00-939-8143 have a Schedule B code assigned?
Yes, the Schedule B code is 8481909090
Does NSN 4820-00-939-8143 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 4820-00-939-8143 contain precious materials?
Precious metal content is unknown
Does NSN 4820-00-939-8143 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 4820-00-939-8143 was assigned to the Federal Catalog?
It was assigned 60 years ago, on Tue, Nov 16, 1965