Model: 1668

Valve Seat

Properties:

Thread Class

2a single threaded portion

Thread Length

0.250 inches single threaded portion

Flange Diameter

2.781 inches

Body Outside Diameter

2.438 inches

Body Inside Diameter

2.000 inches

Flange Seat To Disk End Height

0.375 inches

Under Flange Height

0.375 inches

Seat Angle In Deg

30.000

Thready Qty Per Inch (tpi)

11 single threaded portion

Hardness Rating

125.0 brinell standard body and 150.0 brinell standard body

Hardness Rating

125.0 brinell standard face and 150.0 brinell standard face

Thread Size

2.438 inches single threaded portion

Seating Surface Shape

Angular

Material

Nickel alloy

Style Designator

Plain flanged

Thread Series Designator

Uns single threaded portion

NSN

4820-00-824-5274

Part Number

1668

Description

Seat,valve

CAGE

55378

A replaceable item designed to provide a stationary seating surface for a mating, moveable item such as a valve disk or the like. The body may have a flange of various shapes. For diesel and gasoline reciprocating engines, see insert, engine valve seat.

Part 1668 NSN 4820-00-824-5274

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

22113

FIIG:

A15500

Concept No.:

App. Key:

Cond. Code:

Status:

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators

HMIC

PMIC

ESD/EMI

ENAC

MMAC

CRITL

HMIC:

PMIC:

ESD:

MMAC:

CRITL:

Packaging & Shipping

Est. Pack Size

Est. Pack Weight

Est. Item Weight

Est. Item Dim.

Pack Size:

Paclk Weight:

0.4000lbs

Item Weight:

Item Dim:

OPI

SPI No.

SPI Rev.

SPC Mkg.

LVL A

LVL B

OPI:

SPI No.:

SPI Rev.:

SPC Mkg:

LVL_A:

LVL_B:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

050855

UFC:

29290

LTL:

RATING VARIABLE

LCL:

WCC:

576

TCC:

SHC:

ACC:

Construction Materials

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Schedule B and Export

Schedule B: 8481909090
SITC: 74790
End Use: Industrial machines, other
NAICS: 332911
USDA: 1

Freight Class: Parts of taps, cocks, valves and similar appliances, nesoi