Model: 638212-2

Valve Seat

Properties:

Thread Class

3a single threaded portion

Seat Angle In Deg

45.000

Thready Qty Per Inch (tpi)

16 single threaded portion

Thread Size

1.375 inches single threaded portion

Seating Surface Shape

Angular

Material

Steel

Material Specification

Fed standard 66 federal standard 1st material response or aisi 416/sae 51416 assn standard 2nd material response

Surface Treatment

Passivate

Thread Series Designator

Un single threaded portion

NSN

4820-00-903-4337

Part Number

638212-2

Description

Seat,valve

CAGE

72957

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 638212-2 NSN 4820-00-903-4337

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:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

127220

UFC:

64490

LTL:

77.5

LCL:

WCC:

594

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