Model: S251-4

Valve Seat

Special Features:

Spoked center hub accomodates 0.440 in. Diameter disk guide

Properties:

Thread Class

2a single threaded portion

Thread Length

0.813 inches single threaded portion

Overall Height

1.175 inches

Body Inside Diameter

3.235 inches

Seat Angle In Deg

45.000

Thready Qty Per Inch (tpi)

12 single threaded portion

Thread Size

3.625 inches single threaded portion

Seating Surface Shape

Angular

Material

Steel

Material Specification

Mil-s-15083 class 8 military specification single material response

Style Designator

B5 plain threaded

Style Designator

Plain threaded

Thread Series Designator

Un single threaded portion

NSN

4820-00-036-1233

Part Number

S251-4

Description

Seat,valve

CAGE

93591

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 S251-4 NSN 4820-00-036-1233

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:

051080

UFC:

29300

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