Model: 181987

Valve Seat

Special Features:

One hole 0.028 to 0.035 through body wall centered 0.101 to @0.106 in. From flange end

Properties:

Flange Diameter

Between 0.382 inches and 0.383 inches

Body Outside Diameter

Between 0.286 inches and 0.288 inches

Body Inside Diameter

Between 0.174 inches and 0.176 inches

Flange Seat To Disk End Height

Between 0.078 inches and 0.082 inches

Under Flange Height

Between 0.070 inches and 0.076 inches

Seat Angle In Deg

20.000

Seating Surface Shape

Angular

Material

Stainless steel

Style Designator

Plain flanged

NSN

4820-00-803-6031

Part Number

181987

Description

Seat,valve

CAGE

99657

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 181987 NSN 4820-00-803-6031

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:

0.1000lbs

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:

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