Model: A-1556

Valve Seat

Properties:

Thread Length

0.500 inches single threaded portion

Flange Diameter

2.375 inches

Body Outside Diameter

1.000 inches

Body Inside Diameter

0.188 inches

Flange Seat To Disk End Height

1.250 inches

Under Flange Height

0.500 inches

Seat Angle In Deg

45.000

Thread Size

0.875 inches single threaded portion

Seating Surface Shape

Angular

Material

Chromium-molybdenum body

Material

Cobalt-chromium alloy face

Style Designator

Plain flanged

Thread Series Designator

Npt single threaded portion

NSN

4820-00-678-6390

Part Number

A-1556

Description

Seat,valve

CAGE

0BR59

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 A-1556 NSN 4820-00-678-6390

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:

594

TCC:

SHC:

ACC:

Trailers/Vehicles

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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