Model: 640-2-11

Valve Seat

Special Features:

Cres mil-s-853 rockwell hardness c scale 38 min to 40 max

Properties:

Flange Diameter

Between 0.749 inches and 0.750 inches

Body Outside Diameter

Between 0.571 inches and 0.573 inches

Body Inside Diameter

Between 0.375 inches and 0.376 inches

Flange Seat To Disk End Height

Between 0.273 inches and 0.315 inches

Under Flange Height

Between 0.402 inches and 0.444 inches

Seal Accommodation Type

Grooved

Hardness Rating

43.0 rockwell c and 47.0 rockwell c

Seating Surface Shape

Angular

Material

Stainless steel

Material Specification

Qq-s-763 type 440c federal specification single material response or mil-s-853 class 6 military specification single material response

Surface Treatment

Passivate

Surface Treatment Specification

Mil-s-5002 military specification all treatment responses

Test Data Document

81349-mil-i-6868 specification (includes engineering type bulletins, brochures, etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "", etc.).

NSN

4810-00-511-1360

Part Number

640-2-11

Description

Seat,valve

CAGE

57817

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 640-2-11 NSN 4810-00-511-1360

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:

0.2000lbs

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:

095190

UFC:

49790

LTL:

70.0

LCL:

70.0

WCC:

713

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