Model: 20689PC20

Valve Seat

Properties:

Thread Class
2a first threaded portion
Thread Class
2a second threaded portion
Overall Height
1.250 inches
Body Inside Diameter
3.500 inches
Seat Angle In Deg
43.000
Thready Qty Per Inch (tpi)
11-1/2 first threaded portion
Thready Qty Per Inch (tpi)
11-1/2 second threaded portion
Thread Size
4.012 inches first threaded portion
Thread Size
4.337 inches second threaded portion
Seating Surface Shape
Angular
Material
Stainless steel
Material Specification
Astm a351 gr.Cf-8m assn standard single material response seat
Style Designator
Double flanged
Thread Series Designator
Uns first threaded portion
Thread Series Designator
Uns second threaded portion
NSN
4820-00-630-5606
Part Number
20689PC20
Description
Seat,valve
CAGE

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 20689PC20 NSN 4820-00-630-5606

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
22113
FIIG:
A15500
Concept No.:
App. Key:
A
Cond. Code:
2
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
U
ESD:
ESD:
MMAC:
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
--
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
Q
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
051080
UFC:
29300
LTL:
RATING VARIABLE
LCL:
--
WCC:
576
TCC:
Z
SHC:
9
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

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