Model: D21908

Valve Seat

Special Features:

4 lugs 0.240 w, 0.188 deep equally spaced on flange end

Properties:

Thread Class
2a single threaded portion
Thread Length
0.250 inches single threaded portion
Flange Diameter
1.375 inches
Body Inside Diameter
0.754 inches
Flange Seat To Disk End Height
0.406 inches
Under Flange Height
0.375 inches
Seat Angle In Deg
42.000
Thready Qty Per Inch (tpi)
14 single threaded portion
Thread Size
1.125 inches single threaded portion
Seating Surface Shape
Angular
Material
Steel body
Style Designator
Threaded flanged
Thread Series Designator
Uns single threaded portion
NSN
4820-00-036-0696
Part Number
D21908
Description
Seat,valve
CAGE
34889

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 D21908 NSN 4820-00-036-0696

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

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
051080
UFC:
29300
LTL:
RATING VARIABLE
LCL:
--
WCC:
594
TCC:
Z
SHC:
9
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

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