Model: 52-3-21

Valve Seat

Properties:

Thread Class
2a first threaded portion
Thread Class
2a second threaded portion
Flange Diameter
3.625 inches
Overall Height
1.188 inches
Flange Seat To Disk End Height
0.500 inches
Under Flange Height
5.000 inches
Thready Qty Per Inch (tpi)
14 second threaded portion
Thready Qty Per Inch (tpi)
24 first threaded portion
Thread Size
1.450 inches first threaded portion
Thread Size
2.375 inches second threaded portion
Seating Surface Shape
Flat
Body Stepped Inside Diameter
1.000 inches first step and 1.003 inches first step
Body Stepped Inside Diameter
1.750 inches second step
Body Stepped Inside Diameter
2.000 inches third step
Material
Steel comp 304
Style Designator
Double flanged
Thread Series Designator
Uns first threaded portion
Thread Series Designator
Uns second threaded portion
NSN
4820-00-587-7121
Part Number
52-3-21
Description
Seat,valve
CAGE
15187

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 52-3-21 NSN 4820-00-587-7121

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:
5.0000lbs
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:
594
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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