Model: ND523

Valve Seat

Properties:

Thread Class
2a single threaded portion
Thread Length
0.656 inches single threaded portion
Overall Height
0.656 inches
Body Inside Diameter
0.500 inches
Seal Accommodation Type
Recessed
Thready Qty Per Inch (tpi)
28 single threaded portion
Thread Size
0.750 inches single threaded portion
Seating Surface Shape
Flat
Material
Copper
Material Specification
Astm b62 alloy 836 assn standard single material response seat
Style Designator
B5 plain threaded
Style Designator
Plain threaded
Thread Series Designator
Un single threaded portion
NSN
4820-00-036-0021
Part Number
ND523
Description
Seat,valve
CAGE
14959

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 ND523 NSN 4820-00-036-0021

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:
050855
UFC:
29290
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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