Model: 58-A-18-20

Valve Seat

Properties:

Thread Class
2a single threaded portion
Overall Height
Between 0.810 inches and 0.812 inches
Body Inside Diameter
6.875 inches
Seat Angle In Deg
45.000
Thready Qty Per Inch (tpi)
12 single threaded portion
Thread Size
7.625 inches single threaded portion
Seating Surface Shape
Angular
Material
Cobalt alloy face
Material
Steel body
Style Designator
B5 plain threaded
Style Designator
Plain threaded
Thread Series Designator
Uns single threaded portion
NSN
4820-00-369-9885
Part Number
58-A-18-20
Description
Seat,valve
CAGE
53553

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 58-A-18-20 NSN 4820-00-369-9885

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:
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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