Model: 255-03

Valve Seat

Special Features:

Lower seat

Properties:

Thread Class
3a single threaded portion
Thread Length
0.172 inches single threaded portion
Flange Diameter
1.750 inches
Body Inside Diameter
1.375 inches
Flange Seat To Disk End Height
0.188 inches
Under Flange Height
0.250 inches
Thready Qty Per Inch (tpi)
18 single threaded portion
Hardness Rating
Not rated
Thread Size
1.625 inches single threaded portion
Seating Surface Shape
Flat
Material
Stainless steel
Material Specification
Qq-s-763 federal specification single material response
Style Designator
Threaded flanged
Thread Series Designator
Un single threaded portion
NSN
4820-01-214-3808
Part Number
255-03
Description
Seat,valve
CAGE
55378

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 255-03 NSN 4820-01-214-3808

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:
A
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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