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Worldwide distributor of NSN parts and consumables located in the USA.

Valve Seat

Model / MPN: 8538 PIECE 20 | NSN: 4820-01-218-8028
ITAR Registered seal

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.

Product Details
NATO Stock Number
4820-01-218-8028
Sold in multiples of
1 EA
DEMIL
DEMIL/MLI
Thread Class
2a single threaded portion
Thread Length
1.000 inches single threaded portion
Overall Height
1.250 inches
Taper Length
0.031 inches
Taper Minor Diameter
0.750 inches
Taper Major Diameter
1.000 inches
Body Inside Diameter
1.047 inches
Seat Angle In Deg
0.750
Thready Qty Per Inch (tpi)
18 single threaded portion
Thread Size
1.125 inches single threaded portion
Seating Surface Shape
Angular
Criticality Code Justification
Zzzy
Material
Copper alloy
Material Specification
Qq-n-281 federal specification single material response
Style Designator
B5 plain threaded
Thread Series Designator
Unef single threaded portion
Reference Number Differentiating Characteristics
Material will be in accordance with ships parts control center activity hx quality control, manufacturing and testing specifications

Pricing and Availability

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8538 PIECE 20 Cross Reference
  • A7410.001.127
  • 8538PC20 SPCLN
  • A7410.002.127