Valve Seat

321653

321653
(NSN) National Stock Number
4820-00-115-4188
Federal Supply Classification
4820 Nonpowered Valves
Item Name Code
22113
Schedule B Code
8481909090
Summary

0.495 inches nominal overall height, 0.678 inches minimum and 0.683 inches maximum body outside diameter, 0.135 inches minimum and 0.140 inches maximum body inside diameter, flat seating surface shape, steel overall material, 193-02,stewart-warner corp mfr ref single material response overall material document and classification

DAC HCC DMIL RNCC
1 - - 3
RNVC SADC MSDS RNAAC
2 - - AX
Identification

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.

INC FIIG Concept Condition
22113 A15500 - 2
Specifications
Overall Height
0.495 inches nominal
Details The distance measured in a straight line from the bottom to the top of an item.
Body Outside Diameter
0.678 inches minimum and 0.683 inches maximum
Details The length of a straight line which passes through the center of the body,and terminates at the outside circumference.
Body Inside Diameter
0.135 inches minimum and 0.140 inches maximum
Details The length of a straight line which passes through the center of a body,and terminates at the inside circumference.
Seating Surface Shape
flat
Details The physical configuration of the surface of the seat.
Material
steel overall
Details The chemical compound or mechanical mixture properties of which the item is fabricated.
Material Document And Classification
193-02,stewart-warner corp mfr ref single material response overall
Details The specification, standard, or manufacturer's reference and the classification designation, such as class, condition, temper, and the like, that identifies the material.
Style Designator
plain
Details The style designation indicating the configuration that most nearly corresponds to the appearance of the item.
Material and Special Handling
Hazardous material, precious metals, criticality, and electrostatic discharge indicators.
HMIC PMIC ESD/EMI Criticality
N U - -
Freight
Universal / National Freight and Handling Information
UFC HMC LTL LCL
29300 - W -
RVC WCC TCC SHC
- 594 Z 9

Certified Supplier

Order with confidence. We are a valued certified supplier serving customers in the military and aerospace industries.

  • Genuine Manufacturers Parts
  • 100% Product Inspection
  • 7 Year Sales Record Retention
  • Fast On-Time Delivery
  • HAZMAT Certified
  • Global Shipping
Manufacturer
STEWART-WARNER CORPORATION
CAGE: 57733
STAMFORD , CT , 06902-6987
UNITED STATES
View Products
FAQs
Frequently asked questions for NSN 4820-00-115-4188
What is the NIIN of the NSN 4820-00-115-4188?
The National Item Identification Number (NIIN) of the NSN 4820-00-115-4188 is 00-115-4188
When the NSN 4820-00-115-4188 was assigned to the Federal Catalog?
It was assigned 56 years ago, on Fri, Sep 20, 1968
Does the NSN 4820-00-115-4188 contain any precious metals?
Type/content is unknown
Does the NSN 4820-00-115-4188 contain any hazardous material?
No data in HMIRS

Can't Find It

If you didn't find what you need, don't worry, we're here to help! Our team is ready to help you find exactly what you need. Click below to contact us.

Who we are?

We are a trusted provider of milspec and aerospace hardware, offering high-quality consumables and parts. With a commitment to excellence, we guarantee reliable and fast delivery through our network of logistics centers. Our mission is to support the aerospace industry with precision and efficiency.

Contact
3555 Agricultural Center Dr.
St. Augustine, FL, 32092
United States
© 2025 Aerospace Hardware Store, Inc. All rights reserved.
Made in USA