PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

9-771-01-0014Seat,valve

Air Products & Chemicals, Inc · NSN 4820-00-733-5677 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-733-5677 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-733-5677. Primary manufacturer part number: 9-771-01-0014.
Features
  • Seat,valve — FSC 4820
  • Seating Surface Shape: FLAT
  • Under Flange Height: 0.219 INCHES NOMINAL IN
  • Body Inside Diameter: 0.560 INCHES NOMINAL IN
  • Flange Diameter: 1.806 INCHES NOMINAL IN
  • Body Outside Diameter: 1.306 INCHES NOMINAL IN
  • Material: STEEL OVERALL
  • Style Designator: PLAIN FLANGED
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Overall construction
General Description

The Seat,valve, cataloged under National Stock Number 4820-00-733-5677, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Air Products & Chemicals, Inc. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4820-00-733-5677
Primary Part Number9-771-01-0014
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerAir Products & Chemicals, Inc
StatusCANCELLED
Seating Surface ShapeFLAT
Under Flange Height0.219 INCHES NOMINAL IN
Body Inside Diameter0.560 INCHES NOMINAL IN
Flange Diameter1.806 INCHES NOMINAL IN
Body Outside Diameter1.306 INCHES NOMINAL IN
MaterialSTEEL OVERALL
Style DesignatorPLAIN FLANGED
Flange Seat to Disk End Height0.844 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 7
5306-00-151-0420 INTERCHANGEABLE
Bolt,machine
6605-00-218-6339118291 INTERCHANGEABLE
Housing,bearing
Lockheed Martin Corporation Div Rms - Mitchel Field
5330-00-351-418719932 INTERCHANGEABLE
Gasket
Federal-Mogul Corp Fel-Pro Gasket Div
5945-00-954-5603P26A1P6A16 INTERCHANGEABLE
Relay,electromagnetic
Dri Relays Inc. Dba Dri Relays Inc
5950-01-186-8250118291 INTERCHANGEABLE
Transformer,power
Hammond Mfg Co Ltd
2520-01-211-4565118291 INTERCHANGEABLE
Parts Kit,driving Axle Different
Dana Commercial Vehicle Products, Llc
4330-01-596-2125FTBE1A10Q INTERCHANGEABLE
Filter Element,fluid
Parker-Hannifin Corporation Dba Hydraulic Filter Division Div Hydraulic & Fuel Filter Division
Cross-Reference Index
Part NumberManufacturer
1-18291 Chicago Pneumatic Tool Co (USA)
1-18291 Chicago Pneumatic Tool Co (USA)
9-771-01-0014 PRIMARY Air Products & Chemicals, Inc (USA)
Related Parts
5306-00-151-0420INTERCHANGEABLE
BOLT,MACHINE
6605-00-218-6339INTERCHANGEABLE
HOUSING,BEARING
118291
5330-00-351-4187INTERCHANGEABLE
GASKET
19932
5945-00-954-5603INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
P26A1P6A16
5950-01-186-8250INTERCHANGEABLE
TRANSFORMER,POWER
118291
2520-01-211-4565INTERCHANGEABLE
PARTS KIT,DRIVING AXLE DIFFERENT
118291
4330-01-596-2125INTERCHANGEABLE
FILTER ELEMENT,FLUID
FTBE1A10Q

Frequently Asked Questions

What is NSN 4820-00-733-5677?

NSN 4820-00-733-5677 is a Seat,valve, manufactured by Air Products & Chemicals, Inc, classified under FSC 4820 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4820-00-733-5677?

NSN 4820-00-733-5677 has 3 cross-referenced part numbers: 1-18291 (Chicago Pneumatic Tool Co), 1-18291 (Chicago Pneumatic Tool Co), 9-771-01-0014 (Air Products & Chemicals, Inc).

What NSN replaces 4820-00-733-5677?

There are 7 known substitutes for 4820-00-733-5677: 5306-00-151-0420, 6605-00-218-6339, 5330-00-351-4187 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 9-771-01-0014?

Key specifications for 9-771-01-0014: Special Features: CHAMFER ON SHORT END 1/4 IN. W BY 45DEG IN; Seating Surface Shape: FLAT; Under Flange Height: 0.219 INCHES NOMINAL IN; Body Inside Diameter: 0.560 INCHES NOMINAL IN. 9 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4820-00-733-5677 still in active supply?

NSN 4820-00-733-5677 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com