PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21796-1Seat,valve

Coffin Turbo Pump Inc · NSN 4820-01-516-6111 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-516-6111 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-516-6111. Primary manufacturer part number: 21796-1.
Features
  • Seat,valve — FSC 4820
  • 3 verified cross-references
  • Primary manufacturer: Coffin Turbo Pump Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Seat,valve, cataloged under National Stock Number 4820-01-516-6111, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Coffin Turbo Pump Inc. This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Catalog Facts
Item NameSeat,valve
FSC / FSG4820 — No Item Name Available (FSG 48)
ManufacturersCoffin Turbo Pump Inc (CAGE 0APJ5)
Technical Specifications
ParameterValue
NSN4820-01-516-6111
Primary Part Number21796-1
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerCoffin Turbo Pump Inc
StatusCANCELLED
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 9
3110-00-100-6167 INTERCHANGEABLE
Ball,bearing
1560-00-128-739421796-1 INTERCHANGEABLE
Plate,armor,seat
Saint-Gobain Abrasives Inc
4820-01-400-207217086-1 INTERCHANGEABLE
Valve,ball
Coffin Turbo Pump Inc
4320-01-400-2075 INTERCHANGEABLE
Housing,liquid Pump
4820-01-416-684317088-2 INTERCHANGEABLE
Seat,valve
Coffin Turbo Pump Inc
4820-01-416-685017090-2 INTERCHANGEABLE
Seat,valve
Coffin Turbo Pump Inc
2825-01-419-792018384 INTERCHANGEABLE
Steam Chest,turbine
Coffin Turbo Pump Inc
2825-01-424-2230X277-18373-6 INTERCHANGEABLE
Steam Chest,turbine
Coffin Turbo Pump Inc
4820-01-516-610722009-1 INTERCHANGEABLE
Stem,fluid Valve
Coffin Turbo Pump Inc
Cross-Reference Index
Part NumberManufacturer
SKB-429 Coffin Turbo Pump Inc (USA)
SKB-429-1 ITEM NO.241 Coffin Turbo Pump Inc (USA)
21796-1 PRIMARY Coffin Turbo Pump Inc (USA)
Related Parts
3110-00-100-6167INTERCHANGEABLE
BALL,BEARING
1560-00-128-7394INTERCHANGEABLE
PLATE,ARMOR,SEAT
21796-1
4820-01-400-2072INTERCHANGEABLE
VALVE,BALL
17086-1
4320-01-400-2075INTERCHANGEABLE
HOUSING,LIQUID PUMP
4820-01-416-6843INTERCHANGEABLE
SEAT,VALVE
17088-2
4820-01-416-6850INTERCHANGEABLE
SEAT,VALVE
17090-2
2825-01-419-7920INTERCHANGEABLE
STEAM CHEST,TURBINE
18384
2825-01-424-2230INTERCHANGEABLE
STEAM CHEST,TURBINE
X277-18373-6
4820-01-516-6107INTERCHANGEABLE
STEM,FLUID VALVE
22009-1

Frequently Asked Questions

What is NSN 4820-01-516-6111?

NSN 4820-01-516-6111 is a Seat,valve, manufactured by Coffin Turbo Pump Inc, classified under FSC 4820 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4820-01-516-6111?

NSN 4820-01-516-6111 has 3 cross-referenced part numbers: SKB-429 (Coffin Turbo Pump Inc), SKB-429-1 ITEM NO.241 (Coffin Turbo Pump Inc), 21796-1 (Coffin Turbo Pump Inc).

What NSN replaces 4820-01-516-6111?

There are 9 known substitutes for 4820-01-516-6111: 3110-00-100-6167, 1560-00-128-7394, 4820-01-400-2072 and 6 more. Verify interchangeability with system specifications before substitution.

Is NSN 4820-01-516-6111 still in active supply?

NSN 4820-01-516-6111 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.
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