PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1727Seat,valve

Droitcour Co · NSN 4820-01-408-7019 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-408-7019 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-408-7019. Primary manufacturer part number: 1727.
Features
  • Seat,valve — FSC 4820
  • Style Designator: PLAIN
  • Material: STEEL COMP 416 SEAT
  • Body Inside Diameter: 0.540 INCHES NOMINAL IN
  • Body Outside Diameter: 0.560 INCHES NOMINAL IN
  • 3 verified cross-references
  • Primary manufacturer: Droitcour Co
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Comp 416 Seat construction
General Description

The Seat,valve, cataloged under National Stock Number 4820-01-408-7019, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Droitcour Co. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-408-7019
Primary Part Number1727
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerDroitcour Co
StatusACTIVE
Style DesignatorPLAIN
MaterialSTEEL COMP 416 SEAT
Body Inside Diameter0.540 INCHES NOMINAL IN
Body Outside Diameter0.560 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5330-00-086-7298 INTERCHANGEABLE
Seal,plain Encased
5945-00-088-252421-006 INTERCHANGEABLE
Relay,electromagnetic
Te Connectivity Corporation
5120-00-187-7126 INTERCHANGEABLE
Wrench,open End
6145-00-192-164321-006 INTERCHANGEABLE
Resistance Wire
Raytheon Company Div Corp
5310-00-193-7577105090-503 INTERCHANGEABLE
Washer,lock
Raytheon Company
5999-00-240-4323A1727 INTERCHANGEABLE
Contact,electrical
Grimes Aerospace Company
5950-00-251-655321006 INTERCHANGEABLE
Transformer,pulse
Magnetika Inc
5310-00-339-8929NK818-6D INTERCHANGEABLE
Nut
Long-Lok, Llc
6625-00-345-80981727 INTERCHANGEABLE
Meter,null
General Microwave Corporation Div Kratos Microwave Electronics
5330-00-367-5938119757 INTERCHANGEABLE
Gasket
Mag Aerospace Industries, Llc Div Safran Cabins
Cross-Reference Index
Part NumberManufacturer
1727 PRIMARY Droitcour Co (USA)
2100-6 Droitcour Co (USA)
2252-19 Droitcour Co (USA)
Related Parts
5330-00-086-7298INTERCHANGEABLE
SEAL,PLAIN ENCASED
5945-00-088-2524INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
21-006
5120-00-187-7126INTERCHANGEABLE
WRENCH,OPEN END
6145-00-192-1643INTERCHANGEABLE
RESISTANCE WIRE
21-006
5310-00-193-7577INTERCHANGEABLE
WASHER,LOCK
105090-503
5999-00-240-4323INTERCHANGEABLE
CONTACT,ELECTRICAL
A1727
5950-00-251-6553INTERCHANGEABLE
TRANSFORMER,PULSE
21006
5310-00-339-8929INTERCHANGEABLE
NUT
NK818-6D
6625-00-345-8098INTERCHANGEABLE
METER,NULL
1727
5330-00-367-5938INTERCHANGEABLE
GASKET
119757
4730-00-510-1306INTERCHANGEABLE
ADAPTER,STRAIGHT,PIPE TO TUBE
930904
5977-00-927-0216INTERCHANGEABLE
RING ASSEMBLY,ELECTRICAL CONTACT

Frequently Asked Questions

What is NSN 4820-01-408-7019?

NSN 4820-01-408-7019 is a Seat,valve, manufactured by Droitcour Co, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-408-7019?

NSN 4820-01-408-7019 has 3 cross-referenced part numbers: 1727 (Droitcour Co), 2100-6 (Droitcour Co), 2252-19 (Droitcour Co).

What NSN replaces 4820-01-408-7019?

There are 12 known substitutes for 4820-01-408-7019: 5330-00-086-7298, 5945-00-088-2524, 5120-00-187-7126 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1727?

Key specifications for 1727: Special Features: UPPER LOCATOR; Style Designator: PLAIN; Material: STEEL COMP 416 SEAT; Body Inside Diameter: 0.540 INCHES NOMINAL IN. 7 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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