PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1623-00Diaphragm,valve,flat

Trac Regulator Co., Inc. Dba Trac Regulator Co Inc · NSN 4820-01-475-7887 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-475-7887 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-475-7887. Primary manufacturer part number: 1623-00.
Features
  • Diaphragm,valve,flat — FSC 4820
  • Media for Which Designed: OIL
  • Style Designator: FLAT
  • Material: RUBBER
  • 3 verified cross-references
  • Primary manufacturer: Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Rubber construction
General Description

The Diaphragm,valve,flat, cataloged under National Stock Number 4820-01-475-7887, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Trac Regulator Co., Inc. Dba Trac Regulator Co Inc. Government technical data includes 3 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
NSN4820-01-475-7887
Primary Part Number1623-00
Item NameDiaphragm,valve,flat
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerTrac Regulator Co., Inc. Dba Trac Regulator Co Inc
StatusACTIVE
Media for Which DesignedOIL
Style DesignatorFLAT
MaterialRUBBER
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4820-00-369-3402406955 INTERCHANGEABLE
Disk,valve
Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road)
2810-00-955-1018287170R2 INTERCHANGEABLE
Cylinder,engine,gasoline
Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney
5962-01-271-1780162300 INTERCHANGEABLE
Microcircuit,memory
Northrop Grumman Systems Corporation
4820-01-467-776840695-5 INTERCHANGEABLE
Valve,regulating,fluid Pressure
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
4820-01-474-67441631-00 INTERCHANGEABLE
Seat,valve
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
4820-01-475-78771655-00 INTERCHANGEABLE
Diaphragm,valve,flat
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
4820-01-475-78821619-00 INTERCHANGEABLE
Disk,valve
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
4820-01-475-79791638-00 INTERCHANGEABLE
Valve,angle
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
4820-01-475-81181620-00 INTERCHANGEABLE
Stem,fluid Valve
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
4820-01-475-81251656-00 INTERCHANGEABLE
Stem,fluid Valve
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
Cross-Reference Index
Part NumberManufacturer
1623-00 PRIMARY Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
40695-5 Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
40695-5 PC 9 Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
Related Parts
4820-00-369-3402INTERCHANGEABLE
DISK,VALVE
406955
2810-00-955-1018INTERCHANGEABLE
CYLINDER,ENGINE,GASOLINE
287170R2
5962-01-271-1780INTERCHANGEABLE
MICROCIRCUIT,MEMORY
162300
4820-01-467-7768INTERCHANGEABLE
VALVE,REGULATING,FLUID PRESSURE
40695-5
4820-01-474-6744INTERCHANGEABLE
SEAT,VALVE
1631-00
4820-01-475-7877INTERCHANGEABLE
DIAPHRAGM,VALVE,FLAT
1655-00
4820-01-475-7882INTERCHANGEABLE
DISK,VALVE
1619-00
4820-01-475-7979INTERCHANGEABLE
VALVE,ANGLE
1638-00
4820-01-475-8118INTERCHANGEABLE
STEM,FLUID VALVE
1620-00
4820-01-475-8125INTERCHANGEABLE
STEM,FLUID VALVE
1656-00
4820-01-475-8210INTERCHANGEABLE
VALVE,FLOW CONTROL
1640-00
4820-01-475-8233INTERCHANGEABLE
RETAINER,DISK,VALVE
1654-00

Frequently Asked Questions

What is NSN 4820-01-475-7887?

NSN 4820-01-475-7887 is a Diaphragm,valve,flat, manufactured by Trac Regulator Co., Inc. Dba Trac Regulator Co Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-475-7887?

NSN 4820-01-475-7887 has 3 cross-referenced part numbers: 1623-00 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 40695-5 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 40695-5 PC 9 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc).

What NSN replaces 4820-01-475-7887?

There are 12 known substitutes for 4820-01-475-7887: 4820-00-369-3402, 2810-00-955-1018, 5962-01-271-1780 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1623-00?

Key specifications for 1623-00: Media for Which Designed: OIL; Style Designator: FLAT; Special Features: MATERIAL IS BUNA-N ASTM-D2000; ITEM HAS NYLON INSERT; End Item Identification: NHA CAGE 55378 P/N 40695-501 2" TRAC STYLE 'FA' BACK PRESSURE REGULATING VALVE ASSEMBLY LUBE OIL SERVICE. 5 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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