PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4404Plate,adjusting,sea

Lockheed Martin Corp · NSN 1680-00-858-4521 · FSC 1680 · No Item Name Available
Verified by PartsTable
NSN 1680-00-858-4521 — this item is cataloged by the U.S. Government under National Stock Number 1680-00-858-4521. Primary manufacturer part number: 4404.
Features
  • Plate,adjusting,sea — FSC 1680
  • 4 verified cross-references
  • Primary manufacturer: Lockheed Martin Corp
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Plate,adjusting,sea, cataloged under National Stock Number 1680-00-858-4521, is classified within Federal Supply Class 1680 (No Item Name Available) of the Aircraft Components and Accessories group. The primary manufacturer of record is Lockheed Martin Corp. This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NamePlate,adjusting,sea
FSC / FSG1680 — No Item Name Available (FSG 16)
ManufacturersB/e Aerospace Inc Dba Interturbine (CAGE 92802); Lockheed Martin Corp (CAGE 98897); Crestview Aerospace Llc Div Crestview Aerospace (CAGE 23974)
Technical Specifications
ParameterValue
NSN1680-00-858-4521
Primary Part Number4404
Item NamePlate,adjusting,sea
FSC / FSG1680 / 16 — No Item Name Available
ManufacturerLockheed Martin Corp
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4820-00-024-6331 INTERCHANGEABLE
Disk,valve
4730-00-068-8608148-2000-4 INTERCHANGEABLE
Adapter,straight,tube to Hose
Hydrasearch Company, Llc
5315-00-402-8728 INTERCHANGEABLE
Pin,quick Release
5950-00-672-9329 INTERCHANGEABLE
Coil,radio Frequency
4820-00-919-3587 INTERCHANGEABLE
Poppet,valve
5945-00-919-7749700-2 INTERCHANGEABLE
Relay,electromagnetic
Te Connectivity Corporation
6240-00-931-66864416 INTERCHANGEABLE
Lamp,incandescent
Lamp Industry for Use with Industry Designations and Abbreviations for Lamps
4820-00-953-16574404 INTERCHANGEABLE
Valve,globe
Flowserve Inc
5805-01-009-4852412-01 INTERCHANGEABLE
Telegraph Repeater Subassembly
Charles Industries, Llc Div Telecom
5120-01-097-0078440-4 INTERCHANGEABLE
Bit,screwdriver
Apex Tool Group, Llc
Cross-Reference Index
Part NumberManufacturer
4404004 B/e Aerospace Inc Dba Interturbine (USA)
4404 PRIMARY Lockheed Martin Corp (USA)
4404 B/e Aerospace Inc Dba Interturbine (USA)
4404004 Crestview Aerospace Llc Div Crestview Aerospace (USA)
Related Parts
4820-00-024-6331INTERCHANGEABLE
DISK,VALVE
4730-00-068-8608INTERCHANGEABLE
ADAPTER,STRAIGHT,TUBE TO HOSE
148-2000-4
5315-00-402-8728INTERCHANGEABLE
PIN,QUICK RELEASE
5950-00-672-9329INTERCHANGEABLE
COIL,RADIO FREQUENCY
4820-00-919-3587INTERCHANGEABLE
POPPET,VALVE
5945-00-919-7749INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
700-2
6240-00-931-6686INTERCHANGEABLE
LAMP,INCANDESCENT
4416
4820-00-953-1657INTERCHANGEABLE
VALVE,GLOBE
4404
5805-01-009-4852INTERCHANGEABLE
TELEGRAPH REPEATER SUBASSEMBLY
412-01
5120-01-097-0078INTERCHANGEABLE
BIT,SCREWDRIVER
440-4
6105-01-263-2247INTERCHANGEABLE
MOTOR,ALTERNATING CURRENT
4404
2540-01-297-9116INTERCHANGEABLE
ARM,WINDSHIELD WIPER

Frequently Asked Questions

What is NSN 1680-00-858-4521?

NSN 1680-00-858-4521 is a Plate,adjusting,sea, manufactured by Lockheed Martin Corp, classified under FSC 1680 (No Item Name Available). Status: active.

What are the part numbers for NSN 1680-00-858-4521?

NSN 1680-00-858-4521 has 4 cross-referenced part numbers: 4404004 (B/e Aerospace Inc Dba Interturbine), 4404 (Lockheed Martin Corp), 4404 (B/e Aerospace Inc Dba Interturbine), 4404004 (Crestview Aerospace Llc Div Crestview Aerospace).

What NSN replaces 1680-00-858-4521?

There are 12 known substitutes for 1680-00-858-4521: 4820-00-024-6331, 4730-00-068-8608, 5315-00-402-8728 and 9 more. Verify interchangeability with system specifications before substitution.

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