NSN 6645-00-445-7777 · NIIN 004457777 · Part number 7690
The Chelsea Clock Llc · FSC 6645 — Time Measuring Instruments · FSG 66 — Instruments and Laboratory Equipment · CAGE 11755
Government record, cited
NSN 6645-00-445-7777 — this item is cataloged by the U.S. Government under National Stock Number 6645-00-445-7777. Manufacturer of record part number: 7690.
Also searched as6645-00-445-7777 ·
6645004457777 ·
NIIN 004457777 ·
00-445-7777 ·
FSC 6645 Time Measuring Instruments · CAGE 11755 · 7690
General Characteristics Item Description: BRASS; 0.750 NOM DIA
1 manufacturer part number on file
Manufacturer of record: The Chelsea Clock Llc
Identification
NSN: 6645-00-445-7777
NIIN: 004457777
FSC: 6645 — Time Measuring Instruments
FSG: 66 — Instruments and Laboratory Equipment
Primary part number: 7690
Manufacturer: The Chelsea Clock Llc
General Description
The Wheel,regulator, cataloged under National Stock Number 6645-00-445-7777, is classified within Federal Supply Class 6645 (Time Measuring Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is The Chelsea Clock Llc. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 7 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
6645-00-445-7777
Primary Part Number
7690
Item Name
Wheel,regulator
FSC / FSG
6645 / 66 — Time Measuring Instruments
Manufacturer
The Chelsea Clock Llc
Status
ACTIVE
General Characteristics Item Description
BRASS; 0.750 NOM DIA
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items7
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
6680-00-531-05167690-2POSSIBLE MATCH
GAGE,LIQUID QUANTITY,FLOAT TYPE
Possible match (shared part number)Rochester Sensors, Llc
6645-00-606-5703TE-230POSSIBLE MATCH
CLOCK,PANEL
Possible match (shared part number)Power Control Devices Inc
5962-01-058-4868POSSIBLE MATCH
MICROCIRCUIT,DIGITAL
Possible match (shared part number)
4820-01-120-80617690POSSIBLE MATCH
PISTON,VALVE
Possible match (shared part number)Quincy Compressor Division of Coltec Industries Inc Dba Quincy Compressor Div Quincy Compressor
6130-01-184-7393POSSIBLE MATCH
POWER PACK
Possible match (shared part number)
5340-01-578-11397690POSSIBLE MATCH
BOOT,DUST AND MOISTURE SEAL
Possible match (shared part number)Plastic Dip Moldings Inc
NSN 6645-00-445-7777 is a Wheel,regulator, manufactured by The Chelsea Clock Llc, classified under FSC 6645, Time Measuring Instruments. Status: active.
What part numbers are listed for NSN 6645-00-445-7777?
NSN 6645-00-445-7777 has 1 manufacturer part number on file: 7690 (The Chelsea Clock Llc).
What NSN replaces 6645-00-445-7777?
7 possible matches (shared part number, not a government interchangeability claim): 6680-00-531-0516, 6645-00-606-5703, 5962-01-058-4868. Verify interchangeability with system specifications before substitution.
What are the specifications of 7690?
Key specifications for 7690: General Characteristics Item Description: BRASS; 0.750 NOM DIA. 1 specification is documented in the U.S. Government catalog.
Is NSN 6645-00-445-7777 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.