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HTW4 — INDICATOR,SIGHT,LIQUID

✓ Government record, cited
FRC ELECTRICAL INDUSTRIES INC · COMPONENT
PRODUCT OVERVIEW

HTW4: INDICATOR,SIGHT,LIQUID.

The INDICATOR,SIGHT,LIQUID is a FRC ELECTRICAL INDUSTRIES INC industrial component. Key specifications include MATERIAL: STEEL, OVERALL HEIGHT: 1.000 INCHES NOMINAL IN, SIGHT DIAMETER: 0.925 INCHES NOMINAL IN, WIDTH ACROSS FLATS: 1.437 INCHES NOMINAL IN, DATA FURNISHING METHOD: CLEAR WINDOW, MAXIMUM WORKING PRESSURE: 5000.0 POUNDS PER SQUARE INCH (PSI) LBS. This part is cataloged in the U.S.

Government catalog under NSN 6680-00-044-0660, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
HTW4
NSN: 6680-00-044-0660
FSC: 6680 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments
CAGE: 20093 — FRC ELECTRICAL INDUSTRIES INC (USA)
SPECIFICATIONS
MATERIALSTEEL
OVERALL HEIGHT1.000 INCHES NOMINAL IN
SIGHT DIAMETER0.925 INCHES NOMINAL IN
WIDTH ACROSS FLATS1.437 INCHES NOMINAL IN
DATA FURNISHING METHODCLEAR WINDOW
MAXIMUM WORKING PRESSURE5000.0 POUNDS PER SQUARE INCH (PSI) LBS
NOMINAL PIPE SIZE FOR WHICH DESIGNEDUNABLE TO DECODE
NSN6680-00-044-0660
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR MFR: FRC ELECTRICAL INDUSTRIES INC INDICATOR,SIGHT,LIQUID TITLE COMPONENT PN HTW4 MFR FRC ELECTRICAL INDUSTRIES INC INDICATOR,SIGHT,LIQUID
KEY FEATURES
•
WIDTH ACROSS FLATS: 1.437 INCHES NOMINAL IN
•
NOMINAL PIPE SIZE FOR WHICH DESIGNED: UNABLE TO DECODE
•
DATA FURNISHING METHOD: CLEAR WINDOW
•
MAXIMUM WORKING PRESSURE: 5000.0 POUNDS PER SQUARE INCH (PSI) LBS
•
MATERIAL: STEEL
•
SIGHT DIAMETER: 0.925 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT1.000 INCHES NOMINAL IN
WIDTH ACROSS FLATS1.437 INCHES NOMINAL IN
NOMINAL PIPE SIZE FOR WHICH DESIGNEDUNABLE TO DECODE
DATA FURNISHING METHODCLEAR WINDOW
MAXIMUM WORKING PRESSURE5000.0 POUNDS PER SQUARE INCH (PSI) LBS
MATERIALSTEEL
SIGHT DIAMETER0.925 INCHES NOMINAL IN
OTHER ITEMS IN FSC 6680 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
6680-00-000-0189 6680-00-001-1478 6680-00-001-1502 6680-00-001-1506 6680-00-001-1511 6680-00-001-3672 6680-00-001-3675 6680-00-001-4170
SUBSTITUTES & CROSS-REFERENCES 2
PK-18797Reference document
Same NSN cross-reference
Reference document — Secondary reference
524261Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is HTW4?
HTW4 is a INDICATOR,SIGHT,LIQUID manufactured by FRC ELECTRICAL INDUSTRIES INC.
What parts can replace HTW4?
There are 2 known substitutes for HTW4: PK-18797, 524261. Substitute compatibility should be verified for your specific system.
What is the NSN for HTW4?
HTW4 is cataloged in the U.S. Government catalog under NSN 6680-00-044-0660. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.