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4H3870 — THERMOMETER,INDICATING,CAPILLARY

✓ Government record, cited
CATERPILLAR INC DIV CATERPILLAR DEFENSE · COMPONENT
PRODUCT OVERVIEW

4H3870: THERMOMETER,INDICATING,CAPILLARY.

THERMOMETER,INDICATING,CAPILLARY. Key specifications include MATERIAL: STEEL BULB, BULB STYLE: PLAIN BULB W/BENDABLE EXTENSION, STYLE DESIGNATOR: BULB W/O SOCKET, ACTIVE PORTION DIAMETER: 0.421 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 6685-00-536-9688, 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
4H3870
NSN: 6685-00-536-9688
FSC: 6685 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
MATERIALSTEEL BULB
BULB STYLEPLAIN BULB W/BENDABLE EXTENSION
BULB QUANTITY1
STYLE DESIGNATORBULB W/O SOCKET
ACTIVE PORTION DIAMETER0.421 INCHES NOMINAL IN
NSN6685-00-536-9688
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR MFR: CATERPILLAR INC DIV CATERPILLAR DEFENSE THERMOMETER,INDICATING,CAPILLARY TITLE COMPONENT PN 4H3870 MFR CATERPILLAR INC DIV CATERPILLAR DEFENSE THERMOMETER,INDICATING
KEY FEATURES
•
ACTIVE PORTION DIAMETER: 0.421 INCHES NOMINAL IN
•
STYLE DESIGNATOR: BULB W/O SOCKET
•
BULB QUANTITY: 1
•
BULB STYLE: PLAIN BULB W/BENDABLE EXTENSION
•
MATERIAL: STEEL METER CASE
TECHNICAL CHARACTERISTICS
ACTIVE PORTION DIAMETER0.421 INCHES NOMINAL IN
STYLE DESIGNATORBULB W/O SOCKET
BULB QUANTITY1
BULB STYLEPLAIN BULB W/BENDABLE EXTENSION
MATERIALSTEEL METER CASE
MATERIALSTEEL BULB
OTHER ITEMS IN FSC 6685 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
6685-00-001-1475 6685-00-001-1503 6685-00-001-1643 6685-00-001-1711 6685-00-001-2099 6685-00-001-2100 6685-00-001-2101 6685-00-001-2102
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4H3870?
4H3870 is a THERMOMETER,INDICATING,CAPILLARY manufactured by CATERPILLAR INC DIV CATERPILLAR DEFENSE.
What is the NSN for 4H3870?
4H3870 is cataloged in the U.S. Government catalog under NSN 6685-00-536-9688. 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.