PartsTable
Technical Data Sheet
Download PDF

12-878 — SWITCH,THERMOSTAT

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

12-878: SWITCH,THERMOSTAT.

The SWITCH,THERMOSTAT is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, thread_length: 0.312 INCHES IN, wire_diameter: 0.00260 INCHES MINIMUM AND 0.00450 INCHES MAXIMUM IN, overall_height: 0.375 INCHES IN, connection_type: THREADED EXTERNAL PIPE FIRST END, terminal_length: 0.300 INCHES IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-020-6550, 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
MRO→ MRO_GENERAL→ 12-878
NSN: 4730-00-020-6550
NIINs: 000206550, 000377762, 004806492, 004959680, 005133307, 010449130, 011594995, 016284669
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 71895 — COLLINS ENGINE NOZZLES, INC (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
thread_length0.312 INCHES IN
wire_diameter0.00260 INCHES MINIMUM AND 0.00450 INCHES MAXIMUM IN
overall_height0.375 INCHES IN
connection_typeTHREADED EXTERNAL PIPE FIRST END
terminal_length0.300 INCHES IN
connection_stylePLAIN (PIPE) FIRST END
style_designatorSTRAIGHT THRU
thread_directionRIGHT-HAND FIRST END
basic_shape_styleNONTUBULAR, HEX
surface_treatmentNICKEL OVERALL SINGLE LAYER
thru-hole_diameter0.040 INCHES IN
NSN4730-00-020-6550
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 12-878 · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
FILTERING MEDIA DESIGN: MESH
•
SURFACE TREATMENT: PASSIVATE
•
MATERIAL: STEEL CORROSION RESISTING
•
WIRE DIAMETER: 0.00260 INCHES MINIMUM AND 0.00450 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
FILTERING MEDIA DESIGNMESH
SURFACE TREATMENTPASSIVATE
END ITEM IDENTIFICATIONFUEL CONTROL,ENGINE,ACFT
MATERIALSTEEL CORROSION RESISTING
WIRE DIAMETER0.00260 INCHES MINIMUM AND 0.00450 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
Ready to buy 12-878?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 12-878?
12-878 is a SWITCH,THERMOSTAT. It is classified as a MRO (MRO_GENERAL).
What is the NSN for 12-878?
12-878 is cataloged in the U.S. Government catalog under NSN 4730-00-020-6550. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 12-878

✓ 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.