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C7856-12S — COUPLING,TUBE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

C7856-12S: COUPLING,TUBE.

The COUPLING,TUBE is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, thread_class: 3A FIRST END BULKHEAD A, connection_type: THREADED EXTERNAL TUBE FIRST END BULKHEAD, connection_style: SWAGED W/ GROOVES (TUBE) ALL ENDS, special_features: BOTH ENDS POLYTETRAFLUOROETHYLENE COATED INTERNALLY 0.423 IN. FROM THE END IN, style_designator: SWAGED ENDS W/BULKHEAD.

This part is cataloged in the U.S. Government catalog under NSN 4730-01-052-0778, 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
C7856-12S
NSN: 4730-01-052-0778
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 81755 — LOCKHEED MARTIN CORPORATION DIV LOCKHEED MARTIN AERONAUTICS COMPANY (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
thread_class3A FIRST END BULKHEAD A
connection_typeTHREADED EXTERNAL TUBE FIRST END BULKHEAD
connection_styleSWAGED W/ GROOVES (TUBE) ALL ENDS
special_featuresBOTH ENDS POLYTETRAFLUOROETHYLENE COATED INTERNALLY 0.423 IN. FROM THE END IN
style_designatorSWAGED ENDS W/BULKHEAD
surface_treatmentPASSIVATE OVERALL
nominal_thread_size0.750 INCHES FIRST END BULKHEAD IN
nominal_overall_length5.383 INCHES IN
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF) FIRST END BULKHEAD
material_document_and_classificationAMS 5656 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
nominal_outside_diameter_tube_accommodated0.500 INCHES ALL ENDS IN
NSN4730-01-052-0778
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: C7856-12S · 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
SUBSTITUTES & CROSS-REFERENCES 1
D10153Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 C7856-12S?
C7856-12S is a COUPLING,TUBE.
What parts can replace C7856-12S?
There is 1 known substitute for C7856-12S: D10153. Substitute compatibility should be verified for your specific system.
What is the NSN for C7856-12S?
C7856-12S is cataloged in the U.S. Government catalog under NSN 4730-01-052-0778. 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.