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C7851-12D — COUPLING,TUBE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

C7851-12D: COUPLING,TUBE.

The COUPLING,TUBE is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 6061 OVERALL, connection_type: UNTHREADED INTERNAL TUBE ALL ENDS, connection_style: SWAGED W/ GROOVES (TUBE) ALL ENDS, special_features: POLYTETRAFLUOROETHYLENE COATED,LIGHT GREEN ALL EXTERNAL SURFACES AND THE DISTANCE OF 0.365/0.390 IN. INTO BORE IN, style_designator: SWAGED BOTH ENDS, surface_treatment: ANODIZE OVERALL.

This part is cataloged in the U.S. Government catalog under NSN 4730-00-490-2994, 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
C7851-12D
NSN: 4730-00-490-2994
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 81755 — LOCKHEED MARTIN CORPORATION DIV LOCKHEED MARTIN AERONAUTICS COMPANY (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 6061 OVERALL
connection_typeUNTHREADED INTERNAL TUBE ALL ENDS
connection_styleSWAGED W/ GROOVES (TUBE) ALL ENDS
special_featuresPOLYTETRAFLUOROETHYLENE COATED,LIGHT GREEN ALL EXTERNAL SURFACES AND THE DISTANCE OF 0.365/0.390 IN. INTO BORE IN
style_designatorSWAGED BOTH ENDS
surface_treatmentANODIZE OVERALL
nominal_overall_length2.917 INCHES IN
end_item_identification43N AIRCRAFT, HORNET F/A-18
material_document_and_classificationQQ-A-225/8 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
nominal_outside_diameter_tube_accommodated0.750 INCHES ALL ENDS IN
NSN4730-00-490-2994
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: C7851-12D · 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
•
CONNECTION STYLE: SWAGED W/ GROOVES (TUBE) ALL ENDS
•
NOMINAL OVERALL LENGTH: 2.917 INCHES IN
•
CONNECTION TYPE: UNTHREADED INTERNAL TUBE ALL ENDS
•
STYLE DESIGNATOR: SWAGED BOTH ENDS
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/8 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.750 INCHES ALL ENDS IN
•
SURFACE TREATMENT: ANODIZE OVERALL
TECHNICAL CHARACTERISTICS
CONNECTION STYLESWAGED W/ GROOVES (TUBE) ALL ENDS
NOMINAL OVERALL LENGTH2.917 INCHES IN
CONNECTION TYPEUNTHREADED INTERNAL TUBE ALL ENDS
STYLE DESIGNATORSWAGED BOTH ENDS
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/8 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.750 INCHES ALL ENDS IN
SPECIAL FEATURESPOLYTETRAFLUOROETHYLENE COATED,LIGHT GREEN ALL EXTERNAL SURFACES AND THE DISTANCE OF 0.365/0.390 IN. INTO BORE IN
SURFACE TREATMENTANODIZE OVERALL
END ITEM IDENTIFICATION43N AIRCRAFT, HORNET F/A-18
MATERIALALUMINUM ALLOY 6061 OVERALL
SUBSTITUTES & CROSS-REFERENCES 9
H10036D12Reference document
Same NSN cross-reference
Reference document — Secondary reference
10108394Reference document
Same NSN cross-reference
Reference document — Informative reference only
ST7M190Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LD83020D12Reference document
Same NSN cross-reference
Reference document — Secondary reference
ST7M190D12Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
AC1050D12Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is C7851-12D?
C7851-12D is a COUPLING,TUBE.
What parts can replace C7851-12D?
There are 9 known substitutes for C7851-12D: H10036D12, 10108394, ST7M190 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for C7851-12D?
C7851-12D is cataloged in the U.S. Government catalog under NSN 4730-00-490-2994. 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.