PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 2D56
2D56 ✓ Verified by PartsTable
— · HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

CONNECTOR,MULTIPLE,FLUID PRESSUR. Key specifications include material: STEEL OVERALL, bore_style: PLAIN BOTH ENDS, pressure_angle: 20.0000 DEGREES, style_designator: HUBLESS, thread_form_direction: LEFT-HAND, material_document_and_classification: QQ-S-633 FED SPEC SINGLE MATERIAL RESPONSE OVERALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-278-5812, 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
2D56
NSN: 4730-00-278-5812
FSC: 4730
CAGE: 56442 — DIAMOND REO TRUCK CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
bore_stylePLAIN BOTH ENDS
pressure_angle20.0000 DEGREES
style_designatorHUBLESS
thread_form_directionLEFT-HAND
material_document_and_classificationQQ-S-633 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN4730-00-278-5812
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 2D56 · 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
•
FLUID CONNECTION QUANTITY: 1 LOCATION NOT OTHERWISE SPECIFIED
•
THICKNESS: 0.563 INCHES NOMINAL IN
•
BOLT HOLE DIAMETER: 0.593 INCHES MINIMUM AND 0.598 INCHES MAXIMUM IN
•
THREAD PROVISION: THREADED LOCATION NOT OTHERWISE SPECIFIED
•
THREAD SIZE: 0.438-24 LOCATION NOT OTHERWISE SPECIFIED
•
SEAT ANGLE IN DEG: 42.0 LOCATION NOT OTHERWISE SPECIFIED
TECHNICAL CHARACTERISTICS (FLIS)
FLUID CONNECTION QUANTITY1 LOCATION NOT OTHERWISE SPECIFIED
THICKNESS0.563 INCHES NOMINAL IN
BOLT HOLE DIAMETER0.593 INCHES MINIMUM AND 0.598 INCHES MAXIMUM IN
THREAD PROVISIONTHREADED LOCATION NOT OTHERWISE SPECIFIED
OVERALL LENGTH1.094 INCHES NOMINAL IN
THREAD SIZE0.438-24 LOCATION NOT OTHERWISE SPECIFIED
SEAT ANGLE IN DEG42.0 LOCATION NOT OTHERWISE SPECIFIED
END ITEM IDENTIFICATIONGRUMMAN A10 AIRCRAFT
SCREW THREAD SERIES DESIGNATORUNS LOCATION NOT OTHERWISE SPECIFIED
CONNECTION STYLEINVERTED FLARE LOCATION NOT OTHERWISE SPECIFIED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 29
5280Interchangeable
interchangeable cross-reference
interchangeable
1243BM1665M5820Interchangeable
interchangeable cross-reference
interchangeable
M-1243,BM1665,M5820Interchangeable
interchangeable cross-reference
interchangeable
770-9Interchangeable
interchangeable cross-reference
interchangeable
383112Interchangeable
interchangeable cross-reference
interchangeable
B107.10Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
Ready to buy 2D56?
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 2D56?
2D56 is a CONNECTOR,MULTIPLE,FLUID PRESSUR.
What parts can replace 2D56?
There are 29 known substitutes for 2D56: 5280, 1243BM1665M5820, M-1243,BM1665,M5820 and 26 more. Substitute compatibility should be verified for your specific system.
Is 2D56 still available?
2D56 is currently cancelled.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 2D56

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026