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Technical Data Sheet
PartsTable / COMPONENT / 6B9940
6B9940 ✓ 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

The ADAPTER,STRAIGHT,PIPE TO TUBE is a the manufacturer industrial component. Key specifications include length: 1.250 INCHES NOMINAL IN, diameter: 0.125 INCHES NOMINAL IN, material: COPPER ALLOY OVERALL, thickness: 0.023 INCHES MINIMUM AND 0.028 INCHES MAXIMUM IN, body_diameter: 5.250 INCHES NOMINAL IN, hole_diameter: 0.1905 INCHES MINIMUM AND 0.1945 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-289-1924, 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
6B9940
NSN: 4730-00-289-1924
FSC: 4730
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
length1.250 INCHES NOMINAL IN
diameter0.125 INCHES NOMINAL IN
materialCOPPER ALLOY OVERALL
thickness0.023 INCHES MINIMUM AND 0.028 INCHES MAXIMUM IN
body_diameter5.250 INCHES NOMINAL IN
hole_diameter0.1905 INCHES MINIMUM AND 0.1945 INCHES MAXIMUM IN
mounting_shankINCLUDED
overall_length17.510 INCHES NOMINAL IN
overall_diameter0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN
special_featuresPRESHAPED CABLE
style_designatorFLANGE, WITHOUT FINS
termination_typeCOAXIAL LINE FLANGE
NSN4730-00-289-1924
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 6B9940 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
4SBWInterchangeable
interchangeable cross-reference
interchangeable
JH-2Interchangeable
interchangeable cross-reference
interchangeable
155470Interchangeable
interchangeable cross-reference
interchangeable
205418Interchangeable
interchangeable cross-reference
interchangeable
J246Interchangeable
interchangeable cross-reference
interchangeable
BB9168Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 6B9940?
6B9940 is a ADAPTER,STRAIGHT,PIPE TO TUBE.
What parts can replace 6B9940?
There are 23 known substitutes for 6B9940: 4SBW, JH-2, 155470 and 20 more. Substitute compatibility should be verified for your specific system.
Is 6B9940 still available?
6B9940 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026