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3B7738 ✓ 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

SYNTHESIZER,ELECTRICAL FREQUENCY. Key specifications include color: BLACK, depth: 30.5 MILLIMETERS NOMINAL MM, width: 2.375 INCHES NOMINAL IN, height: 4.5 MILLIMETERS NOMINAL MM, length: 22.000 INCHES NOMINAL IN, end_type: PLAIN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-196-2055, 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
3B7738
NSN: 4730-00-196-2055
FSC: 4730
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
colorBLACK
depth30.5 MILLIMETERS NOMINAL MM
width2.375 INCHES NOMINAL IN
height4.5 MILLIMETERS NOMINAL MM
length22.000 INCHES NOMINAL IN
end_typePLAIN
materialPLASTIC POLYAMIDE NYLON
thickness0.095 INCHES MAXIMUM IN
base_colorWHITE
base_styleMINIATURE SCREW
body_shapeROUND
body_styleCYLINDRICAL (SCREWED)
NSN4730-00-196-2055
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 3B7738 · 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
9162Interchangeable
interchangeable cross-reference
interchangeable
733631Interchangeable
interchangeable cross-reference
interchangeable
3957Interchangeable
interchangeable cross-reference
interchangeable
269-2004-00Interchangeable
interchangeable cross-reference
interchangeable
NB002Interchangeable
interchangeable cross-reference
interchangeable
PCC003Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3B7738?
3B7738 is a SYNTHESIZER,ELECTRICAL FREQUENCY.
What parts can replace 3B7738?
There are 23 known substitutes for 3B7738: 9162, 733631, 3957 and 20 more. Substitute compatibility should be verified for your specific system.
Is 3B7738 still available?
3B7738 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