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7H3171 ✓ 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,RECEPTACLE,ELECTRICAL. Key specifications include shape: ROUND, material: STEEL COMP 304, blade_type: BACKWARD CURVE, case_style: SQUARE, flow_angle: 90.0 DEGREES SECOND END, head_style: FILLISTER EXTENDED WASHER. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-042-8988, 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
7H3171
NSN: 4730-00-042-8988
FSC: 4730
CAGE: U3363 — CATERPILLAR TRACTOR CO LTD (GBR)
SPECIFICATIONS
shapeROUND
materialSTEEL COMP 304
blade_typeBACKWARD CURVE
case_styleSQUARE
flow_angle90.0 DEGREES SECOND END
head_styleFILLISTER EXTENDED WASHER
hub_length0.300 INCHES NOMINAL AND 1.100 INCHES NOMINAL IN
point_typeCONVENTIONAL
seal_width0.375 INCHES NOMINAL IN
seat_angle45.0 DEGREES FIRST END
body_length0.250 INCHES NOMINAL IN
design_typeSINGLE WIDTH
NSN4730-00-042-8988
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 7H3171 · 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 27
1945HX1Interchangeable
interchangeable cross-reference
interchangeable
109B1-4Interchangeable
interchangeable cross-reference
interchangeable
A908196Interchangeable
interchangeable cross-reference
interchangeable
15037Interchangeable
interchangeable cross-reference
interchangeable
570208Interchangeable
interchangeable cross-reference
interchangeable
53-805Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 7H3171?
7H3171 is a CONNECTOR,RECEPTACLE,ELECTRICAL.
What parts can replace 7H3171?
There are 27 known substitutes for 7H3171: 1945HX1, 109B1-4, A908196 and 24 more. Substitute compatibility should be verified for your specific system.
Is 7H3171 still available?
7H3171 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