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PartsTable / COMPONENT / 3178-5D
3178-5D ✓ 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 INJECTOR ASSEMBLY,FUEL is a the manufacturer industrial component. Key specifications include material: STEEL COMP 304 OVERALL, flow_angle: 90.0 DEGREES, leg_length: 1.227 INCHES NOMINAL THIRD END IN, seat_angle: 12.0 DEGREES ALL ENDS, body_height: 0.312 INCHES NOMINAL IN, thread_class: 3A ALL ENDS A. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-349-7195, 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
3178-5D
NSN: 4730-00-349-7195
FSC: 4730
CAGE: 99215 — KAISER FLUID TECHNOLOGIES INC. (USA)
SPECIFICATIONS
materialSTEEL COMP 304 OVERALL
flow_angle90.0 DEGREES
leg_length1.227 INCHES NOMINAL THIRD END IN
seat_angle12.0 DEGREES ALL ENDS
body_height0.312 INCHES NOMINAL IN
thread_class3A ALL ENDS A
body_diameter1.219 INCHES NOMINAL IN
terminal_typeTAB W/SCREW
overall_height0.313 INCHES NOMINAL IN
overall_length1.688 INCHES NOMINAL IN
connection_typeTHREADED EXTERNAL TUBE ALL ENDS
mounting_methodBRACKET(S) AND UNTHREADED HOLE(S)
NSN4730-00-349-7195
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 3178-5D · 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 18
36T21 S3773Interchangeable
interchangeable cross-reference
interchangeable
110-354Interchangeable
interchangeable cross-reference
interchangeable
SE11S6261Interchangeable
interchangeable cross-reference
interchangeable
110086Interchangeable
interchangeable cross-reference
interchangeable
AS1009J080408Interchangeable
interchangeable cross-reference
interchangeable
APF508C040808Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3178-5D?
3178-5D is a INJECTOR ASSEMBLY,FUEL.
What parts can replace 3178-5D?
There are 18 known substitutes for 3178-5D: 36T21 S3773, 110-354, SE11S6261 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3178-5D?
3178-5D is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-349-7195. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026