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3A0137B — REDUCER,TUBE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

3A0137B: REDUCER,TUBE.

The REDUCER,TUBE is a the manufacturer industrial component. Key specifications include shape: ROUND, material: STEEL OVERALL, body_style: SIDE BARRIER TYPE, bore_shape: STRAIGHT, bulb_style: T ("U" SHAPED TUBULAR), head_angle: 15.0 DEGREES NOMINAL. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-202-9539, 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
3A0137B
NSN: 4730-00-202-9539
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 62265 — VOLVO TRUCKS NORTH AMERICA, INC. DBA (FOREIGN PARENT IS VOLVO LASTVAGNAR AB, GOTEBORG, SWEDEN.) (USA)
SPECIFICATIONS
shapeROUND
materialSTEEL OVERALL
body_styleSIDE BARRIER TYPE
bore_shapeSTRAIGHT
bulb_styleT ("U" SHAPED TUBULAR)
head_angle15.0 DEGREES NOMINAL
lens_colorCOLORLESS AND RED
bonnet_typeINSIDE SCREW
design_typeDRY
intake_holeNOT INCLUDED
temp_rating-40.0 FAHRENHEIT AND 200.0 FAHRENHEIT SINGLE RESPONSE DEGF
valve_recessNOT INCLUDED
NSN4730-00-202-9539
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 3A0137B · 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
SUBSTITUTES & CROSS-REFERENCES 8
78744Reference document
Same NSN cross-reference
Reference document — Secondary reference
DX5611Reference document
Same NSN cross-reference
Reference document — Secondary reference
166JXReference document
Same NSN cross-reference
Reference document — Secondary reference
12981Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
15913HAReference document
Same NSN cross-reference
Reference document — Secondary reference
796722C1Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 3A0137B?
3A0137B is a REDUCER,TUBE.
What parts can replace 3A0137B?
There are 8 known substitutes for 3A0137B: 78744, DX5611, 166JX and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3A0137B?
3A0137B is cataloged in the U.S. Government catalog under NSN 4730-00-202-9539. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.