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4D9 — ADAPTER,STRAIGHT,PIPE TO HOSE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

4D9: ADAPTER,STRAIGHT,PIPE TO HOSE.

The ADAPTER,STRAIGHT,PIPE TO HOSE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: SLOTTED, HEXAGON, nut_height: 0.473 INCHES MINIMUM AND 0.496 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UNF, hardness_rating: 69.0 ROCKWELL B MINIMUM AND 32.0 ROCKWELL C MAXIMUM. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-063-8096, 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
4D9
NSN: 4730-00-063-8096
NIINs: 000638096, 008506884
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 14127 — FOSTER MANUFACTURING CO, INC. DBA FOSTER MANUFACTURING CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleSLOTTED, HEXAGON
nut_height0.473 INCHES MINIMUM AND 0.496 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNF
hardness_rating69.0 ROCKWELL B MINIMUM AND 32.0 ROCKWELL C MAXIMUM
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL
width_across_flats0.861 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
nominal_thread_size0.562 INCHES IN
bearing_surface_typeCHAMFERED OR WASHER FACED
thread_quantity_per_inch18
NSN4730-00-063-8096
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 4D9 · 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
KEY FEATURES
•
FURNISHED ITEMS AND QUANTITY: 1 HOSE COUPLING NUT
•
CONNECTION STYLE: GRIPPING NIPPLE (NOSE) SECOND END
•
NOMINAL INSIDE DIAMETER HOSE ACCOMMODATED: 0.375 INCHES SECOND END IN
•
NOMINAL OUTSIDE DIAMETER HOSE ACCOMMODATED: 0.688 INCHES SECOND END IN
•
NOMINAL OVERALL LENGTH: 1.875 INCHES IN
•
NOMINAL THREAD SIZE: 0.375 INCHES FIRST END IN
•
SURFACE TREATMENT: CADMIUM BODY
TECHNICAL CHARACTERISTICS
FURNISHED ITEMS AND QUANTITY1 HOSE COUPLING NUT
CONNECTION STYLEGRIPPING NIPPLE (NOSE) SECOND END
CONNECTION STYLEPLAIN (PIPE) FIRST END
NOMINAL INSIDE DIAMETER HOSE ACCOMMODATED0.375 INCHES SECOND END IN
NOMINAL OUTSIDE DIAMETER HOSE ACCOMMODATED0.688 INCHES SECOND END IN
NOMINAL OVERALL LENGTH1.875 INCHES IN
NOMINAL THREAD SIZE0.375 INCHES FIRST END IN
SURFACE TREATMENTCADMIUM BODY
MATERIALSTEEL BODY
MATERIALCOPPER ALLOY NUT
SUBSTITUTES & CROSS-REFERENCES 3
54B6745H10Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
54B6745Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
334E8Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4D9?
4D9 is a ADAPTER,STRAIGHT,PIPE TO HOSE.
What parts can replace 4D9?
There are 3 known substitutes for 4D9: 54B6745H10, 54B6745, 334E8. Substitute compatibility should be verified for your specific system.
What is the NSN for 4D9?
4D9 is cataloged in the U.S. Government catalog under NSN 4730-00-063-8096. 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.