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R44371D-20 — CAP,TUBE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

R44371D-20: CAP,TUBE.

The CAP,TUBE is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2024 OVERALL, thread_class: 3B INTERNAL, connection_style: PLAIN (OPTIONAL END), style_designator: CAP, thread_direction: RIGHT-HAND INTERNAL, surface_treatment: ANODIZE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-549-4777, 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
R44371D-20
NSN: 4730-00-549-4777
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 50599 — PARKER-HANNIFIN CORPORATION DBA PNEUTRONICS DIV STRATOFLEX PRODUCT DIVISION (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2024 OVERALL
thread_class3B INTERNAL
connection_stylePLAIN (OPTIONAL END)
style_designatorCAP
thread_directionRIGHT-HAND INTERNAL
surface_treatmentANODIZE OVERALL
nominal_thread_size1.516 INCHES INTERNAL IN
thread_quantity_per_inch14 INTERNAL
thread_series_designatorUNJS INTERNAL
material_document_and_classificationQQ-A-225/6,T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
tube_outside_diameter_for_which_designed1.250 INCHES NOMINAL IN
surface_treatment_document_and_classificationMIL-A-8625,TY 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN4730-00-549-4777
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: R44371D-20 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-8625,TY 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
CONNECTION STYLE: PLAIN (OPTIONAL END)
•
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 1.250 INCHES NOMINAL IN
•
STYLE DESIGNATOR: CAP
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/6,T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND INTERNAL
•
NOMINAL THREAD SIZE: 1.516 INCHES INTERNAL IN
•
SURFACE TREATMENT: ANODIZE OVERALL
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625,TY 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
CONNECTION STYLEPLAIN (OPTIONAL END)
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED1.250 INCHES NOMINAL IN
STYLE DESIGNATORCAP
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/6,T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND INTERNAL
NOMINAL THREAD SIZE1.516 INCHES INTERNAL IN
SURFACE TREATMENTANODIZE OVERALL
THREAD CLASS3B INTERNAL
THREAD QUANTITY PER INCH14 INTERNAL
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES 1
10158072Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Demilitarization required — critical (Q)
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FREQUENTLY ASKED QUESTIONS
What is R44371D-20?
R44371D-20 is a CAP,TUBE.
What parts can replace R44371D-20?
There is 1 known substitute for R44371D-20: 10158072. Substitute compatibility should be verified for your specific system.
What is the NSN for R44371D-20?
R44371D-20 is cataloged in the U.S. Government catalog under NSN 4730-00-549-4777. 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.