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Technical Data Sheet
PartsTable / COMPONENT / 26290
26290 ✓ 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

SUPPORT,STRUCTURAL COMPONENT,AIR. Key specifications include end_item_identification: M. P.

PUMPS,PUMP MODEL FLOMAX 5 AND 8, general_characteristics_item_description: HEAVY DUTY; BALL BEARING; 3/4 IN. SHAFT,EXTRA LG IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-278-9383, 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
26290
NSN: 4730-00-278-9383
FSC: 4730
CAGE: 99167 — HAMILTON SUNDSTRAND CORPORATION (USA)
SPECIFICATIONS
end_item_identificationM. P. PUMPS,PUMP MODEL FLOMAX 5 AND 8
general_characteristics_item_descriptionHEAVY DUTY; BALL BEARING; 3/4 IN. SHAFT,EXTRA LG IN
NSN4730-00-278-9383
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 26290 · 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
•
THREAD CLASS: 3A FIRST END BULKHEAD A
•
MATERIAL: STEEL COMP 4140 OVERALL
•
LEG LENGTH: 0.891 INCHES NOMINAL SECOND END IN
•
CONNECTION STYLE: FLARED (TUBE) ALL ENDS
•
NOMINAL THREAD SIZE: 0.438 INCHES ALL ENDS IN
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL JOINT FINE (UNJF) FIRST END BULKHEAD
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS3A FIRST END BULKHEAD A
MATERIALSTEEL COMP 4140 OVERALL
LEG LENGTH0.891 INCHES NOMINAL SECOND END IN
CONNECTION STYLEFLARED (TUBE) ALL ENDS
LEG LENGTH0.953 INCHES NOMINAL THIRD END IN
THREAD CLASS3A ALL ENDS A
NOMINAL THREAD SIZE0.438 INCHES ALL ENDS IN
THREAD SERIES DESIGNATORUNIFIED NATIONAL JOINT FINE (UNJF) FIRST END BULKHEAD
SEAT ANGLE37.0 DEGREES ALL ENDS
NOMINAL THREAD SIZE0.438 INCHES FIRST END BULKHEAD IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
26290Interchangeable
interchangeable cross-reference
interchangeable
AL26290Interchangeable
interchangeable cross-reference
interchangeable
QQ-A-200/11Interchangeable
interchangeable cross-reference
interchangeable
3111763Interchangeable
Same NIIN cross-reference
interchangeable
4730PL0651233Interchangeable
Same NIIN cross-reference
interchangeable
AN804-4Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 26290?
26290 is a SUPPORT,STRUCTURAL COMPONENT,AIR.
What parts can replace 26290?
There are 7 known substitutes for 26290: 26290, AL26290, QQ-A-200/11 and 4 more. Substitute compatibility should be verified for your specific system.
Is 26290 still available?
26290 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