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Technical Data Sheet
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AN737TW22 ✓ 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 CLAMP,HOSE is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, overall_width: 0.500 INCHES MINIMUM AND 0.594 INCHES MAXIMUM IN, inside_diameter: 0.438 INCHES MINIMUM AND 0.688 INCHES MAXIMUM IN, special_features: W/INNER SHOE;USED ON GRUMMAN AIRCRAFT,MODEL A10;WEAPON SYSTEM ESSENTIAL, style_designator: WIRE, surface_treatment: PASSIVATE OVERALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-278-9200, 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
AN737TW22
NSN: 4730-00-278-9200
FSC: 4730
CAGE: 88044 — AERONAUTICAL STANDARDS GROUP DEPT OF NAVY AND AIR FORCE (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
overall_width0.500 INCHES MINIMUM AND 0.594 INCHES MAXIMUM IN
inside_diameter0.438 INCHES MINIMUM AND 0.688 INCHES MAXIMUM IN
special_featuresW/INNER SHOE;USED ON GRUMMAN AIRCRAFT,MODEL A10;WEAPON SYSTEM ESSENTIAL
style_designatorWIRE
surface_treatmentPASSIVATE OVERALL
fastening_device_typeSLOTTED HEXAGON HEAD SCREW
end_item_identificationGRUMMAN A-10 AIRCRAFT;AIRCRAFT, F-16
criticality_code_justificationFEAT
surface_treatment_document_and_classificationQQ-P-416,CL1,TY 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN4730-00-278-9200
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AN737TW22 · 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
•
CRITICALITY CODE JUSTIFICATION: FEAT
•
INSIDE DIAMETER: 0.438 INCHES MINIMUM AND 0.688 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,CL1,TY 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
STYLE DESIGNATOR: WIRE
•
SURFACE TREATMENT: PASSIVATE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
CRITICALITY CODE JUSTIFICATIONFEAT
OVERALL WIDTH0.500 INCHES MINIMUM AND 0.594 INCHES MAXIMUM IN
INSIDE DIAMETER0.438 INCHES MINIMUM AND 0.688 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,CL1,TY 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
STYLE DESIGNATORWIRE
SURFACE TREATMENTPASSIVATE OVERALL
END ITEM IDENTIFICATIONGRUMMAN A-10 AIRCRAFT;AIRCRAFT, F-16
SPECIAL FEATURESW/INNER SHOE;USED ON GRUMMAN AIRCRAFT,MODEL A10;WEAPON SYSTEM ESSENTIAL
MATERIALSTEEL CORROSION RESISTING OVERALL
FASTENING DEVICE TYPESLOTTED HEXAGON HEAD SCREW
VERIFIED SUBSTITUTES & CROSS-REFERENCES 30
AN737TW44-48Interchangeable
interchangeable cross-reference
interchangeable
HK9C24-44/48Interchangeable
interchangeable cross-reference
interchangeable
45D13-4Interchangeable
interchangeable cross-reference
interchangeable
AN73TW56-66Interchangeable
interchangeable cross-reference
interchangeable
HK9C24-56/66Interchangeable
interchangeable cross-reference
interchangeable
AN737TW-56/66Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AN737TW22?
AN737TW22 is a CLAMP,HOSE.
What parts can replace AN737TW22?
There are 30 known substitutes for AN737TW22: AN737TW44-48, HK9C24-44/48, 45D13-4 and 27 more. Substitute compatibility should be verified for your specific system.
Is AN737TW22 still available?
AN737TW22 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