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Technical Data Sheet
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9940-1 — Technical Data Sheet

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— · 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 BEARING,BALL,ANNULAR is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, overall_length: 0.6250 INCHES NOMINAL IN, style_designator: SOLID, PLAIN, NO OUTSIDE FLANGES, body_inside_diameter: 3.9970 INCHES NOMINAL IN, body_outside_diameter: 4.0000 INCHES NOMINAL IN, end_item_identification: GEARBOX ASSEMBLY. This part is cataloged in the Federal Logistics Information System under NSN 4730-00-278-5006, 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
9940-1
NSN: 4730-00-278-5006
FSC: 4730
CAGE: 00198 — PRATT & WHITNEY CANADA CORP DIV PRATT & WHITNEY CANADA CORP. (CAN)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
overall_length0.6250 INCHES NOMINAL IN
style_designatorSOLID, PLAIN, NO OUTSIDE FLANGES
body_inside_diameter3.9970 INCHES NOMINAL IN
body_outside_diameter4.0000 INCHES NOMINAL IN
end_item_identificationGEARBOX ASSEMBLY
part_name_assigned_by_controlling_agencySHAFT REPAIR SPEEDI-SLEEVE
NSN4730-00-278-5006
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 9940-1 · 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
•
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 0.250 INCHES NOMINAL IN
•
NONDEFINITIVE SPEC/STD DATA: 32 FIGURE
•
OPERATING PRESSURE: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
•
STYLE DESIGNATOR: CAP, TUBE, FLARED
•
MATERIAL: ALUMINUM ALLOY 2014 OVERALL
•
THREAD SERIES DESIGNATOR: UNF INTERNAL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/4,T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625,TY 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED0.250 INCHES NOMINAL IN
NONDEFINITIVE SPEC/STD DATA32 FIGURE
OPERATING PRESSURE3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
STYLE DESIGNATORCAP, TUBE, FLARED
MATERIALALUMINUM ALLOY 2014 OVERALL
THREAD SERIES DESIGNATORUNF INTERNAL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/4,T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENTANODIZE OVERALL
THREAD CLASS3B INTERNAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 32
2781-4InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
RH19B25InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
16028P11InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
4CInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
AN74A6InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
6026-7156-48InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 9940-1?
9940-1 is a BEARING,BALL,ANNULAR.
What parts can replace 9940-1?
There are 32 known substitutes for 9940-1: 2781-4, RH19B25, 16028P11 and 29 more. Substitute compatibility should be verified for your specific system.
Is 9940-1 still available?
9940-1 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: October 2026