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PartsTable / COMPONENT / T4275-40
T4275-40 ✓ 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 PUMP,COOLING SYSTEM,ENGINE is a the manufacturer thermal management component critical for maintaining optimal operating temperatures in enterprise hardware. Key specifications include material: COPPER ALLOY OVERALL, inside_diameter: 2.250 INCHES NOMINAL IN, style_designator: BAND, application/function: GENERAL PURPOSE USE, fastening_device_type: PLAIN SLOTTED HEAD SCREW, nondefinitive_spec/std_data: 1 TABLE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-769-8509, 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
T4275-40
NSN: 4730-00-769-8509
FSC: 4730
CAGE: 28474 — HEWITT-ROBINS DIV LITTON SYSTEMS INC (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
inside_diameter2.250 INCHES NOMINAL IN
style_designatorBAND
application/functionGENERAL PURPOSE USE
fastening_device_typePLAIN SLOTTED HEAD SCREW
nondefinitive_spec/std_data1 TABLE
NSN4730-00-769-8509
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: T4275-40 · 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
•
INSIDE DIAMETER: 2.250 INCHES NOMINAL IN
•
APPLICATION/FUNCTION: GENERAL PURPOSE USE
•
FASTENING DEVICE TYPE: PLAIN SLOTTED HEAD SCREW
•
MATERIAL: COPPER ALLOY OVERALL
•
NONDEFINITIVE SPEC/STD DATA: 1 TABLE
•
STYLE DESIGNATOR: BAND
TYPICAL APPLICATIONS
  • Server thermal management and cooling
  • Hot-swap fan replacement in production environments
  • Redundant cooling for high-availability systems
TECHNICAL CHARACTERISTICS (FLIS)
INSIDE DIAMETER2.250 INCHES NOMINAL IN
APPLICATION/FUNCTIONGENERAL PURPOSE USE
FASTENING DEVICE TYPEPLAIN SLOTTED HEAD SCREW
MATERIALCOPPER ALLOY OVERALL
NONDEFINITIVE SPEC/STD DATA1 TABLE
STYLE DESIGNATORBAND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
P94Interchangeable
interchangeable cross-reference
interchangeable
MIL-R-6855Interchangeable
interchangeable cross-reference
interchangeable
PC-452Interchangeable
interchangeable cross-reference
interchangeable
251-381Interchangeable
interchangeable cross-reference
interchangeable
D2TZ-8501-AInterchangeable
interchangeable cross-reference
interchangeable
1-33-248Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is T4275-40?
T4275-40 is a PUMP,COOLING SYSTEM,ENGINE.
What parts can replace T4275-40?
There are 11 known substitutes for T4275-40: P94, MIL-R-6855, PC-452 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for T4275-40?
T4275-40 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-769-8509. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026