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34665 ✓ Verified by PartsTable
Trefl · 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

REVERSE BAND,AUTOMATIC TRANSMISS. Key specifications include length: 0.772 INCHES NOMINAL IN, material: ALUMINUM ALLOY OVERALL, insert_size: 0.557 IN. MIN 0.559 IN.

MAX INSERT DIA IN, flange_thickness: 0.220 INCHES MINIMUM AND 0.230 INCHES MAXIMUM IN, surface_treatment: NICKEL OVERALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-618-8589, 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
34665
NSN: 4730-00-618-8589
FSC: 4730
CAGE: 13841 — TIFFIN PARTS, L.L.C. DIV SUBSIDIARY OF PETTIBONE CORP. (USA)
SPECIFICATIONS
length0.772 INCHES NOMINAL IN
materialALUMINUM ALLOY OVERALL
insert_size0.557 IN. MIN 0.559 IN. MAX INSERT DIA IN
flange_thickness0.220 INCHES MINIMUM AND 0.230 INCHES MAXIMUM IN
special_featuresFLANGE COUNTESUNK; THREE HOLES IN FLANGE FACE 0.190 IN. MIN 0.200 IN. MAXDIA ON 0.809 IN. MIN 0.815 IN. MAX DIA BLT HOLE CTR IN
surface_treatmentNICKEL OVERALL
NSN4730-00-618-8589
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 34665 · Trefl ⚠ 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 DIRECTION: RIGHT-HAND
•
NUT STYLE: TUBE COUPLING
•
MATERIAL: COPPER ALLOY OR STEEL COMP 12L14 OVERALL
•
NOMINAL THREAD SIZE: 0.500 INCHES IN
•
THREAD QUANTITY PER INCH: 20
•
LENGTH TO SHOULDER: 0.579 INCHES NOMINAL IN
•
SEAT ANGLE: 37.0 DEGREES NOMINAL
•
NOMINAL TUBE OUTSIDE DIAMETER: 0.312 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HAND
NUT STYLETUBE COUPLING
MATERIALCOPPER ALLOY OR STEEL COMP 12L14 OVERALL
NOMINAL THREAD SIZE0.500 INCHES IN
THREAD QUANTITY PER INCH20
LENGTH TO SHOULDER0.579 INCHES NOMINAL IN
SEAT ANGLE37.0 DEGREES NOMINAL
NOMINAL TUBE OUTSIDE DIAMETER0.312 INCHES IN
FABRICATION METHODMACHINED
THREAD CLASS2B
VERIFIED SUBSTITUTES & CROSS-REFERENCES 33
11240409-5Interchangeable
interchangeable cross-reference
interchangeable
3-2149-7Interchangeable
interchangeable cross-reference
interchangeable
A318Interchangeable
interchangeable cross-reference
interchangeable
AN818-20JInterchangeable
interchangeable cross-reference
interchangeable
GN10FA-20Interchangeable
interchangeable cross-reference
interchangeable
8 070110BInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 34665?
34665 is a REVERSE BAND,AUTOMATIC TRANSMISS manufactured by Trefl.
What parts can replace 34665?
There are 33 known substitutes for 34665: 11240409-5, 3-2149-7, A318 and 30 more. Substitute compatibility should be verified for your specific system.
Is 34665 still available?
34665 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