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PartsTable / COMPONENT / FE66-1
FE66-1 ✓ 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

CYLINDER ASSEMBLY,HYDRAULIC BRAK. Key specifications include port_style: GASKET SEAL LOCATION NOT OTHERWISE SPECIFIED, overall_width: 2.375 INCHES NOMINAL IN, overall_height: 5.562 INCHES NOMINAL IN, reservoir_type: INTEGRAL, extended_length: 9.031 INCHES NOMINAL IN, actuation_method: DIRECT. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-278-3397, 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
FE66-1
NSN: 4730-00-278-3397
FSC: 4730
CAGE: 53496 — SCHRAMM, INC. (USA)
SPECIFICATIONS
port_styleGASKET SEAL LOCATION NOT OTHERWISE SPECIFIED
overall_width2.375 INCHES NOMINAL IN
overall_height5.562 INCHES NOMINAL IN
reservoir_typeINTEGRAL
extended_length9.031 INCHES NOMINAL IN
actuation_methodDIRECT
special_featuresPISTON ROD END THD FEMALE STYLE,1.000 IN.DEEP THD IN
thread_directionUNABLE TO DECODE
compressed_length7.594 INCHES NOMINAL IN
port_thread_class2B LOCATION NOT OTHERWISE SPECIFIED
mounting_provisionUNTHREADED MOUNTING HOLES
port_thread_diameter0.562 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
NSN4730-00-278-3397
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: FE66-1 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 28
203064Interchangeable
interchangeable cross-reference
interchangeable
075520Interchangeable
interchangeable cross-reference
interchangeable
311-90090Interchangeable
interchangeable cross-reference
interchangeable
4710000174647Interchangeable
interchangeable cross-reference
interchangeable
103883Interchangeable
interchangeable cross-reference
interchangeable
02744Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is FE66-1?
FE66-1 is a CYLINDER ASSEMBLY,HYDRAULIC BRAK.
What parts can replace FE66-1?
There are 28 known substitutes for FE66-1: 203064, 075520, 311-90090 and 25 more. Substitute compatibility should be verified for your specific system.
Is FE66-1 still available?
FE66-1 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: July 2026