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Technical Data Sheet
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633-178 ✓ 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 RESTRICTOR,FLUID FLOW is a the manufacturer industrial component. Key specifications include length: 2.094 INCHES NOMINAL IN, material: NICKEL ALLOY OR NICKEL ALLOY 400, design_type: PLATE, orifice_diameter: 0.266 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN, outside_diameter: 0.562 INCHES NOMINAL IN, special_features: STAGE 4. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-196-7696, 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
633-178
NSN: 4730-01-196-7696
FSC: 4730
CAGE: 09647 — AQUA-CHEM, INC. (USA)
SPECIFICATIONS
length2.094 INCHES NOMINAL IN
materialNICKEL ALLOY OR NICKEL ALLOY 400
design_typePLATE
orifice_diameter0.266 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN
outside_diameter0.562 INCHES NOMINAL IN
special_featuresSTAGE 4
thread_provisionUNTHREADED LOCATION NOT OTHERWISE SPECIFIED
hose/tube_size_for_which_designed1-3/4 IN.OD TUBE IN
NSN4730-01-196-7696
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 633-178 · 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
•
THREAD PROVISION: UNTHREADED LOCATION NOT OTHERWISE SPECIFIED
•
DESIGN TYPE: PLATE
•
MATERIAL: COPPER ALLOY 706
TECHNICAL CHARACTERISTICS (FLIS)
THREAD PROVISIONUNTHREADED LOCATION NOT OTHERWISE SPECIFIED
DESIGN TYPEPLATE
SPECIAL FEATURESSTAGE 2 AND 5,1.312 IN. DIA IN
MATERIALCOPPER ALLOY 706
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
482424Interchangeable
interchangeable cross-reference
interchangeable
507Interchangeable
interchangeable cross-reference
interchangeable
13217E0570Interchangeable
interchangeable cross-reference
interchangeable
633D7657 PIECE 23Interchangeable
interchangeable cross-reference
interchangeable
72C32Interchangeable
interchangeable cross-reference
interchangeable
633-D7657-000 PIECE 23Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 633-178?
633-178 is a RESTRICTOR,FLUID FLOW.
What parts can replace 633-178?
There are 21 known substitutes for 633-178: 482424, 507, 13217E0570 and 18 more. Substitute compatibility should be verified for your specific system.
Is 633-178 still available?
633-178 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