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Technical Data Sheet
PartsTable / MRO / R198
R198 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
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

RESISTOR,VARIABLE,WIRE WOUND,NON. Key specifications include material: STEEL COMP 321, body_style: CYLINDRICAL BUSHING MOUNTED, shaft_style: ROUND, flange_width: 0.215 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN, actuator_type: SINGLE SHAFT, overall_length: 0.433 INCHES MINIMUM AND 0.453 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-446-7938, 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
MRO→ MRO_GENERAL→ R198
NSN: 4730-00-446-7938
FSC: 4730
CAGE: 07482 — GENERAL ELECTRIC COMPANY (USA)
SPECIFICATIONS
materialSTEEL COMP 321
body_styleCYLINDRICAL BUSHING MOUNTED
shaft_styleROUND
flange_width0.215 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN
actuator_typeSINGLE SHAFT
overall_length0.433 INCHES MINIMUM AND 0.453 INCHES MAXIMUM IN
section_quantity1
style_designatorCOMPRESSION
seat_angle_in_deg37.0
flange_face_diameter0.683 INCHES NOMINAL IN
flange_inside_diameter0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN
casehardening_indicatorNOT CASEHARDENED
NSN4730-00-446-7938
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: R198 · 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
•
HOSE/TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 0.500 INCHES NOMINAL IN
•
SLEEVE OUTSIDE DIAMETER: 0.680 INCHES MINIMUM AND 0.683 INCHES MAXIMUM IN
•
FLANGE FACE DIAMETER: 0.683 INCHES NOMINAL IN
•
FLANGE WIDTH: 0.215 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN
•
FLANGE INSIDE DIAMETER: 0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN
•
SEAT ANGLE IN DEG: 37.0
•
STYLE DESIGNATOR: COMPRESSION
•
FLANGE OUTSIDE DIAMETER: 0.680 INCHES MINIMUM AND 0.683 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
HOSE/TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED0.500 INCHES NOMINAL IN
SLEEVE OUTSIDE DIAMETER0.680 INCHES MINIMUM AND 0.683 INCHES MAXIMUM IN
FLANGE FACE DIAMETER0.683 INCHES NOMINAL IN
FLANGE WIDTH0.215 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN
FLANGE INSIDE DIAMETER0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN
SEAT ANGLE IN DEG37.0
STYLE DESIGNATORCOMPRESSION
FLANGE OUTSIDE DIAMETER0.680 INCHES MINIMUM AND 0.683 INCHES MAXIMUM IN
DISTANCE FROM FLANGED END TO TUBING CLEARANCE HOLE0.166 INCHES NOMINAL IN
MATERIALSTEEL COMP 321
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
R198Interchangeable
interchangeable cross-reference
interchangeable
R19BInterchangeable
interchangeable cross-reference
interchangeable
R198P08Interchangeable
Same NIIN cross-reference
interchangeable
4730PL0785141Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is R198?
R198 is a RESISTOR,VARIABLE,WIRE WOUND,NON. It is classified as a MRO (MRO_GENERAL).
What parts can replace R198?
There are 4 known substitutes for R198: R198, R19B, R198P08 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for R198?
R198 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-446-7938. 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