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G337 ✓ 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

FILTER,RADIO FREQUENCY INTERFERE. Key specifications include angle: 30.0 DEGREES, height: 1.375 INCHES NOMINAL IN, material: IRON ALLOY AND IRON CAST, shank_length: 0.375 INCHES NOMINAL IN, taper_length: 0.437 INCHES NOMINAL IN, bore_diameter: 0.3350 INCHES MINIMUM AND 0.3370 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-172-0052, 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
G337
NSN: 4730-00-172-0052
FSC: 4730
CAGE: 78385 — MEGGITT TROY INC (USA)
SPECIFICATIONS
angle30.0 DEGREES
height1.375 INCHES NOMINAL IN
materialIRON ALLOY AND IRON CAST
shank_length0.375 INCHES NOMINAL IN
taper_length0.437 INCHES NOMINAL IN
bore_diameter0.3350 INCHES MINIMUM AND 0.3370 INCHES MAXIMUM IN
overall_length2.802 INCHES NOMINAL IN
aa_end_diameter0.625 INCHES NOMINAL IN
bore_counterboreNOT INCLUDED
bore_countersinkINCLUDED
outside_diameter0.657 INCHES NOMINAL IN
special_featuresW/SYNTHETIC RUBBER CHECK VALVE
NSN4730-00-172-0052
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: G337 · 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
•
HEIGHT: 1.375 INCHES NOMINAL IN
•
ANGLE: 30.0 DEGREES
•
THREAD QUANTITY PER INCH: 27
•
NOMINAL THREAD SIZE: 0.125 INCHES IN
•
ASSEMBLY CLEARANCE RADIUS: 0.500 INCHES NOMINAL IN
•
WIDTH ACROSS FLATS: 0.438 INCHES NOMINAL IN
•
SCREW THREAD SERIES DESIGNATOR: NPT
TECHNICAL CHARACTERISTICS (FLIS)
HEIGHT1.375 INCHES NOMINAL IN
SPECIAL FEATURESW/SYNTHETIC RUBBER CHECK VALVE
ANGLE30.0 DEGREES
THREAD QUANTITY PER INCH27
NOMINAL THREAD SIZE0.125 INCHES IN
ASSEMBLY CLEARANCE RADIUS0.500 INCHES NOMINAL IN
WIDTH ACROSS FLATS0.438 INCHES NOMINAL IN
SCREW THREAD SERIES DESIGNATORNPT
SURFACE TREATMENTCADMIUM OVERALL
STYLE DESIGNATORANGLE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 27
5145Interchangeable
interchangeable cross-reference
interchangeable
NAV147-4Interchangeable
interchangeable cross-reference
interchangeable
1-692Interchangeable
interchangeable cross-reference
interchangeable
1551F11Interchangeable
interchangeable cross-reference
interchangeable
1551F11-2Interchangeable
interchangeable cross-reference
interchangeable
RD11-32INPIL0TInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is G337?
G337 is a FILTER,RADIO FREQUENCY INTERFERE.
What parts can replace G337?
There are 27 known substitutes for G337: 5145, NAV147-4, 1-692 and 24 more. Substitute compatibility should be verified for your specific system.
Is G337 still available?
G337 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