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MS90520A03G — FLANGE,PIPE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

MS90520A03G: FLANGE,PIPE.

The FLANGE,PIPE is a the manufacturer industrial component. Key specifications include material: IRON, thickness: 0.440 INCHES NOMINAL IN, neck_height: 0.250 INCHES NOMINAL IN, flange_diameter: 4.250 INCHES NOMINAL IN, style_designator: ROUND, ONE BOLT HOLE CIRCLE, bolt_hole_diameter: 0.625 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-189-2685, 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
MS90520A03G
NSN: 4730-00-189-2685
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialIRON
thickness0.440 INCHES NOMINAL IN
neck_height0.250 INCHES NOMINAL IN
flange_diameter4.250 INCHES NOMINAL IN
style_designatorROUND, ONE BOLT HOLE CIRCLE
bolt_hole_diameter0.625 INCHES NOMINAL IN
bolt_hole_quantity4
nominal_thread_size1.000 INCHES IN
bolt_circle_diameter3.125 INCHES NOMINAL IN
flange_section_stylePLAIN FACE, RAISED NECK
thread_quantity_per_inch11-1/2
nondefinitive_spec/std_data5 TABLE
NSN4730-00-189-2685
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MS90520A03G · 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
•
FLANGE DIAMETER: 4.250 INCHES NOMINAL IN
•
FACE SEATING SURFACE CONDITION: MACHINED
•
NOMINAL PIPE SIZE FOR WHICH DESIGNED: 1.000 INCHES IN
•
OPERATING PRESSURE AND TYPE: 125.0 POUNDS PER SQUARE INCH (PSI) GAS MAXIMUM REQUIRED AND 175.0 POUNDS PER SQUARE INCH (PSI) WATER MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS
•
FLANGE SECTION STYLE: PLAIN FACE, RAISED NECK
•
STYLE DESIGNATOR: ROUND, ONE BOLT HOLE CIRCLE
•
BOLT HOLE DIAMETER: 0.625 INCHES NOMINAL IN
•
NECK HEIGHT: 0.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
FLANGE DIAMETER4.250 INCHES NOMINAL IN
FACE SEATING SURFACE CONDITIONMACHINED
NOMINAL PIPE SIZE FOR WHICH DESIGNED1.000 INCHES IN
OPERATING PRESSURE AND TYPE125.0 POUNDS PER SQUARE INCH (PSI) GAS MAXIMUM REQUIRED AND 175.0 POUNDS PER SQUARE INCH (PSI) WATER MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS
FLANGE SECTION STYLEPLAIN FACE, RAISED NECK
STYLE DESIGNATORROUND, ONE BOLT HOLE CIRCLE
BOLT HOLE DIAMETER0.625 INCHES NOMINAL IN
NECK HEIGHT0.250 INCHES NOMINAL IN
NOMINAL THREAD SIZE1.000 INCHES IN
SPECIFICATION/STANDARD DATA80204-B16.1 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
SUBSTITUTES & CROSS-REFERENCES 3
WW-F-406ACC03Reference document
Same NSN cross-reference
Reference document — Secondary reference
B16.1Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
WWF406Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MS90520A03G?
MS90520A03G is a FLANGE,PIPE.
What parts can replace MS90520A03G?
There are 3 known substitutes for MS90520A03G: WW-F-406ACC03, B16.1, WWF406. Substitute compatibility should be verified for your specific system.
What is the NSN for MS90520A03G?
MS90520A03G is cataloged in the U.S. Government catalog under NSN 4730-00-189-2685. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.