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MS18308 — FLANGE,PIPE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

MS18308: FLANGE,PIPE.

The FLANGE,PIPE is a the manufacturer industrial component. Key specifications include material: STEEL, thickness: 0.562 INCHES NOMINAL IN, neck_height: 0.500 INCHES NOMINAL IN, socket_depth: 0.375 INCHES NOMINAL IN, flange_diameter: 3.750 INCHES NOMINAL IN, socket_diameter: 0.690 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-174-5937, 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
MS18308
NSN: 4730-00-174-5937
NIINs: 001745937, 001745938
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
materialSTEEL
thickness0.562 INCHES NOMINAL IN
neck_height0.500 INCHES NOMINAL IN
socket_depth0.375 INCHES NOMINAL IN
flange_diameter3.750 INCHES NOMINAL IN
socket_diameter0.690 INCHES NOMINAL IN
style_designatorROUND, ONE BOLT HOLE CIRCLE
bolt_hole_diameter0.562 INCHES NOMINAL IN
bolt_hole_quantity4
raised_face_height0.250 INCHES NOMINAL IN
bolt_circle_diameter2.625 INCHES NOMINAL IN
flange_section_styleRAISED FACE, SOCKET NECK
NSN4730-00-174-5937
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MS18308 · 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
•
SOCKET DIAMETER: 0.555 INCHES NOMINAL IN
•
FLANGE DIAMETER: 3.375 INCHES NOMINAL IN
•
FACE SEATING SURFACE CONDITION: SERRATED
•
NOMINAL PIPE SIZE FOR WHICH DESIGNED: 0.250 INCHES IN
•
MAXIMUM OPERATING TEMP AND MEDIA FOR WHICH DESIGNED: 850.0 FAHRENHEIT STEAM AND 425.0 FAHRENHEIT WATER DEGF
•
OPERATING PRESSURE AND TYPE: 600.0 POUNDS PER SQUARE INCH (PSI) STEAM MAXIMUM REQUIRED AND 1000.0 POUNDS PER SQUARE INCH (PSI) WATER MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS
•
FLANGE SECTION STYLE: RAISED FACE, SOCKET NECK
•
STYLE DESIGNATOR: ROUND, ONE BOLT HOLE CIRCLE
TECHNICAL CHARACTERISTICS
SOCKET DIAMETER0.555 INCHES NOMINAL IN
FLANGE DIAMETER3.375 INCHES NOMINAL IN
FACE SEATING SURFACE CONDITIONSERRATED
NOMINAL PIPE SIZE FOR WHICH DESIGNED0.250 INCHES IN
MAXIMUM OPERATING TEMP AND MEDIA FOR WHICH DESIGNED850.0 FAHRENHEIT STEAM AND 425.0 FAHRENHEIT WATER DEGF
OPERATING PRESSURE AND TYPE600.0 POUNDS PER SQUARE INCH (PSI) STEAM MAXIMUM REQUIRED AND 1000.0 POUNDS PER SQUARE INCH (PSI) WATER MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS
FLANGE SECTION STYLERAISED FACE, SOCKET NECK
STYLE DESIGNATORROUND, ONE BOLT HOLE CIRCLE
BOLT HOLE DIAMETER0.562 INCHES NOMINAL IN
NECK HEIGHT0.500 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 3
MS18308-1/4Reference document
Same NSN cross-reference
Reference document — Secondary reference
MS18308-1/4INCHSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
5000S4823-64496Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MS18308?
MS18308 is a FLANGE,PIPE.
What parts can replace MS18308?
There are 3 known substitutes for MS18308: MS18308-1/4, MS18308-1/4INCH, 5000S4823-64496. Substitute compatibility should be verified for your specific system.
What is the NSN for MS18308?
MS18308 is cataloged in the U.S. Government catalog under NSN 4730-00-174-5937. 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.