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PartsTable / COMPONENT / MSS SP-83
MSS SP-83 ✓ 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 UNION,PIPE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, seat_type: BEVELED, reducer_type: CONCENTRIC, connection_type: UNTHREADED INTERNAL PIPE ALL ENDS, operating_pressure: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS, coupling_flange_shape: HEXAGON. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-822-4775, 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
MSS SP-83
NSN: 4730-00-822-4775
FSC: 4730
CAGE: 59646 — MANUFACTURERS STANDARDIZATION SOCIETY OF THE VALVE AND FITTINGS INDUSTRY INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
seat_typeBEVELED
reducer_typeCONCENTRIC
connection_typeUNTHREADED INTERNAL PIPE ALL ENDS
operating_pressure3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
coupling_flange_shapeHEXAGON
nominal_overall_length1.938 INCHES IN
media_for_which_designedWATER-OIL-GAS SINGLE RESPONSE
nominal_pipe_size_accommodated0.500 INCHES ALL ENDS IN
material_document_and_classificationASTM A105,GR2 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
pipe_wall_thickness_designation_for_which_designedSCHEDULE 80 ALL ENDS
NSN4730-00-822-4775
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MSS SP-83 · 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
•
SEAT TYPE: BEVELED
•
STYLE DESIGNATOR: SCREWED
•
CRITICALITY CODE JUSTIFICATION: FEAT
•
THREAD SERIES DESIGNATOR: NPT SECOND END
•
COUPLING FLANGE SHAPE: HEXAGON
•
NOMINAL OVERALL LENGTH: 2.312 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
SEAT TYPEBEVELED
STYLE DESIGNATORSCREWED
SPECIAL FEATURESSPECIALLY CLEANED FOR OXYGEN-NITROGEN
CRITICALITY CODE JUSTIFICATIONFEAT
THREAD SERIES DESIGNATORNPT SECOND END
COUPLING FLANGE SHAPEHEXAGON
THREAD SERIES DESIGNATORNPT FIRST END
NOMINAL OVERALL LENGTH2.312 INCHES IN
CONNECTION TYPETHREADED INTERNAL PIPE SECOND END
NOMINAL THREAD SIZE0.750 INCHES FIRST END IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
2224Interchangeable
interchangeable cross-reference
interchangeable
D15-328KPC191Interchangeable
interchangeable cross-reference
interchangeable
D15-613APC191Interchangeable
interchangeable cross-reference
interchangeable
D15-703FPC191Interchangeable
interchangeable cross-reference
interchangeable
XMD18Interchangeable
interchangeable cross-reference
interchangeable
BR7SInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MSS SP-83?
MSS SP-83 is a UNION,PIPE.
What parts can replace MSS SP-83?
There are 15 known substitutes for MSS SP-83: 2224, D15-328KPC191, D15-613APC191 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MSS SP-83?
MSS SP-83 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-822-4775. 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