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837-166 — REDUCER,PIPE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

837-166: REDUCER,PIPE.

The REDUCER,PIPE is a the manufacturer industrial component. Key specifications include material: PLASTIC POLYVINYL CHLORIDE (PVC) OVERALL, reducer_type: CONCENTRIC, connection_type: UNTHREADED INTERNAL PIPE SECOND END, connection_style: SWIVEL NUT INVERTED FLARE (PIPE) SECOND END, nominal_overall_length: 1.531 INCHES IN, nominal_pipe_size_accommodated: 1.250 INCHES FIRST END IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-004-8069, 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
837-166
NSN: 4730-01-004-8069
NIINs: 010048069, 010071748
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 61623 — NIBCO INC CHEMTROL DIV (USA)
SPECIFICATIONS
materialPLASTIC POLYVINYL CHLORIDE (PVC) OVERALL
reducer_typeCONCENTRIC
connection_typeUNTHREADED INTERNAL PIPE SECOND END
connection_styleSWIVEL NUT INVERTED FLARE (PIPE) SECOND END
nominal_overall_length1.531 INCHES IN
nominal_pipe_size_accommodated1.250 INCHES FIRST END IN
material_document_and_classificationASTM D1784,TY 1,GR1 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
pipe_wall_thickness_designation_for_which_designedSCHEDULE 80 FIRST END
NSN4730-01-004-8069
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 837-166 · 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
•
NOMINAL PIPE SIZE ACCOMMODATED: 1.250 INCHES FIRST END IN
•
CONNECTION STYLE: SOCKET (PIPE) FIRST END
•
NOMINAL OVERALL LENGTH: 1.375 INCHES IN
•
CONNECTION TYPE: UNTHREADED INTERNAL PIPE FIRST END
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM D1784,TY 1,GR1 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS
NOMINAL PIPE SIZE ACCOMMODATED1.250 INCHES FIRST END IN
NOMINAL PIPE SIZE ACCOMMODATED0.500 INCHES SECOND END IN
CONNECTION STYLESOCKET (PIPE) FIRST END
CONNECTION STYLEPLAIN (PIPE) SECOND END
NOMINAL OVERALL LENGTH1.375 INCHES IN
CONNECTION TYPEUNTHREADED INTERNAL PIPE FIRST END
CONNECTION TYPEUNTHREADED EXTERNAL PIPE SECOND END
MATERIAL DOCUMENT AND CLASSIFICATIONASTM D1784,TY 1,GR1 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
PIPE WALL THICKNESS DESIGNATION FOR WHICH DESIGNEDSCHEDULE 80 FIRST END
MATERIALPLASTIC OVERALL
SUBSTITUTES & CROSS-REFERENCES 2
ASTM D2467Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
01049038Reference 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 837-166?
837-166 is a REDUCER,PIPE.
What parts can replace 837-166?
There are 2 known substitutes for 837-166: ASTM D2467, 01049038. Substitute compatibility should be verified for your specific system.
What is the NSN for 837-166?
837-166 is cataloged in the U.S. Government catalog under NSN 4730-01-004-8069. This indicates validated use in U.S. government and defense supply chains.
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