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4181857 — ADAPTER,STRAIGHT,FLANGE TO HOSE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

4181857: ADAPTER,STRAIGHT,FLANGE TO HOSE.

ADAPTER,STRAIGHT,FLANGE TO HOSE. Key specifications include flange_shape: RECTANGULAR WITH HOLES FIRST END, connection_type: FLANGE FIRST END, bolt_hole_quantity: 4 FIRST END, nominal_overall_length: 1.65 INCHES IN, end_item_identification: 4210-01-622-0440, nominal_outside_diameter: 2.95 INCHES SECOND END IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-656-6871, 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
4181857
NSN: 4730-01-656-6871
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 0CME1 — NOTT COMPANY (USA)
SPECIFICATIONS
flange_shapeRECTANGULAR WITH HOLES FIRST END
connection_typeFLANGE FIRST END
bolt_hole_quantity4 FIRST END
nominal_overall_length1.65 INCHES IN
end_item_identification4210-01-622-0440
nominal_outside_diameter2.95 INCHES SECOND END IN
bolt_hole_nominal_diameter0.24 INCHES FIRST END IN
part_name_assigned_by_controlling_agencyFLANGE,DUCT,STRAIGHT,3.0;
center_to_center_nominal_distance_between_bolt_holes_along_width2.83 INCHES FIRST END IN
center_to_center_nominal_distance_between_bolt_holes_along_length2.83 INCHES FIRST END IN
NSN4730-01-656-6871
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 4181857 · 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 SHAPE: RECTANGULAR WITH HOLES FIRST END
•
NOMINAL OVERALL LENGTH: 1.65 INCHES IN
•
CONNECTION TYPE: UNTHREADED EXTERNAL HOSE SECOND END
•
BOLT HOLE NOMINAL DIAMETER: 0.24 INCHES FIRST END IN
•
CENTER TO CENTER NOMINAL DISTANCE BETWEEN BOLT HOLES ALONG WIDTH: 2.83 INCHES FIRST END IN
•
NOMINAL OUTSIDE DIAMETER: 2.95 INCHES SECOND END IN
•
BOLT HOLE QUANTITY: 4 FIRST END
TECHNICAL CHARACTERISTICS
FLANGE SHAPERECTANGULAR WITH HOLES FIRST END
NOMINAL OVERALL LENGTH1.65 INCHES IN
CONNECTION TYPEUNTHREADED EXTERNAL HOSE SECOND END
CONNECTION TYPEFLANGE FIRST END
BOLT HOLE NOMINAL DIAMETER0.24 INCHES FIRST END IN
CENTER TO CENTER NOMINAL DISTANCE BETWEEN BOLT HOLES ALONG WIDTH2.83 INCHES FIRST END IN
NOMINAL OUTSIDE DIAMETER2.95 INCHES SECOND END IN
BOLT HOLE QUANTITY4 FIRST END
CENTER TO CENTER NOMINAL DISTANCE BETWEEN BOLT HOLES ALONG LENGTH2.83 INCHES FIRST END IN
PART NAME ASSIGNED BY CONTROLLING AGENCYFLANGE,DUCT,STRAIGHT,3.0;
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 4181857?
4181857 is a ADAPTER,STRAIGHT,FLANGE TO HOSE.
What is the NSN for 4181857?
4181857 is cataloged in the U.S. Government catalog under NSN 4730-01-656-6871. This indicates validated use in U.S. government and defense supply chains.
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