PartsTable
Technical Data Sheet
B1G-6131 ✓ 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

ADAPTER,STRAIGHT,FLANGE TO HOSE. Key specifications include material: COPPER ALLOY OVERALL, flange_shape: RECTANGULAR WITH HOLES FIRST END, thread_class: 2B SECOND END, nominal_width: 4.125 INCHES FIRST END IN, nominal_length: 4.188 INCHES FIRST END IN, connection_type: THREADED INTERNAL HOSE SECOND END. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-133-7425, 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
B1G-6131
NSN: 4730-01-133-7425
FSC: 4730
CAGE: 61125 — ECHELON SUPPLY AND SERVICE, INC. (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
flange_shapeRECTANGULAR WITH HOLES FIRST END
thread_class2B SECOND END
nominal_width4.125 INCHES FIRST END IN
nominal_length4.188 INCHES FIRST END IN
connection_typeTHREADED INTERNAL HOSE SECOND END
connection_styleGASKET SEAL (HOSE) SECOND END
nominal_thickness0.342 INCHES FIRST END IN
bolt_hole_quantity4 FIRST END
flange_face_designPLAIN WITH GASKET GROOVE FIRST END
nominal_thread_size3.312 INCHES SECOND END IN
nominal_overall_length1.535 INCHES IN
NSN4730-01-133-7425
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: B1G-6131 · 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 FACE DESIGN: PLAIN WITH GASKET GROOVE FIRST END
NOMINAL THICKNESS: 0.342 INCHES FIRST END IN
BOLT HOLE QUANTITY: 4 FIRST END
CONNECTION STYLE: GASKET SEAL (HOSE) SECOND END
THREAD CLASS: 2B SECOND END
NOMINAL OVERALL LENGTH: 1.535 INCHES IN
NOMINAL LENGTH: 4.188 INCHES FIRST END IN
BOLT HOLE NOMINAL DIAMETER: 0.326 INCHES FIRST END IN
TECHNICAL CHARACTERISTICS (FLIS)
FLANGE FACE DESIGNPLAIN WITH GASKET GROOVE FIRST END
NOMINAL THICKNESS0.342 INCHES FIRST END IN
BOLT HOLE QUANTITY4 FIRST END
CONNECTION STYLEGASKET SEAL (HOSE) SECOND END
THREAD CLASS2B SECOND END
NOMINAL OVERALL LENGTH1.535 INCHES IN
NOMINAL LENGTH4.188 INCHES FIRST END IN
BOLT HOLE NOMINAL DIAMETER0.326 INCHES FIRST END IN
THREAD QUANTITY PER INCH8 SECOND END
FLANGE SHAPERECTANGULAR WITH HOLES FIRST END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
K3Interchangeable
interchangeable cross-reference
interchangeable
23601-00160Interchangeable
interchangeable cross-reference
interchangeable
6131Interchangeable
interchangeable cross-reference
interchangeable
S1635-63333Interchangeable
interchangeable cross-reference
interchangeable
S1635-63333-1Interchangeable
interchangeable cross-reference
interchangeable
1560H34-036-3Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is B1G-6131?
B1G-6131 is a ADAPTER,STRAIGHT,FLANGE TO HOSE.
What parts can replace B1G-6131?
There are 11 known substitutes for B1G-6131: K3, 23601-00160, 6131 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for B1G-6131?
B1G-6131 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-133-7425. This indicates validated use in U.S. government and defense supply chains.
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