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Technical Data Sheet
PartsTable / COMPONENT / 6126B
6126B ✓ 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 FLANGE,PIPE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY, thickness: 0.418 INCHES NOMINAL IN, neck_height: 0.628 INCHES NOMINAL IN, flange_diameter: 4.250 INCHES NOMINAL IN, style_designator: ROUND, ONE BOLT HOLE CIRCLE, bolt_hole_diameter: 0.563 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-074-7948, 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
6126B
NSN: 4730-01-074-7948
FSC: 4730
CAGE: 93236 — DRESSER-RAND CO WORTHINGTON COMPRESSOR OPN A JOINT VENTURE (USA)
SPECIFICATIONS
materialCOPPER ALLOY
thickness0.418 INCHES NOMINAL IN
neck_height0.628 INCHES NOMINAL IN
flange_diameter4.250 INCHES NOMINAL IN
style_designatorROUND, ONE BOLT HOLE CIRCLE
bolt_hole_diameter0.563 INCHES NOMINAL IN
bolt_hole_quantity4
bolt_circle_diameter3.125 INCHES NOMINAL IN
flange_section_stylePLAIN FACE, LAPPED JOINT WELDING NECK
end_item_identificationEYN STURGEN CLASS SSN (637)
face_seating_surface_conditionMACHINED
material_document_and_classificationQQ-C-390,ALLOY D4 FED SPEC SINGLE MATERIAL RESPONSE
NSN4730-01-074-7948
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 6126B · 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
•
BOLT CIRCLE DIAMETER: 3.125 INCHES NOMINAL IN
•
STYLE DESIGNATOR: ROUND, ONE BOLT HOLE CIRCLE
•
FACE SEATING SURFACE CONDITION: MACHINED
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-C-390,ALLOY D4 FED SPEC SINGLE MATERIAL RESPONSE
•
FLANGE DIAMETER: 4.250 INCHES NOMINAL IN
•
BOLT HOLE QUANTITY: 4
•
NECK HEIGHT: 0.628 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
END ITEM IDENTIFICATIONEYN STURGEN CLASS SSN (637)
BOLT CIRCLE DIAMETER3.125 INCHES NOMINAL IN
STYLE DESIGNATORROUND, ONE BOLT HOLE CIRCLE
FACE SEATING SURFACE CONDITIONMACHINED
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-C-390,ALLOY D4 FED SPEC SINGLE MATERIAL RESPONSE
FLANGE DIAMETER4.250 INCHES NOMINAL IN
BOLT HOLE QUANTITY4
NECK HEIGHT0.628 INCHES NOMINAL IN
MATERIALCOPPER ALLOY
FLANGE SECTION STYLEPLAIN FACE, LAPPED JOINT WELDING NECK
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
6291BInterchangeable
interchangeable cross-reference
interchangeable
200114L PC297Interchangeable
interchangeable cross-reference
interchangeable
200114LInterchangeable
interchangeable cross-reference
interchangeable
6014BInterchangeable
interchangeable cross-reference
interchangeable
200113XPC307Interchangeable
interchangeable cross-reference
interchangeable
200113X PIECE 305Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 6126B?
6126B is a FLANGE,PIPE.
What parts can replace 6126B?
There are 9 known substitutes for 6126B: 6291B, 200114L PC297, 200114L and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 6126B?
6126B is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-074-7948. 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