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Technical Data Sheet
PartsTable / COMPONENT / 2640-611
2640-611 ✓ 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 TAILPIECE,UNION is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING FLOW CONTROL DEVICE, bonnet_type: INSIDE SCREW, connection_type: UNTHREADED INTERNAL TUBE ALL ENDS, connection_style: SOCKET WITH BRAZING RING (TUBE) ALL ENDS, style_designator: STRAIGHT THRU, operating_pressure: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-096-3492, 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
2640-611
NSN: 4730-01-096-3492
FSC: 4730
CAGE: 96169 — ELECTRIC BOAT CORPORATION DIV GENERAL DYNAMICS ELECTRIC BOAT (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING FLOW CONTROL DEVICE
bonnet_typeINSIDE SCREW
connection_typeUNTHREADED INTERNAL TUBE ALL ENDS
connection_styleSOCKET WITH BRAZING RING (TUBE) ALL ENDS
style_designatorSTRAIGHT THRU
operating_pressure3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
valve_operation_methodMANUAL
bonnet_attachment_methodTHREADED
media_for_which_designedHYDRAULIC FLUID, MINERAL BASE SINGLE RESPONSE
furnished_items_and_quantity2 NUT AND 2 TAILPIECE
nominal_pipe_size_accommodated0.500 INCHES ALL ENDS IN
nominal_outside_diameter_tube_accommodated1.500 INCHES ALL ENDS IN
NSN4730-01-096-3492
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 2640-611 · 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: STRAIGHT FACE
•
NOMINAL PIPE SIZE DESIGNATION: 0.250 INCHES IN
•
END CONNECTION TYPE: BRAZED
TECHNICAL CHARACTERISTICS (FLIS)
SEAT TYPESTRAIGHT FACE
NOMINAL PIPE SIZE DESIGNATION0.250 INCHES IN
END CONNECTION TYPEBRAZED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
SS845-2050997ASSYB1-4INInterchangeable
interchangeable cross-reference
interchangeable
845-2050997-HInterchangeable
interchangeable cross-reference
interchangeable
SS845-2050997Interchangeable
interchangeable cross-reference
interchangeable
SS845-2050997ASSYB PIECE 13Interchangeable
interchangeable cross-reference
interchangeable
2640-611 ASSYB PIECE 13Interchangeable
interchangeable cross-reference
interchangeable
2640-611 ASSY B LOCK A-CInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2640-611?
2640-611 is a TAILPIECE,UNION.
What parts can replace 2640-611?
There are 23 known substitutes for 2640-611: SS845-2050997ASSYB1-4IN, 845-2050997-H, SS845-2050997 and 20 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 2640-611?
2640-611 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-096-3492. 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