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PartsTable / COMPONENT / CB551-3-4
CB551-3-4 ✓ 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 ADAPTER,STRAIGHT,PIPE TO TUBE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 360 OVERALL, nut_style: TUBE COUPLING, nut_height: 1.500 INCHES NOMINAL IN, seat_angle: 45.00 DEGREES NOMINAL, thread_series: UNS, thread_direction: RIGHT-HAND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-014-4309, 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
CB551-3-4
NSN: 4730-00-014-4309
FSC: 4730
CAGE: 13829 — PARKER HANNIFIN CORPORATION DIV CYLINDER DIVISION (USA)
SPECIFICATIONS
materialCOPPER ALLOY 360 OVERALL
nut_styleTUBE COUPLING
nut_height1.500 INCHES NOMINAL IN
seat_angle45.00 DEGREES NOMINAL
thread_seriesUNS
thread_directionRIGHT-HAND
width_across_flats1.250 INCHES NOMINAL IN
nominal_thread_size1.062 INCHES IN
thread_pitch_diameters+1.0161 TO 1.0230 INCHES IN
smallest_inside_diameter0.755 INCHES NOMINAL IN
thread_quantity_per_inch14
nondefinitive_spec/std_data4 FIGURE
NSN4730-00-014-4309
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: CB551-3-4 · 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
•
SMALLEST INSIDE DIAMETER: 0.755 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-B-626,1/2 H FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD QUANTITY PER INCH: 14
•
MATERIAL: COPPER ALLOY 360 OVERALL
•
NUT HEIGHT: 1.500 INCHES NOMINAL IN
•
SEAT ANGLE: 45.00 DEGREES NOMINAL
•
THREAD SERIES: UNS
•
NUT STYLE: TUBE COUPLING
TECHNICAL CHARACTERISTICS (FLIS)
SMALLEST INSIDE DIAMETER0.755 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-B-626,1/2 H FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD QUANTITY PER INCH14
MATERIALCOPPER ALLOY 360 OVERALL
NUT HEIGHT1.500 INCHES NOMINAL IN
SEAT ANGLE45.00 DEGREES NOMINAL
THREAD SERIESUNS
NUT STYLETUBE COUPLING
NOMINAL THREAD SIZE1.062 INCHES IN
NOMINAL TUBE OUTSIDE DIAMETER0.750 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
43FS1-2Interchangeable
interchangeable cross-reference
interchangeable
J512Interchangeable
interchangeable cross-reference
interchangeable
41FS-8Interchangeable
interchangeable cross-reference
interchangeable
10111012-101Interchangeable
interchangeable cross-reference
interchangeable
10111012Interchangeable
interchangeable cross-reference
interchangeable
3611607Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is CB551-3-4?
CB551-3-4 is a ADAPTER,STRAIGHT,PIPE TO TUBE.
What parts can replace CB551-3-4?
There are 14 known substitutes for CB551-3-4: 43FS1-2, J512, 41FS-8 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for CB551-3-4?
CB551-3-4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-014-4309. 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