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Technical Data Sheet
PartsTable / COMPONENT / 2601-4-2
2601-4-2 ✓ 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,TUBE TO BOSS is a the manufacturer industrial component. Key specifications include body_width: 2.0 INCHES NOMINAL IN, body_length: 2.5 INCHES NOMINAL IN, overall_height: 2.0 INCHES NOMINAL IN, special_features: HOUR COUNTER, BATTERY INDICATOR 24V V, part_name_assigned_by_controlling_agency: HOURMETER. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-522-1909, 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
2601-4-2
NSN: 4730-00-522-1909
FSC: 4730
CAGE: 5E240 — BRENNAN INDUSTRIES (USA)
SPECIFICATIONS
body_width2.0 INCHES NOMINAL IN
body_length2.5 INCHES NOMINAL IN
overall_height2.0 INCHES NOMINAL IN
special_featuresHOUR COUNTER, BATTERY INDICATOR 24V V
part_name_assigned_by_controlling_agencyHOURMETER
NSN4730-00-522-1909
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 2601-4-2 · 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
•
NONDEFINITIVE SPEC/STD DATA: 5D FIGURE
•
SEAT ANGLE: 37.0 DEGREES SECOND END
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.250 INCHES FIRST END IN
•
CONNECTION STYLE: FLARED (TUBE) SECOND END
•
THREAD CLASS: 2A SECOND END A
•
CONNECTION TYPE: THREADED EXTERNAL TUBE FIRST END
TECHNICAL CHARACTERISTICS (FLIS)
NONDEFINITIVE SPEC/STD DATA5D FIGURE
SEAT ANGLE37.0 DEGREES SECOND END
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.250 INCHES FIRST END IN
CONNECTION STYLEFLARED (TUBE) SECOND END
CONNECTION STYLEFLARED (TUBE) FIRST END
SEAT ANGLE37.0 DEGREES FIRST END
THREAD CLASS2A SECOND END A
CONNECTION TYPETHREADED EXTERNAL TUBE FIRST END
CONNECTION STYLEPLAIN (PIPE) THIRD END
NOMINAL THREAD SIZE0.438 INCHES SECOND END IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
1444Interchangeable
interchangeable cross-reference
interchangeable
9444Interchangeable
interchangeable cross-reference
interchangeable
0110-0019Interchangeable
interchangeable cross-reference
interchangeable
4330PL1523170Interchangeable
interchangeable cross-reference
interchangeable
SC125Interchangeable
interchangeable cross-reference
interchangeable
300223-453Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2601-4-2?
2601-4-2 is a ADAPTER,STRAIGHT,TUBE TO BOSS.
What parts can replace 2601-4-2?
There are 22 known substitutes for 2601-4-2: 1444, 9444, 0110-0019 and 19 more. Substitute compatibility should be verified for your specific system.
Is 2601-4-2 still available?
2601-4-2 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026