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1581E4PCTP ✓ 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

CONNECTOR,RECEPTACLE,ELECTRICAL. Key specifications include material: PLASTIC, major_diameter: 0.812 INCHES NOMINAL IN, minor_diameter: 0.500 INCHES NOMINAL IN, nominal_overall_length: 3.000 INCHES IN, nominal_outside_diameter_tube_accommodated: 0.750 INCHES IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-289-0595, 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
1581E4PCTP
NSN: 4730-00-289-0595
FSC: 4730
CAGE: 30760 — INGERSOLL RAND CO (USA)
SPECIFICATIONS
materialPLASTIC
major_diameter0.812 INCHES NOMINAL IN
minor_diameter0.500 INCHES NOMINAL IN
nominal_overall_length3.000 INCHES IN
nominal_outside_diameter_tube_accommodated0.750 INCHES IN
NSN4730-00-289-0595
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 1581E4PCTP · 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
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.750 INCHES IN
•
MATERIAL: PLASTIC
•
MINOR DIAMETER: 0.500 INCHES NOMINAL IN
•
MAJOR DIAMETER: 0.812 INCHES NOMINAL IN
•
NOMINAL OVERALL LENGTH: 3.000 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.750 INCHES IN
MATERIALPLASTIC
MINOR DIAMETER0.500 INCHES NOMINAL IN
MAJOR DIAMETER0.812 INCHES NOMINAL IN
NOMINAL OVERALL LENGTH3.000 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 30
MIL-P-15742-5/8INInterchangeable
interchangeable cross-reference
interchangeable
MILP15742Interchangeable
interchangeable cross-reference
interchangeable
F3116132PC39Interchangeable
interchangeable cross-reference
interchangeable
B5450TBPGInterchangeable
interchangeable cross-reference
interchangeable
3261283Interchangeable
interchangeable cross-reference
interchangeable
P-375-16GJSSInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1581E4PCTP?
1581E4PCTP is a CONNECTOR,RECEPTACLE,ELECTRICAL.
What parts can replace 1581E4PCTP?
There are 30 known substitutes for 1581E4PCTP: MIL-P-15742-5/8IN, MILP15742, F3116132PC39 and 27 more. Substitute compatibility should be verified for your specific system.
Is 1581E4PCTP still available?
1581E4PCTP is currently cancelled.
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PartsTable Design LLC · partstable.com
Last verified: July 2026