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716518 ✓ 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

FITTING,LUBRICANT PRESSURE RELIE. Key specifications include overall_width: 4.500 INCHES NOMINAL IN, inclosure_type: OPEN, overall_height: 1.125 INCHES NOMINAL IN, overall_length: 4.750 INCHES NOMINAL IN, mounting_method: UNTHREADED HOLE(S) SINGLE GROUP, frequency_rating: 60.0 HERTZ NOMINAL SINGLE COMPONENT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-378-2590, 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
716518
NSN: 4730-01-378-2590
FSC: 4730
CAGE: 80254 — TEXTRON LYCOMING INC WILLIAMSPORT PLANT (USA)
SPECIFICATIONS
overall_width4.500 INCHES NOMINAL IN
inclosure_typeOPEN
overall_height1.125 INCHES NOMINAL IN
overall_length4.750 INCHES NOMINAL IN
mounting_methodUNTHREADED HOLE(S) SINGLE GROUP
frequency_rating60.0 HERTZ NOMINAL SINGLE COMPONENT
reliability_indicatorNOT ESTABLISHED
mounting_hole_diameter0.147 INCHES NOMINAL SINGLE GROUP IN
end_item_identificationHARNISCHFEGER CORP.;MODEL M320T2 CRANE TRUCK MOUNTED,NSN 3810-00-151-4431
saturation_current_rating40.0 MILLIAMPERES
winding_operating_voltage33.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
mounting_facility_quantity4 SINGLE GROUP
NSN4730-01-378-2590
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 716518 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
A3838Y77Interchangeable
interchangeable cross-reference
interchangeable
71651Interchangeable
interchangeable cross-reference
interchangeable
40300Interchangeable
interchangeable cross-reference
interchangeable
A109-6-5Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 716518?
716518 is a FITTING,LUBRICANT PRESSURE RELIE.
What parts can replace 716518?
There are 4 known substitutes for 716518: A3838Y77, 71651, 40300 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 716518?
716518 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-378-2590. 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