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Technical Data Sheet
PartsTable / COMPONENT / 98979
98979 ✓ 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

PISTON,INTERNAL COMBUSTION ENGIN. Key specifications include weight: 7.0 OUNCES OZ, diameter: 2.617 INCHES NOMINAL IN, material: ALUMINUM ALLOY, head_style: FLAT, oil_groove: NOT INCLUDED, skirt_type: SOLID. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-362-4356, 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
98979
NSN: 4730-00-362-4356
FSC: 4730
CAGE: 14541 — COOPER MACHINERY SERVICES LLC (USA)
SPECIFICATIONS
weight7.0 OUNCES OZ
diameter2.617 INCHES NOMINAL IN
materialALUMINUM ALLOY
head_styleFLAT
oil_grooveNOT INCLUDED
skirt_typeSOLID
carbon_grooveNOT INCLUDED
overall_height2.688 INCHES NOMINAL IN
surface_finishFINISHED
oil_passage_typeSLOT LOCATION NOT OTHERWISE SPECIFIED
pin_hole_bushingNOT INCLUDED
pinhole_diameter0.6720 INCHES NOMINAL IN
NSN4730-00-362-4356
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 98979 · 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 5
29407Interchangeable
interchangeable cross-reference
interchangeable
99153Interchangeable
interchangeable cross-reference
interchangeable
R1-2455Interchangeable
interchangeable cross-reference
interchangeable
R1-745Interchangeable
interchangeable cross-reference
interchangeable
SIZEN045-18INInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 98979?
98979 is a PISTON,INTERNAL COMBUSTION ENGIN.
What parts can replace 98979?
There are 5 known substitutes for 98979: 29407, 99153, R1-2455 and 2 more. Substitute compatibility should be verified for your specific system.
Is 98979 still available?
98979 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