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D-718-00ITEM 56 — COUPLING,SHAFT,RIGID

✓ Government record, cited
— · PIPE SECTION
PRODUCT OVERVIEW

D-718-00ITEM 56: COUPLING,SHAFT,RIGID.

The COUPLING,SHAFT,RIGID is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR TUBE, exterior_color: BLACK, inside_diameter: 1.250 INCHES NOMINAL IN, outside_diameter: 1.688 INCHES NOMINAL IN, inside_surface_condition: SMOOTH, cross-sectional_shape_style: ROUND. This part is cataloged in the U.S.

Government catalog under NSN 4720-01-089-5685, 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
D-718-00ITEM 56
NSN: 4720-01-089-5685
FSC: 4720 — Hose and Flexible Tubing
CAGE: 26636 — LEWIS CORP (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR TUBE
exterior_colorBLACK
inside_diameter1.250 INCHES NOMINAL IN
outside_diameter1.688 INCHES NOMINAL IN
inside_surface_conditionSMOOTH
cross-sectional_shape_styleROUND
measuring_method_and_length36.000 INCHES NOMINAL OVERALL IN
NSN4720-01-089-5685
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: D-718-00ITEM 56 · OEM ⚠ VERIFY BEFORE ORDERING Schedule = wall thickness, NOT pipe diameter. Sch 40 and Sch 80 have the same OD but different wall thickness. Nominal pipe size ≠ actual OD — a 1" pipe is actually 1.315" OD ✓ BROKER TIP Sch 40 = standard wall, Sch 80 = heavy wall (higher pressure), Sch 160 = extra heavy. Seamless pipe is required for high-pressure applications — welded pipe has lower ratings PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
MEASURING METHOD AND LENGTH: 36.000 INCHES NOMINAL OVERALL IN
•
CROSS-SECTIONAL SHAPE STYLE: ROUND
•
OUTSIDE DIAMETER: 1.688 INCHES NOMINAL IN
•
EXTERIOR COLOR: BLACK
•
INSIDE DIAMETER: 1.250 INCHES NOMINAL IN
•
INSIDE SURFACE CONDITION: SMOOTH
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR TUBE
TECHNICAL CHARACTERISTICS
MEASURING METHOD AND LENGTH36.000 INCHES NOMINAL OVERALL IN
CROSS-SECTIONAL SHAPE STYLEROUND
OUTSIDE DIAMETER1.688 INCHES NOMINAL IN
EXTERIOR COLORBLACK
INSIDE DIAMETER1.250 INCHES NOMINAL IN
INSIDE SURFACE CONDITIONSMOOTH
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR TUBE
SUBSTITUTES & CROSS-REFERENCES 2
CST-114-3Reference document
Same NSN cross-reference
Reference document — Secondary reference
D-718-00Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is D-718-00ITEM 56?
D-718-00ITEM 56 is a COUPLING,SHAFT,RIGID.
What parts can replace D-718-00ITEM 56?
There are 2 known substitutes for D-718-00ITEM 56: CST-114-3, D-718-00. Substitute compatibility should be verified for your specific system.
What is the NSN for D-718-00ITEM 56?
D-718-00ITEM 56 is cataloged in the U.S. Government catalog under NSN 4720-01-089-5685. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.