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B140A — RING,WEARING

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

B140A: RING,WEARING.

The RING,WEARING is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY, corner_shape: SQUARE ALL CORNERS, groove_width: 0.125 INCHES NOMINAL IN, overall_length: 0.625 INCHES NOMINAL IN, surface_finish: 125.0 MICROINCHES ALL SURFACES, body_inside_diameter: 4.875 INCHES MINIMUM AND 4.877 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 4320-00-604-1995, 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
B140A
NSN: 4320-00-604-1995
FSC: 4320 — Power and Hand Pumps
CAGE: 63857 — CIRCOR NAVAL SOLUTIONS LLC DBA WARREN PUMPS (USA)
SPECIFICATIONS
materialNICKEL ALLOY
corner_shapeSQUARE ALL CORNERS
groove_width0.125 INCHES NOMINAL IN
overall_length0.625 INCHES NOMINAL IN
surface_finish125.0 MICROINCHES ALL SURFACES
body_inside_diameter4.875 INCHES MINIMUM AND 4.877 INCHES MAXIMUM IN
body_outside_diameter5.375 INCHES MINIMUM AND 5.377 INCHES MAXIMUM IN
NSN4320-00-604-1995
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available RING,WEARING TITLE COMPONENT PN B140A MFR RING,WEARING
KEY FEATURES
•
SURFACE FINISH: 125.0 MICROINCHES ALL SURFACES
•
CORNER SHAPE: SQUARE ALL CORNERS
•
BODY OUTSIDE DIAMETER: 5.375 INCHES MINIMUM AND 5.377 INCHES MAXIMUM IN
•
BODY INSIDE DIAMETER: 4.875 INCHES MINIMUM AND 4.877 INCHES MAXIMUM IN
•
MATERIAL: NICKEL ALLOY
•
GROOVE WIDTH: 0.125 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
SURFACE FINISH125.0 MICROINCHES ALL SURFACES
CORNER SHAPESQUARE ALL CORNERS
BODY OUTSIDE DIAMETER5.375 INCHES MINIMUM AND 5.377 INCHES MAXIMUM IN
OVERALL LENGTH0.625 INCHES NOMINAL IN
BODY INSIDE DIAMETER4.875 INCHES MINIMUM AND 4.877 INCHES MAXIMUM IN
MATERIALNICKEL ALLOY
GROOVE WIDTH0.125 INCHES NOMINAL IN
OTHER ITEMS IN FSC 4320 — Power and Hand Pumps
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4320-00-001-1633 4320-00-001-2628 4320-00-001-2629 4320-00-001-2630 4320-00-001-2631 4320-00-001-2632 4320-00-001-3377 4320-00-001-3384
SUBSTITUTES & CROSS-REFERENCES 1
R618PC39Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 B140A?
B140A is a RING,WEARING.
What parts can replace B140A?
There is 1 known substitute for B140A: R618PC39. Substitute compatibility should be verified for your specific system.
What is the NSN for B140A?
B140A is cataloged in the U.S. Government catalog under NSN 4320-00-604-1995. 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.