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A6689-040-142 — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

A6689-040-142: O-RING.

The O-RING is a the manufacturer industrial component. Key specifications include material: PLASTIC POLYTETRAFLUOROETHYLENE, end_item_identification: VALVE,RELIEF 1.50NPS, criticality_code_justification: ZZZY, part_name_assigned_by_controlling_agency: (INAVY) O-RING,HEAD, reference_number_differentiating_characteristics: CLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D. This part is cataloged in the U.S.

Government catalog under NSN 5331-00-425-1596, 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
A6689-040-142
NSN: 5331-00-425-1596
NIINs: 004251596, 004722632, 015473083
FSC: 5331 — O-ring
CAGE: 01343 — ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY (USA)
SPECIFICATIONS
materialPLASTIC POLYTETRAFLUOROETHYLENE
end_item_identificationVALVE,RELIEF 1.50NPS
criticality_code_justificationZZZY
part_name_assigned_by_controlling_agency(INAVY) O-RING,HEAD
reference_number_differentiating_characteristicsCLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D
NSN5331-00-425-1596
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: A6689-040-142 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
CROSS-SECTIONAL HEIGHT: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 2.849 INCHES MINIMUM AND 2.879 INCHES MAXIMUM IN
•
MATERIAL: PLASTIC POLYTETRAFLUOROETHYLENE
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
CENTER HOLE DIAMETER2.849 INCHES MINIMUM AND 2.879 INCHES MAXIMUM IN
MATERIALPLASTIC POLYTETRAFLUOROETHYLENE
SUBSTITUTES & CROSS-REFERENCES 2
06689040142Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
A6689.040.142CPReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is A6689-040-142?
A6689-040-142 is a O-RING.
What parts can replace A6689-040-142?
There are 2 known substitutes for A6689-040-142: 06689040142, A6689.040.142CP. Substitute compatibility should be verified for your specific system.
What is the NSN for A6689-040-142?
A6689-040-142 is cataloged in the U.S. Government catalog under NSN 5331-00-425-1596. 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.