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S661 — DISK,SOLID,PLAIN

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

S661: DISK,SOLID,PLAIN.

The DISK,SOLID,PLAIN is a the manufacturer industrial component. Key specifications include material: PLASTIC LOCATION NOT OTHERWISE SPECIFIED, sterility: STERILE, design_type: THREE-WAY, needle_adapter: INCLUDED, male_adapter_end: INCLUDED, special_features: PRESSURE ADJUSTMENT CONTROL,TRANSPARENT TUBING. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-597-4166, 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
S661
NSN: 5340-00-597-4166
NIINs: 005974166, 009467161
FSC: 5340 — Hardware, Commercial
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialPLASTIC LOCATION NOT OTHERWISE SPECIFIED
sterilitySTERILE
design_typeTHREE-WAY
needle_adapterINCLUDED
male_adapter_endINCLUDED
special_featuresPRESSURE ADJUSTMENT CONTROL,TRANSPARENT TUBING
attached_tubing_length20.000 INCHES NOMINAL IN
female_adapter_end_quantity2
disposition_after_initial_useDISPOSABLE
NSN5340-00-597-4166
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: S661 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
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-F-5656 MIL SPEC SINGLE MATERIAL RESPONSE
•
DIAMETER: 2.6875 INCHES NOMINAL IN
•
THICKNESS: 1.000 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-F-5656 MIL SPEC SINGLE MATERIAL RESPONSE
DIAMETER2.6875 INCHES NOMINAL IN
SPECIAL FEATURESMATERIAL: FELT
THICKNESS1.000 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is S661?
S661 is a DISK,SOLID,PLAIN.
What is the NSN for S661?
S661 is cataloged in the U.S. Government catalog under NSN 5340-00-597-4166. 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.