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6661650-1 — CLAMP,SYNCHRO

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

6661650-1: CLAMP,SYNCHRO.

The CLAMP,SYNCHRO is a the manufacturer industrial component. Key specifications include width: 0.500 INCHES NOMINAL IN, height: 0.720 INCHES NOMINAL IN, length: 0.720 INCHES NOMINAL IN, material: ALUMINUM ALLOY 5083, thread_class: 3B, hole_diameter: 0.190 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-369-0834, 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
6661650-1
NSN: 5340-01-369-0834
FSC: 5340 — Hardware, Commercial
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
width0.500 INCHES NOMINAL IN
height0.720 INCHES NOMINAL IN
length0.720 INCHES NOMINAL IN
materialALUMINUM ALLOY 5083
thread_class3B
hole_diameter0.190 INCHES NOMINAL IN
effective_height0.590 INCHES NOMINAL IN
effective_length0.314 INCHES NOMINAL IN
special_featuresALT. MATERIALS-H112,H321,H323,H32-UNS A95083 ALUMINUM
style_designatorSQUARE
surface_treatmentCHROMATE
nominal_thread_size0.190 INCHES IN
NSN5340-01-369-0834
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 6661650-1 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
•
LENGTH: 0.720 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-C-5541,CL 1A MIL SPEC SINGLE TREATMENT RESPONSE A
•
STYLE DESIGNATOR: SQUARE
•
EFFECTIVE LENGTH: 0.314 INCHES NOMINAL IN
•
NOMINAL THREAD SIZE: 0.190 INCHES IN
•
EFFECTIVE HEIGHT: 0.590 INCHES NOMINAL IN
•
HEIGHT: 0.720 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
LENGTH0.720 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-5541,CL 1A MIL SPEC SINGLE TREATMENT RESPONSE A
STYLE DESIGNATORSQUARE
EFFECTIVE LENGTH0.314 INCHES NOMINAL IN
NOMINAL THREAD SIZE0.190 INCHES IN
EFFECTIVE HEIGHT0.590 INCHES NOMINAL IN
HEIGHT0.720 INCHES NOMINAL IN
SPECIAL FEATURESALT. MATERIALS-H112,H321,H323,H32-UNS A95083 ALUMINUM
SURFACE TREATMENTCHROMATE
OUTSIDE EDGE TO BOLT HOLE CENTER DISTANCE ALONG LENGTH0.406 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 6661650-1?
6661650-1 is a CLAMP,SYNCHRO.
What is the NSN for 6661650-1?
6661650-1 is cataloged in the U.S. Government catalog under NSN 5340-01-369-0834. 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.