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1660-99-603 — PIPE,AIR CONDITIONING-HEATING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

1660-99-603: PIPE,AIR CONDITIONING-HEATING.

The PIPE,AIR CONDITIONING-HEATING is a the manufacturer industrial component. Key specifications include shape: ROUND, material: STEEL CORROSION RESISTING TUBING, hole_diameter: 0.197 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, overall_width: 4.900 INCHES NOMINAL IN, aperture_width: 7.000 INCHES NOMINAL IN, overall_length: 8.100 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-469-0706, 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
1660-99-603
NSN: 5330-00-469-0706
NIINs: 004690706, 004690720, 004690727, 004690730, 004690731, 004690739, 004690743, 004690752, 004690753, 004690768, 004690770, 004690796, 004690809, 004690815
FSC: 5330 — Packing and Gasket Materials
CAGE: 99995 — NATO STOCK NUMBER ASSIGNED BY ANOTHER NATION
SPECIFICATIONS
shapeROUND
materialSTEEL CORROSION RESISTING TUBING
hole_diameter0.197 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
overall_width4.900 INCHES NOMINAL IN
aperture_width7.000 INCHES NOMINAL IN
overall_length8.100 INCHES NOMINAL IN
aperture_length7.000 INCHES NOMINAL IN
outside_diameter4.500 INCHES NOMINAL IN
special_featuresMETAL SURFACE PAINTED COLOR WHITE
features_providedSUPPORT BRACKET
mating_end_quantity2 SINGLE END
bolt_circle_diameter3.875 INCHES NOMINAL IN
NSN5330-00-469-0706
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 1660-99-603 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 THICKNESS: 0.031 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
OUTSIDE DIAMETER: 4.500 INCHES NOMINAL IN
•
BOLT CIRCLE DIAMETER: 3.875 INCHES NOMINAL IN
•
HOLE DIAMETER: 0.197 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL THICKNESS0.031 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
OUTSIDE DIAMETER4.500 INCHES NOMINAL IN
BOLT CIRCLE DIAMETER3.875 INCHES NOMINAL IN
HOLE DIAMETER0.197 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
SUBSTITUTES & CROSS-REFERENCES 1
F280074Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1660-99-603?
1660-99-603 is a PIPE,AIR CONDITIONING-HEATING.
What parts can replace 1660-99-603?
There is 1 known substitute for 1660-99-603: F280074. Substitute compatibility should be verified for your specific system.
What is the NSN for 1660-99-603?
1660-99-603 is cataloged in the U.S. Government catalog under NSN 5330-00-469-0706. 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.