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660548 — COVER,ACCESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

660548: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include width: 2.500 INCHES NOMINAL IN, length: 3.750 INCHES NOMINAL IN, material: ALUMINUM ALLOY 5052, hole_diameter: 0.166 INCHES MINIMUM AND 0.169 INCHES MAXIMUM IN, features_provided: SPECIAL MARKING, surface_treatment: CHROMATE. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-357-1084, 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
660548
NSN: 5340-01-357-1084
FSC: 5340 — Hardware, Commercial
CAGE: 7N928 — WAYNE INTEGRATED TECHNOLOGIES CORP. (USA)
SPECIFICATIONS
width2.500 INCHES NOMINAL IN
length3.750 INCHES NOMINAL IN
materialALUMINUM ALLOY 5052
hole_diameter0.166 INCHES MINIMUM AND 0.169 INCHES MAXIMUM IN
features_providedSPECIAL MARKING
surface_treatmentCHROMATE
securing_device_typeSPECIAL
first_recess_inside_height1.530 INCHES NOMINAL IN
hole_quantity_along_length4
mounting_opening_shape_styleUNTHREADED HOLE
material_document_and_classificationQQ-A-250/8 H32 FED SPEC SINGLE MATERIAL RESPONSE
surface_treatment_document_and_classificationMIL-C-5541 CL 3 MIL SPEC SINGLE TREATMENT RESPONSE
NSN5340-01-357-1084
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 660548 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: 3.750 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-C-5541 CL 3 MIL SPEC SINGLE TREATMENT RESPONSE
•
FIRST RECESS INSIDE HEIGHT: 1.530 INCHES NOMINAL IN
•
HOLE QUANTITY ALONG LENGTH: 4
•
MOUNTING OPENING SHAPE STYLE: UNTHREADED HOLE
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-250/8 H32 FED SPEC SINGLE MATERIAL RESPONSE
•
FEATURES PROVIDED: SPECIAL MARKING
•
SECURING DEVICE TYPE: SPECIAL
TECHNICAL CHARACTERISTICS
LENGTH3.750 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-5541 CL 3 MIL SPEC SINGLE TREATMENT RESPONSE
FIRST RECESS INSIDE HEIGHT1.530 INCHES NOMINAL IN
HOLE QUANTITY ALONG LENGTH4
MOUNTING OPENING SHAPE STYLEUNTHREADED HOLE
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-250/8 H32 FED SPEC SINGLE MATERIAL RESPONSE
FEATURES PROVIDEDSPECIAL MARKING
SECURING DEVICE TYPESPECIAL
SURFACE TREATMENTCHROMATE
WIDTH2.500 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 660548?
660548 is a COVER,ACCESS.
What is the NSN for 660548?
660548 is cataloged in the U.S. Government catalog under NSN 5340-01-357-1084. 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.