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2688W270 — COVER,ACCESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

2688W270: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include width: 2.0000 INCHES NOMINAL IN, length: 3.0000 INCHES NOMINAL IN, material: ALUMINUM ALLOY 6061, body_thickness: 0.1200 INCHES NOMINAL IN, inside_diameter: 1.6500 INCHES NOMINAL IN, flange_thickness: 0.5160 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-391-1583, 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
2688W270
NSN: 5340-01-391-1583
FSC: 5340 — Hardware, Commercial
CAGE: U1605 — HONEYWELL AEROSPACE YEOVIL DIV AEROSPACE -YEOVIL (GBR)
SPECIFICATIONS
width2.0000 INCHES NOMINAL IN
length3.0000 INCHES NOMINAL IN
materialALUMINUM ALLOY 6061
body_thickness0.1200 INCHES NOMINAL IN
inside_diameter1.6500 INCHES NOMINAL IN
flange_thickness0.5160 INCHES NOMINAL IN
surface_treatmentCHROMATE
inside_corner_radius0.0630 INCHES NOMINAL IN
securing_device_typeSPECIAL
peripheral_shape_styleOVAL, TWO HOLES
first_recess_inside_height0.7800 INCHES NOMINAL IN
cross-sectional_shape_styleCIRCULAR RECESS
NSN5340-01-391-1583
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 2688W270 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: 3.0000 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-C-5541, CL 3 MIL SPEC SINGLE TREATMENT RESPONSE
•
DISTANCE BETWEEN HOLES ALONG LENGTH: 2.5000 INCHES NOMINAL IN
•
FLANGE THICKNESS: 0.5160 INCHES NOMINAL IN
•
INSIDE CORNER RADIUS: 0.0630 INCHES NOMINAL IN
•
FIRST RECESS INSIDE HEIGHT: 0.7800 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/4 FED SPEC SINGLE MATERIAL RESPONSE
•
CROSS-SECTIONAL SHAPE STYLE: CIRCULAR RECESS
TECHNICAL CHARACTERISTICS
LENGTH3.0000 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-5541, CL 3 MIL SPEC SINGLE TREATMENT RESPONSE
DISTANCE BETWEEN HOLES ALONG LENGTH2.5000 INCHES NOMINAL IN
FLANGE THICKNESS0.5160 INCHES NOMINAL IN
INSIDE CORNER RADIUS0.0630 INCHES NOMINAL IN
FIRST RECESS INSIDE HEIGHT0.7800 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/4 FED SPEC SINGLE MATERIAL RESPONSE
CROSS-SECTIONAL SHAPE STYLECIRCULAR RECESS
SECURING DEVICE TYPESPECIAL
INSIDE DIAMETER1.6500 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 2688W270?
2688W270 is a COVER,ACCESS.
What is the NSN for 2688W270?
2688W270 is cataloged in the U.S. Government catalog under NSN 5340-01-391-1583. 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.