PartsTable
Technical Data Sheet
Download PDF

C31A3028-3 — COVER,ACCESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

C31A3028-3: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include width: 3.720 INCHES MINIMUM AND 3.750 INCHES MAXIMUM IN, length: 5.730 INCHES MINIMUM AND 5.750 INCHES MAXIMUM IN, material: ALUMINUM ALLOY 6061, hole_diameter: 0.257 INCHES MINIMUM AND 0.259 INCHES MAXIMUM IN, body_thickness: 0.061 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN, securing_device_type: TURNLOCK FASTENER. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-178-0252, 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
C31A3028-3
NSN: 5340-01-178-0252
FSC: 5340 — Hardware, Commercial
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
width3.720 INCHES MINIMUM AND 3.750 INCHES MAXIMUM IN
length5.730 INCHES MINIMUM AND 5.750 INCHES MAXIMUM IN
materialALUMINUM ALLOY 6061
hole_diameter0.257 INCHES MINIMUM AND 0.259 INCHES MAXIMUM IN
body_thickness0.061 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN
special_featuresCENTER HOLE 2.625 IN. DIA,WITH 4 EQUALLY SPACED HOLES ON EDGE OF CENTER HOLE 0.113-0.119 IN. DIA; 4 TURNLOCK STUDS INCLUDED IN
securing_device_typeTURNLOCK FASTENER
peripheral_shape_styleRECTANGLE, FOUR HOLES
end_item_identificationANTENNA INDICATOR CONTROL ON AN/APQ-160
cross-sectional_shape_styleFLAT W/OPEN CENTER
mounting_opening_shape_styleUNTHREADED HOLE
distance_between_holes_along_width2.620 INCHES MINIMUM AND 2.630 INCHES MAXIMUM IN
NSN5340-01-178-0252
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: C31A3028-3 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
•
DISTANCE FROM FIRST HOLE CENTERLINE TO END ALONG WIDTH: 0.547 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
•
LENGTH: 5.730 INCHES MINIMUM AND 5.750 INCHES MAXIMUM IN
•
DISTANCE BETWEEN HOLES ALONG LENGTH: 5.360 INCHES MINIMUM AND 5.370 INCHES MAXIMUM IN
•
DISTANCE BETWEEN HOLES ALONG WIDTH: 2.620 INCHES MINIMUM AND 2.630 INCHES MAXIMUM IN
•
MOUNTING OPENING SHAPE STYLE: UNTHREADED HOLE
•
CROSS-SECTIONAL SHAPE STYLE: FLAT W/OPEN CENTER
•
SECURING DEVICE TYPE: TURNLOCK FASTENER
•
DISTANCE FROM FIRST HOLE CENTERLINE TO END ALONG LENGTH: 0.182 INCHES MINIMUM AND 0.192 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
DISTANCE FROM FIRST HOLE CENTERLINE TO END ALONG WIDTH0.547 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
LENGTH5.730 INCHES MINIMUM AND 5.750 INCHES MAXIMUM IN
DISTANCE BETWEEN HOLES ALONG LENGTH5.360 INCHES MINIMUM AND 5.370 INCHES MAXIMUM IN
DISTANCE BETWEEN HOLES ALONG WIDTH2.620 INCHES MINIMUM AND 2.630 INCHES MAXIMUM IN
MOUNTING OPENING SHAPE STYLEUNTHREADED HOLE
CROSS-SECTIONAL SHAPE STYLEFLAT W/OPEN CENTER
SECURING DEVICE TYPETURNLOCK FASTENER
DISTANCE FROM FIRST HOLE CENTERLINE TO END ALONG LENGTH0.182 INCHES MINIMUM AND 0.192 INCHES MAXIMUM IN
SPECIAL FEATURESCENTER HOLE 2.625 IN. DIA,WITH 4 EQUALLY SPACED HOLES ON EDGE OF CENTER HOLE 0.113-0.119 IN. DIA; 4 TURNLOCK STUDS INCLUDED IN
PERIPHERAL SHAPE STYLERECTANGLE, FOUR HOLES
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: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
Ready to buy C31A3028-3?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is C31A3028-3?
C31A3028-3 is a COVER,ACCESS.
What is the NSN for C31A3028-3?
C31A3028-3 is cataloged in the U.S. Government catalog under NSN 5340-01-178-0252. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — C31A3028-3

✓ 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.