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160D611521-21 — COVER,ACCESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

160D611521-21: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 7075, hole_diameter: 0.190 INCHES MINIMUM AND 0.194 INCHES MAXIMUM IN, body_thickness: 0.063 INCHES NOMINAL IN, flange_thickness: 0.063 INCHES NOMINAL IN, outside_diameter: 5.312 INCHES NOMINAL IN, inside_corner_radius: 3.000 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-021-5596, 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
160D611521-21
NSN: 5340-01-021-5596
FSC: 5340 — Hardware, Commercial
CAGE: 79RG9 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 7075
hole_diameter0.190 INCHES MINIMUM AND 0.194 INCHES MAXIMUM IN
body_thickness0.063 INCHES NOMINAL IN
flange_thickness0.063 INCHES NOMINAL IN
outside_diameter5.312 INCHES NOMINAL IN
inside_corner_radius3.000 INCHES NOMINAL IN
securing_device_typeTHREADED FASTENER
peripheral_shape_styleROUND, MULTI HOLES
bolt_circle_hole_quantity9
first_recess_inside_height0.750 INCHES NOMINAL IN
cross-sectional_shape_styleSPHERICAL RECESS
mounting_opening_shape_styleUNTHREADED HOLE
NSN5340-01-021-5596
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 160D611521-21 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
•
FLANGE THICKNESS: 0.063 INCHES NOMINAL IN
•
BOLT CIRCLE HOLE QUANTITY: 9
•
INSIDE CORNER RADIUS: 3.000 INCHES NOMINAL IN
•
FIRST RECESS INSIDE HEIGHT: 0.750 INCHES NOMINAL IN
•
MOUNTING OPENING SHAPE STYLE: UNTHREADED HOLE
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-250/13,O FED SPEC SINGLE MATERIAL RESPONSE
•
CROSS-SECTIONAL SHAPE STYLE: SPHERICAL RECESS
•
OUTSIDE DIAMETER: 5.312 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
FLANGE THICKNESS0.063 INCHES NOMINAL IN
BOLT CIRCLE HOLE QUANTITY9
INSIDE CORNER RADIUS3.000 INCHES NOMINAL IN
FIRST RECESS INSIDE HEIGHT0.750 INCHES NOMINAL IN
MOUNTING OPENING SHAPE STYLEUNTHREADED HOLE
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-250/13,O FED SPEC SINGLE MATERIAL RESPONSE
CROSS-SECTIONAL SHAPE STYLESPHERICAL RECESS
OUTSIDE DIAMETER5.312 INCHES NOMINAL IN
SECURING DEVICE TYPETHREADED FASTENER
PERIPHERAL SHAPE STYLEROUND, MULTI 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 1
160E611521-21Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandDemilitarization required — mutilation + specific procedure
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FREQUENTLY ASKED QUESTIONS
What is 160D611521-21?
160D611521-21 is a COVER,ACCESS.
What parts can replace 160D611521-21?
There is 1 known substitute for 160D611521-21: 160E611521-21. Substitute compatibility should be verified for your specific system.
What is the NSN for 160D611521-21?
160D611521-21 is cataloged in the U.S. Government catalog under NSN 5340-01-021-5596. 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.