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211041991 — COVER,ACCESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

211041991: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 6061, body_thickness: 0.500 INCHES NOMINAL IN, outside_diameter: 23.500 INCHES NOMINAL IN, special_features: 0.719 IN. CENTRALLY LOCATED HOLES; COVER, IN-PORT IN, bolt_circle_diameter: 22.000 INCHES NOMINAL IN, peripheral_shape_style: ROUND, MULTI HOLES.

This part is cataloged in the U.S. Government catalog under NSN 5340-01-377-7274, 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
211041991
NSN: 5340-01-377-7274
FSC: 5340 — Hardware, Commercial
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 6061
body_thickness0.500 INCHES NOMINAL IN
outside_diameter23.500 INCHES NOMINAL IN
special_features0.719 IN. CENTRALLY LOCATED HOLES; COVER, IN-PORT IN
bolt_circle_diameter22.000 INCHES NOMINAL IN
peripheral_shape_styleROUND, MULTI HOLES
bolt_circle_hole_quantity8
cross-sectional_shape_styleFLAT
material_document_and_classificationQQ-A-250/11 FED SPEC SINGLE MATERIAL RESPONSE
NSN5340-01-377-7274
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 211041991 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
•
BOLT CIRCLE HOLE QUANTITY: 8
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-250/11 FED SPEC SINGLE MATERIAL RESPONSE
•
CROSS-SECTIONAL SHAPE STYLE: FLAT
•
OUTSIDE DIAMETER: 23.500 INCHES NOMINAL IN
•
BOLT CIRCLE DIAMETER: 22.000 INCHES NOMINAL IN
•
PERIPHERAL SHAPE STYLE: ROUND, MULTI HOLES
•
MATERIAL: ALUMINUM ALLOY 6061
TECHNICAL CHARACTERISTICS
BOLT CIRCLE HOLE QUANTITY8
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-250/11 FED SPEC SINGLE MATERIAL RESPONSE
CROSS-SECTIONAL SHAPE STYLEFLAT
OUTSIDE DIAMETER23.500 INCHES NOMINAL IN
BOLT CIRCLE DIAMETER22.000 INCHES NOMINAL IN
SPECIAL FEATURES0.719 IN. CENTRALLY LOCATED HOLES; COVER, IN-PORT IN
PERIPHERAL SHAPE STYLEROUND, MULTI HOLES
MATERIALALUMINUM ALLOY 6061
BODY THICKNESS0.500 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 2
DF6002-413 FN-47Reference document
Same NSN cross-reference
Reference document — Secondary reference
563-6404328 FIND 47Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 211041991?
211041991 is a COVER,ACCESS.
What parts can replace 211041991?
There are 2 known substitutes for 211041991: DF6002-413 FN-47, 563-6404328 FIND 47. Substitute compatibility should be verified for your specific system.
What is the NSN for 211041991?
211041991 is cataloged in the U.S. Government catalog under NSN 5340-01-377-7274. 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.