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53-87404-1 — COVER,ACCESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

53-87404-1: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include width: 0.950 INCHES NOMINAL IN, length: 3.480 INCHES NOMINAL IN, material: ALUMINUM ALLOY 2024, hole_diameter: 0.125 INCHES NOMINAL IN, peripheral_shape_style: OVAL, MULTI HOLES, mounting_opening_shape_style: UNTHREADED HOLE. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-071-3970, 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
53-87404-1
NSN: 5340-00-071-3970
FSC: 5340 — Hardware, Commercial
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
width0.950 INCHES NOMINAL IN
length3.480 INCHES NOMINAL IN
materialALUMINUM ALLOY 2024
hole_diameter0.125 INCHES NOMINAL IN
peripheral_shape_styleOVAL, MULTI HOLES
hole_quantity_along_length2
mounting_opening_shape_styleUNTHREADED HOLE
distance_between_holes_along_length3.000 INCHES NOMINAL IN
material_document_and_classificationQQ-A-250/4,T3 FED SPEC SINGLE MATERIAL RESPONSE
distance_from_first_hole_centerline_to_end_along_length0.240 INCHES NOMINAL IN
NSN5340-00-071-3970
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 53-87404-1 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: 3.480 INCHES NOMINAL IN
•
DISTANCE BETWEEN HOLES ALONG LENGTH: 3.000 INCHES NOMINAL IN
•
HOLE QUANTITY ALONG LENGTH: 2
•
MOUNTING OPENING SHAPE STYLE: UNTHREADED HOLE
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-250/4,T3 FED SPEC SINGLE MATERIAL RESPONSE
•
DISTANCE FROM FIRST HOLE CENTERLINE TO END ALONG LENGTH: 0.240 INCHES NOMINAL IN
•
PERIPHERAL SHAPE STYLE: OVAL, MULTI HOLES
•
WIDTH: 0.950 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
LENGTH3.480 INCHES NOMINAL IN
DISTANCE BETWEEN HOLES ALONG LENGTH3.000 INCHES NOMINAL IN
HOLE QUANTITY ALONG LENGTH2
MOUNTING OPENING SHAPE STYLEUNTHREADED HOLE
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-250/4,T3 FED SPEC SINGLE MATERIAL RESPONSE
DISTANCE FROM FIRST HOLE CENTERLINE TO END ALONG LENGTH0.240 INCHES NOMINAL IN
PERIPHERAL SHAPE STYLEOVAL, MULTI HOLES
WIDTH0.950 INCHES NOMINAL IN
MATERIALALUMINUM ALLOY 2024
HOLE DIAMETER0.125 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 53-87404-1?
53-87404-1 is a COVER,ACCESS.
What is the NSN for 53-87404-1?
53-87404-1 is cataloged in the U.S. Government catalog under NSN 5340-00-071-3970. 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.