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3975-020 — COVER,ACCESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

3975-020: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING, hole_diameter: 0.166 INCHES MINIMUM AND 0.181 INCHES MAXIMUM IN, securing_device_type: SPECIAL, peripheral_shape_style: RECTANGLE, MULTI HOLES, end_item_identification: MAIN FUEL CONTROL,P/N 8062-469,FOR F108 ACFT ENG, mounting_opening_shape_style: UNTHREADED HOLE. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-206-5565, 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
3975-020
NSN: 5340-01-206-5565
FSC: 5340 — Hardware, Commercial
CAGE: 66503 — WOODWARD, INC. DIV FUEL SYSTEMS AND CONTROLS (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING
hole_diameter0.166 INCHES MINIMUM AND 0.181 INCHES MAXIMUM IN
securing_device_typeSPECIAL
peripheral_shape_styleRECTANGLE, MULTI HOLES
end_item_identificationMAIN FUEL CONTROL,P/N 8062-469,FOR F108 ACFT ENG
hole_quantity_along_width2
hole_quantity_along_length1
mounting_opening_shape_styleUNTHREADED HOLE
distance_between_holes_along_width1.844 INCHES NOMINAL IN
distance_between_holes_along_length1.728 INCHES NOMINAL AND 1.734 INCHES NOMINAL IN
material_document_and_classificationAMS5516 ASSN STD SINGLE MATERIAL RESPONSE
distance_from_first_hole_centerline_to_end_along_width0.188 INCHES NOMINAL IN
NSN5340-01-206-5565
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 3975-020 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: 0.188 INCHES NOMINAL IN
•
DISTANCE BETWEEN HOLES ALONG LENGTH: 1.728 INCHES NOMINAL AND 1.734 INCHES NOMINAL IN
•
HOLE QUANTITY ALONG LENGTH: 1
•
DISTANCE BETWEEN HOLES ALONG WIDTH: 1.844 INCHES NOMINAL IN
•
MOUNTING OPENING SHAPE STYLE: UNTHREADED HOLE
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS5516 ASSN STD SINGLE MATERIAL RESPONSE
•
SECURING DEVICE TYPE: SPECIAL
•
HOLE QUANTITY ALONG WIDTH: 2
TECHNICAL CHARACTERISTICS
DISTANCE FROM FIRST HOLE CENTERLINE TO END ALONG WIDTH0.188 INCHES NOMINAL IN
DISTANCE BETWEEN HOLES ALONG LENGTH1.728 INCHES NOMINAL AND 1.734 INCHES NOMINAL IN
HOLE QUANTITY ALONG LENGTH1
DISTANCE BETWEEN HOLES ALONG WIDTH1.844 INCHES NOMINAL IN
MOUNTING OPENING SHAPE STYLEUNTHREADED HOLE
MATERIAL DOCUMENT AND CLASSIFICATIONAMS5516 ASSN STD SINGLE MATERIAL RESPONSE
SECURING DEVICE TYPESPECIAL
HOLE QUANTITY ALONG WIDTH2
DISTANCE FROM FIRST HOLE CENTERLINE TO END ALONG LENGTH0.125 INCHES NOMINAL IN
PERIPHERAL SHAPE STYLERECTANGLE, 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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)Demilitarization required — critical (Q)
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FREQUENTLY ASKED QUESTIONS
What is 3975-020?
3975-020 is a COVER,ACCESS.
What is the NSN for 3975-020?
3975-020 is cataloged in the U.S. Government catalog under NSN 5340-01-206-5565. 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.