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56C25 — COVER,ACCESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

56C25: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING, hole_diameter: 0.147 INCHES NOMINAL IN, body_thickness: 0.126 INCHES NOMINAL IN, outside_diameter: 1.100 INCHES NOMINAL IN, features_provided: OBSERVATION FACILITY, securing_device_type: THREADED FASTENER. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-787-3331, 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
56C25
NSN: 5340-00-787-3331
FSC: 5340 — Hardware, Commercial
CAGE: 72914 — GRIMES AEROSPACE COMPANY (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING
hole_diameter0.147 INCHES NOMINAL IN
body_thickness0.126 INCHES NOMINAL IN
outside_diameter1.100 INCHES NOMINAL IN
features_providedOBSERVATION FACILITY
securing_device_typeTHREADED FASTENER
peripheral_shape_styleROUND, MULTI HOLES
hole_quantity_along_length3
cross-sectional_shape_styleFLAT
mounting_opening_shape_styleUNTHREADED HOLE
distance_between_hole_centers0.750 INCHES NOMINAL IN
bolt_hole_centerline_to_nearest_edge_distance0.102 INCHES NOMINAL IN
NSN5340-00-787-3331
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 56C25 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
•
HOLE QUANTITY ALONG LENGTH: 3
•
DISTANCE BETWEEN HOLE CENTERS: 0.750 INCHES NOMINAL IN
•
MOUNTING OPENING SHAPE STYLE: UNTHREADED HOLE
•
CROSS-SECTIONAL SHAPE STYLE: FLAT
•
OUTSIDE DIAMETER: 1.100 INCHES NOMINAL IN
•
BOLT HOLE CENTERLINE TO NEAREST EDGE DISTANCE: 0.102 INCHES NOMINAL IN
•
FEATURES PROVIDED: OBSERVATION FACILITY
•
SECURING DEVICE TYPE: THREADED FASTENER
TECHNICAL CHARACTERISTICS
HOLE QUANTITY ALONG LENGTH3
DISTANCE BETWEEN HOLE CENTERS0.750 INCHES NOMINAL IN
MOUNTING OPENING SHAPE STYLEUNTHREADED HOLE
CROSS-SECTIONAL SHAPE STYLEFLAT
OUTSIDE DIAMETER1.100 INCHES NOMINAL IN
BOLT HOLE CENTERLINE TO NEAREST EDGE DISTANCE0.102 INCHES NOMINAL IN
FEATURES PROVIDEDOBSERVATION FACILITY
SECURING DEVICE TYPETHREADED FASTENER
PERIPHERAL SHAPE STYLEROUND, MULTI HOLES
MATERIALSTEEL CORROSION RESISTING
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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 56C25?
56C25 is a COVER,ACCESS.
What is the NSN for 56C25?
56C25 is cataloged in the U.S. Government catalog under NSN 5340-00-787-3331. 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.