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12275509 — COVER,ACCESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

12275509: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include width: 12.750 INCHES NOMINAL IN, length: 18.120 INCHES NOMINAL IN, material: STEEL COMP 1008 OR STEEL COMP 1009 OR STEEL COMP 1015 OR STEEL COMP 1018 OR STEEL COMP 1020, hole_diameter: 0.499 INCHES MINIMUM AND 0.506 INCHES MAXIMUM IN, body_thickness: 0.750 INCHES NOMINAL IN, special_features: 0.202 IN. DIA MIN,0.208 IN.

DIA MAX HOLE,10 PLACES,0.374 IN. DIA MIN,0.381 IN. DIA MAX HOLE 1 PLACE IN.

This part is cataloged in the U.S. Government catalog under NSN 5340-01-182-4288, 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
12275509
NSN: 5340-01-182-4288
FSC: 5340 — Hardware, Commercial
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
width12.750 INCHES NOMINAL IN
length18.120 INCHES NOMINAL IN
materialSTEEL COMP 1008 OR STEEL COMP 1009 OR STEEL COMP 1015 OR STEEL COMP 1018 OR STEEL COMP 1020
hole_diameter0.499 INCHES MINIMUM AND 0.506 INCHES MAXIMUM IN
body_thickness0.750 INCHES NOMINAL IN
special_features0.202 IN. DIA MIN,0.208 IN. DIA MAX HOLE,10 PLACES,0.374 IN. DIA MIN,0.381 IN. DIA MAX HOLE 1 PLACE IN
surface_treatmentPAINT POLYURETHANE
mounting_opening_shape_styleUNTHREADED HOLE
material_document_and_classificationASTM A568 ASSN STD SINGLE MATERIAL RESPONSE
surface_treatment_document_and_classificationMIL-C-46168 MIL SPEC SINGLE TREATMENT RESPONSE
distance_from_first_hole_centerline_to_end_along_width1.000 INCHES NOMINAL IN
distance_from_first_hole_centerline_to_end_along_length1.000 INCHES NOMINAL IN
NSN5340-01-182-4288
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 12275509 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: 1.000 INCHES NOMINAL IN
•
LENGTH: 18.120 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-C-46168 MIL SPEC SINGLE TREATMENT RESPONSE
•
MOUNTING OPENING SHAPE STYLE: UNTHREADED HOLE
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A568 ASSN STD SINGLE MATERIAL RESPONSE
•
DISTANCE FROM FIRST HOLE CENTERLINE TO END ALONG LENGTH: 1.000 INCHES NOMINAL IN
•
SURFACE TREATMENT: PAINT POLYURETHANE
TECHNICAL CHARACTERISTICS
DISTANCE FROM FIRST HOLE CENTERLINE TO END ALONG WIDTH1.000 INCHES NOMINAL IN
LENGTH18.120 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-46168 MIL SPEC SINGLE TREATMENT RESPONSE
MOUNTING OPENING SHAPE STYLEUNTHREADED HOLE
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A568 ASSN STD SINGLE MATERIAL RESPONSE
DISTANCE FROM FIRST HOLE CENTERLINE TO END ALONG LENGTH1.000 INCHES NOMINAL IN
SPECIAL FEATURES0.202 IN. DIA MIN,0.208 IN. DIA MAX HOLE,10 PLACES,0.374 IN. DIA MIN,0.381 IN. DIA MAX HOLE 1 PLACE IN
SURFACE TREATMENTPAINT POLYURETHANE
WIDTH12.750 INCHES NOMINAL IN
MATERIALSTEEL COMP 1008 OR STEEL COMP 1009 OR STEEL COMP 1015 OR STEEL COMP 1018 OR STEEL COMP 1020
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: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 12275509?
12275509 is a COVER,ACCESS.
What is the NSN for 12275509?
12275509 is cataloged in the U.S. Government catalog under NSN 5340-01-182-4288. 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.