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12900639 — PLATE,MOUNTING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

12900639: PLATE,MOUNTING.

The PLATE,MOUNTING is a the manufacturer industrial component. Key specifications include shape: RECTANGULAR, width: 4.075 INCHES NOMINAL4.075 INCHES NOMINAL IN, length: 7.000 INCHES NOMINAL7.000 INCHES NOMINAL IN, material: ALUMINUM ALLOY, thickness: 0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN, mounting_hole_type: UNTHREADED. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-466-7205, 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
12900639
NSN: 5340-01-466-7205
FSC: 5340 — Hardware, Commercial
CAGE: 19200 — COMBAT CAPABILITIES DEVELOPMENT COMMAND (CCDC) ARMAMENTS CENTER DBA CCDC DIV LOGISTICS RESEARCH AND ENGINEERING DIRECTORATE (USA)
SPECIFICATIONS
shapeRECTANGULAR
width4.075 INCHES NOMINAL4.075 INCHES NOMINAL IN
length7.000 INCHES NOMINAL7.000 INCHES NOMINAL IN
materialALUMINUM ALLOY
thickness0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN
mounting_hole_typeUNTHREADED
mounting_hole_diameter0.136 INCHES NOMINAL FIRST HOLE IN
mounting_hole_quantity19
end_item_identificationARMORED RECONNAISSANCE-AIRBORNE ASSA
NSN5340-01-466-7205
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 12900639 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
•
MOUNTING HOLE QUANTITY: 19
•
LENGTH: 7.000 INCHES NOMINAL7.000 INCHES NOMINAL IN
•
MOUNTING HOLE DIAMETER: 0.136 INCHES NOMINAL FIRST HOLE IN
•
SHAPE: RECTANGULAR
•
WIDTH: 4.075 INCHES NOMINAL4.075 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
MOUNTING HOLE QUANTITY19
LENGTH7.000 INCHES NOMINAL7.000 INCHES NOMINAL IN
MOUNTING HOLE DIAMETER0.136 INCHES NOMINAL FIRST HOLE IN
MOUNTING HOLE DIAMETER0.122 INCHES NOMINAL THIRD HOLE IN
MOUNTING HOLE DIAMETER0.138 INCHES NOMINAL FOURTH HOLE IN
MOUNTING HOLE DIAMETER0.164 INCHES NOMINAL SECOND HOLE IN
SHAPERECTANGULAR
WIDTH4.075 INCHES NOMINAL4.075 INCHES NOMINAL IN
END ITEM IDENTIFICATIONARMORED RECONNAISSANCE-AIRBORNE ASSA
MATERIALALUMINUM ALLOY
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 12900639?
12900639 is a PLATE,MOUNTING.
What is the NSN for 12900639?
12900639 is cataloged in the U.S. Government catalog under NSN 5340-01-466-7205. This indicates validated use in U.S. government and defense supply chains.
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