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12578379 — PLATE,MOUNTING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

12578379: PLATE,MOUNTING.

The PLATE,MOUNTING is a the manufacturer industrial component. Key specifications include shape: RECTANGULAR, width: 1.720 INCHES MINIMUM AND 1.720 INCHES MINIMUM AND 1.780 INCHES MAXIMUM1.780 INCHES MAXIMUM IN, length: 2.720 INCHES MINIMUM AND 2.720 INCHES MINIMUM AND 2.780 INCHES MAXIMUM2.780 INCHES MAXIMUM IN, material: ALUMINUM ALLOY 5083 OR ALUMINUM ALLOY 5086 OR ALUMINUM ALLOY 5059 OR ALUMINUM ALLOY 6061, thickness: 0.365 INCHES MINIMUM AND 0.365 INCHES MINIMUM AND 0.395 INCHES MAXIMUM0.395 INCHES MAXIMUM IN, special_features: PROTECTIVE FINISH PER 19207-12577737 PARAGRAPH 3.4. CENTER-TO-CENTER DISTANCE BETWEEN MOUNTING HOLES IS 1.750 INCHES.

IN. This part is cataloged in the U.S. Government catalog under NSN 5340-01-644-3246, 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
12578379
NSN: 5340-01-644-3246
FSC: 5340 — Hardware, Commercial
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
shapeRECTANGULAR
width1.720 INCHES MINIMUM AND 1.720 INCHES MINIMUM AND 1.780 INCHES MAXIMUM1.780 INCHES MAXIMUM IN
length2.720 INCHES MINIMUM AND 2.720 INCHES MINIMUM AND 2.780 INCHES MAXIMUM2.780 INCHES MAXIMUM IN
materialALUMINUM ALLOY 5083 OR ALUMINUM ALLOY 5086 OR ALUMINUM ALLOY 5059 OR ALUMINUM ALLOY 6061
thickness0.365 INCHES MINIMUM AND 0.365 INCHES MINIMUM AND 0.395 INCHES MAXIMUM0.395 INCHES MAXIMUM IN
special_featuresPROTECTIVE FINISH PER 19207-12577737 PARAGRAPH 3.4. CENTER-TO-CENTER DISTANCE BETWEEN MOUNTING HOLES IS 1.750 INCHES. IN
color_chip_number17925
mounting_hole_typeTHRU HOLE
mounting_hole_diameter0.391 INCHES MINIMUM AND 0.421 INCHES MAXIMUM ALL HOLES IN
mounting_hole_quantity2
end_item_identification2350-01-575-0951
part_name_assigned_by_controlling_agencySHIM
NSN5340-01-644-3246
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 12578379 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: 2
•
LENGTH: 2.720 INCHES MINIMUM AND 2.720 INCHES MINIMUM AND 2.780 INCHES MAXIMUM2.780 INCHES MAXIMUM IN
•
COLOR CHIP NUMBER: 17925
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM B209 ASSN STD 1ST MATERIAL RESPONSE OR ASTM B209 ASSN STD 2ND MATERIAL RESPONSE OR ASTM B209 ASSN STD 3RD MATERIAL RESPONSE OR ASTM B209 ASSN STD 4TH MATERIAL RESPONSE OR ASTM B221 ASSN STD 5TH MATERIAL RESPONSE
•
MOUNTING HOLE DIAMETER: 0.391 INCHES MINIMUM AND 0.421 INCHES MAXIMUM ALL HOLES IN
•
SHAPE: RECTANGULAR
•
COLOR: WHITE
TECHNICAL CHARACTERISTICS
MOUNTING HOLE QUANTITY2
LENGTH2.720 INCHES MINIMUM AND 2.720 INCHES MINIMUM AND 2.780 INCHES MAXIMUM2.780 INCHES MAXIMUM IN
COLOR CHIP NUMBER17925
MATERIAL DOCUMENT AND CLASSIFICATIONASTM B209 ASSN STD 1ST MATERIAL RESPONSE OR ASTM B209 ASSN STD 2ND MATERIAL RESPONSE OR ASTM B209 ASSN STD 3RD MATERIAL RESPONSE OR ASTM B209 ASSN STD 4TH MATERIAL RESPONSE OR ASTM B221 ASSN STD 5TH MATERIAL RESPONSE
MOUNTING HOLE DIAMETER0.391 INCHES MINIMUM AND 0.421 INCHES MAXIMUM ALL HOLES IN
SHAPERECTANGULAR
COLORWHITE
SPECIAL FEATURESPROTECTIVE FINISH PER 19207-12577737 PARAGRAPH 3.4. CENTER-TO-CENTER DISTANCE BETWEEN MOUNTING HOLES IS 1.750 INCHES. IN
WIDTH1.720 INCHES MINIMUM AND 1.720 INCHES MINIMUM AND 1.780 INCHES MAXIMUM1.780 INCHES MAXIMUM IN
PART NAME ASSIGNED BY CONTROLLING AGENCYSHIM
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 12578379?
12578379 is a PLATE,MOUNTING.
What is the NSN for 12578379?
12578379 is cataloged in the U.S. Government catalog under NSN 5340-01-644-3246. 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.