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7021-90-212-2112 — PLATE,MOUNTING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

7021-90-212-2112: PLATE,MOUNTING.

The PLATE,MOUNTING is a the manufacturer industrial component. Key specifications include shape: RECTANGULAR W/ROUNDED CORNERS, width: 2.925 INCHES MINIMUM AND 2.925 INCHES MINIMUM AND 2.945 INCHES MAXIMUM2.945 INCHES MAXIMUM IN, length: 2.125 INCHES MINIMUM AND 2.125 INCHES MINIMUM AND 2.145 INCHES MAXIMUM2.145 INCHES MAXIMUM IN, material: STEEL COMP 4130, thickness: 0.031 INCHES NOMINAL0.031 INCHES NOMINAL IN, corner_radius: 0.120 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-524-5182, 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
7021-90-212-2112
NSN: 5340-01-524-5182
FSC: 5340 — Hardware, Commercial
CAGE: 78286 — SIKORSKY AIRCRAFT CORPORATION DBA SIKORSKY AIRCRAFT CORP (USA)
SPECIFICATIONS
shapeRECTANGULAR W/ROUNDED CORNERS
width2.925 INCHES MINIMUM AND 2.925 INCHES MINIMUM AND 2.945 INCHES MAXIMUM2.945 INCHES MAXIMUM IN
length2.125 INCHES MINIMUM AND 2.125 INCHES MINIMUM AND 2.145 INCHES MAXIMUM2.145 INCHES MAXIMUM IN
materialSTEEL COMP 4130
thickness0.031 INCHES NOMINAL0.031 INCHES NOMINAL IN
corner_radius0.120 INCHES NOMINAL IN
mounting_hole_typeUNTHREADED
mounting_hole_diameter0.382 INCHES MINIMUM AND 0.402 INCHES MAXIMUM ALL HOLES IN
mounting_hole_quantity4
end_item_identificationBIFILAR
material_document_and_classificationMIL-S-18729 MIL SPEC SINGLE MATERIAL RESPONSE
NSN5340-01-524-5182
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 7021-90-212-2112 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: 4
•
CORNER RADIUS: 0.120 INCHES NOMINAL IN
•
LENGTH: 2.125 INCHES MINIMUM AND 2.125 INCHES MINIMUM AND 2.145 INCHES MAXIMUM2.145 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-18729 MIL SPEC SINGLE MATERIAL RESPONSE
•
MOUNTING HOLE DIAMETER: 0.382 INCHES MINIMUM AND 0.402 INCHES MAXIMUM ALL HOLES IN
•
SHAPE: RECTANGULAR W/ROUNDED CORNERS
•
WIDTH: 2.925 INCHES MINIMUM AND 2.925 INCHES MINIMUM AND 2.945 INCHES MAXIMUM2.945 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
MOUNTING HOLE QUANTITY4
CORNER RADIUS0.120 INCHES NOMINAL IN
LENGTH2.125 INCHES MINIMUM AND 2.125 INCHES MINIMUM AND 2.145 INCHES MAXIMUM2.145 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-18729 MIL SPEC SINGLE MATERIAL RESPONSE
MOUNTING HOLE DIAMETER0.382 INCHES MINIMUM AND 0.402 INCHES MAXIMUM ALL HOLES IN
SHAPERECTANGULAR W/ROUNDED CORNERS
SPECIAL FEATURESDATA EXPORT RESTRICTED; MOUNTING CONFIGURATION: 4 HOLES IN RECTANGULAR PATTERN, 1.000 INCH BETWEEN HOLE CENTERS LENGTHWISE, 2.000 INCHES BETWEEN HOLE CENTERS WIDTHWISE. HOLE CENTER 0.468 IN FROM LENGTH EDGE, AND 0.668 IN FROM WIDTH EDGE. IN
WIDTH2.925 INCHES MINIMUM AND 2.925 INCHES MINIMUM AND 2.945 INCHES MAXIMUM2.945 INCHES MAXIMUM IN
END ITEM IDENTIFICATIONBIFILAR
MATERIALSTEEL COMP 4130
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 — mutilation
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FREQUENTLY ASKED QUESTIONS
What is 7021-90-212-2112?
7021-90-212-2112 is a PLATE,MOUNTING.
What is the NSN for 7021-90-212-2112?
7021-90-212-2112 is cataloged in the U.S. Government catalog under NSN 5340-01-524-5182. 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.