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H621-0102-12 — PLATE,MOUNTING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

H621-0102-12: PLATE,MOUNTING.

The PLATE,MOUNTING is a the manufacturer industrial component. Key specifications include shape: ROUND, material: STEEL COMP 304, thickness: 0.375 INCHES NOMINAL IN, outside_diameter: 3.750 INCHES NOMINAL IN, material_document_and_classification: AISI 304 ASSN STD SINGLE MATERIAL RESPONSE, part_name_assigned_by_controlling_agency: LOCKING DEVICE PISTON. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-490-4476, 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
H621-0102-12
NSN: 5340-01-490-4476
FSC: 5340 — Hardware, Commercial
CAGE: 96169 — ELECTRIC BOAT CORPORATION DIV GENERAL DYNAMICS ELECTRIC BOAT (USA)
SPECIFICATIONS
shapeROUND
materialSTEEL COMP 304
thickness0.375 INCHES NOMINAL IN
outside_diameter3.750 INCHES NOMINAL IN
mounting_hole_quantity4
material_document_and_classificationAISI 304 ASSN STD SINGLE MATERIAL RESPONSE
part_name_assigned_by_controlling_agencyLOCKING DEVICE PISTON
NSN5340-01-490-4476
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: H621-0102-12 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
•
MATERIAL DOCUMENT AND CLASSIFICATION: AISI 304 ASSN STD SINGLE MATERIAL RESPONSE
•
SHAPE: ROUND
•
OUTSIDE DIAMETER: 3.750 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 304
•
THICKNESS: 0.375 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
MOUNTING HOLE QUANTITY4
MATERIAL DOCUMENT AND CLASSIFICATIONAISI 304 ASSN STD SINGLE MATERIAL RESPONSE
SHAPEROUND
OUTSIDE DIAMETER3.750 INCHES NOMINAL IN
PART NAME ASSIGNED BY CONTROLLING AGENCYLOCKING DEVICE PISTON
MATERIALSTEEL COMP 304
THICKNESS0.375 INCHES NOMINAL IN
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 H621-0102-12?
H621-0102-12 is a PLATE,MOUNTING.
What is the NSN for H621-0102-12?
H621-0102-12 is cataloged in the U.S. Government catalog under NSN 5340-01-490-4476. 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.