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220812A — SEAT,HELICAL COMPRESSION SPRING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

220812A: SEAT,HELICAL COMPRESSION SPRING.

SEAT,HELICAL COMPRESSION SPRING. Key specifications include material: STEEL COMP 1213, design_type: SPLIT, end_diameter: 0.6410 INCHES MINIMUM AND 0.6460 INCHES MAXIMUM IN, bore_diameter: 0.3590 INCHES NOMINAL IN, overall_height: 0.4930 INCHES NOMINAL IN, style_designator: SEAT. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-391-3320, 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
220812A
NSN: 5340-00-391-3320
FSC: 5340 — Hardware, Commercial
CAGE: 1ML14 — BRINKLEY TECHNOLOGY GROUP LLC DBA HERCULES MANUFACTURING (USA)
SPECIFICATIONS
materialSTEEL COMP 1213
design_typeSPLIT
end_diameter0.6410 INCHES MINIMUM AND 0.6460 INCHES MAXIMUM IN
bore_diameter0.3590 INCHES NOMINAL IN
overall_height0.4930 INCHES NOMINAL IN
style_designatorSEAT
features_providedCASEHARDENED
first_step_diameter0.8750 INCHES NOMINAL IN
countersink_diameter0.5940 INCHES NOMINAL IN
countersink_angle_in_deg45.0
distance_from_end_to_first_step0.3930 INCHES NOMINAL IN
material_document_and_classificationSAE 1113 ASSN STD SINGLE MATERIAL RESPONSE
NSN5340-00-391-3320
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 220812A 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
•
COUNTERSINK ANGLE IN DEG: 45.0
•
FIRST STEP DIAMETER: 0.8750 INCHES NOMINAL IN
•
END DIAMETER: 0.6410 INCHES MINIMUM AND 0.6460 INCHES MAXIMUM IN
•
COUNTERSINK DIAMETER: 0.5940 INCHES NOMINAL IN
•
DISTANCE FROM END TO FIRST STEP: 0.3930 INCHES NOMINAL IN
•
DESIGN TYPE: SPLIT
•
STYLE DESIGNATOR: SEAT
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.4930 INCHES NOMINAL IN
COUNTERSINK ANGLE IN DEG45.0
FIRST STEP DIAMETER0.8750 INCHES NOMINAL IN
END DIAMETER0.6410 INCHES MINIMUM AND 0.6460 INCHES MAXIMUM IN
COUNTERSINK DIAMETER0.5940 INCHES NOMINAL IN
DISTANCE FROM END TO FIRST STEP0.3930 INCHES NOMINAL IN
DESIGN TYPESPLIT
STYLE DESIGNATORSEAT
MATERIAL DOCUMENT AND CLASSIFICATIONSAE 1113 ASSN STD SINGLE MATERIAL RESPONSE
FEATURES PROVIDEDCASEHARDENED
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 3
AB0070864430Reference document
Same NSN cross-reference
Reference document — Secondary reference
07-864430Reference document
Same NSN cross-reference
Reference document — Secondary reference
864430Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 220812A?
220812A is a SEAT,HELICAL COMPRESSION SPRING.
What parts can replace 220812A?
There are 3 known substitutes for 220812A: AB0070864430, 07-864430, 864430. Substitute compatibility should be verified for your specific system.
What is the NSN for 220812A?
220812A is cataloged in the U.S. Government catalog under NSN 5340-00-391-3320. 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.