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A83768-1 — SEAT,HELICAL COMPRESSION SPRING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

A83768-1: SEAT,HELICAL COMPRESSION SPRING.

SEAT,HELICAL COMPRESSION SPRING. Key specifications include material: STEEL COMP 630, design_type: SOLID, end_diameter: 0.4100 INCHES NOMINAL IN, bore_diameter: 0.2180 INCHES NOMINAL IN, overall_height: 1.2800 INCHES NOMINAL IN, special_features: HEAT TREAT PER EP1233 COND H1025;NEXT HIGHER ASSEBMLY A71504-3;F-15 AIRCRAFT. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-290-7563, 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
A83768-1
NSN: 5340-01-290-7563
FSC: 5340 — Hardware, Commercial
CAGE: 9P5N5 — MOOG MILITARY AIRCRAFT LLC (USA)
SPECIFICATIONS
materialSTEEL COMP 630
design_typeSOLID
end_diameter0.4100 INCHES NOMINAL IN
bore_diameter0.2180 INCHES NOMINAL IN
overall_height1.2800 INCHES NOMINAL IN
special_featuresHEAT TREAT PER EP1233 COND H1025;NEXT HIGHER ASSEBMLY A71504-3;F-15 AIRCRAFT
style_designatorSEAT
first_step_length0.0500 INCHES NOMINAL IN
surface_treatmentPASSIVATE
first_step_diameter0.7500 INCHES NOMINAL IN
second_end_diameter0.4200 INCHES NOMINAL IN
fsc_application_dataAIRCRAFT HYDRAULIC,VACUUM,DEICING SYSTEMS
NSN5340-01-290-7563
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: A83768-1 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
•
FSC APPLICATION DATA: AIRCRAFT HYDRAULIC,VACUUM,DEICING SYSTEMS
•
FIRST STEP DIAMETER: 0.7500 INCHES NOMINAL IN
•
END DIAMETER: 0.4100 INCHES NOMINAL IN
•
SECOND END DIAMETER: 0.4200 INCHES NOMINAL IN
•
DISTANCE FROM END TO FIRST STEP: 0.9700 INCHES NOMINAL IN
•
DESIGN TYPE: SOLID
•
STYLE DESIGNATOR: SEAT
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT1.2800 INCHES NOMINAL IN
FSC APPLICATION DATAAIRCRAFT HYDRAULIC,VACUUM,DEICING SYSTEMS
FIRST STEP DIAMETER0.7500 INCHES NOMINAL IN
END DIAMETER0.4100 INCHES NOMINAL IN
SECOND END DIAMETER0.4200 INCHES NOMINAL IN
DISTANCE FROM END TO FIRST STEP0.9700 INCHES NOMINAL IN
DESIGN TYPESOLID
STYLE DESIGNATORSEAT
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5643 ASSN STD SINGLE MATERIAL RESPONSE
FIRST STEP LENGTH0.0500 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 A83768-1?
A83768-1 is a SEAT,HELICAL COMPRESSION SPRING.
What is the NSN for A83768-1?
A83768-1 is cataloged in the U.S. Government catalog under NSN 5340-01-290-7563. 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.