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556593 — SEAT,HELICAL COMPRESSION SPRING

✓ Government record, cited
bluechip · ORING SEAL
PRODUCT OVERVIEW

556593: SEAT,HELICAL COMPRESSION SPRING.

SEAT,HELICAL COMPRESSION SPRING. Key specifications include dial_size: 4 INCH IN, scale_name: PRESSURE, scale_range: +0.0 TO 600.0 POUNDS PRESSURE PER SQUARE INCH LBS, supplementary_features: CONTROLLING AGENCY NOMENCLATURE GAUGE. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-905-2759, 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
556593
NSN: 5340-00-905-2759
NIINs: 009052759, 014897032
FSC: 5340 — Hardware, Commercial
CAGE: 73030 — HAMILTON SUNDSTRAND CORPORATION DBA COLLINS AEROSPACE (USA)
SPECIFICATIONS
dial_size4 INCH IN
scale_namePRESSURE
scale_range+0.0 TO 600.0 POUNDS PRESSURE PER SQUARE INCH LBS
supplementary_featuresCONTROLLING AGENCY NOMENCLATURE GAUGE
NSN5340-00-905-2759
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 556593 MFR: bluechip ⚠ 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: ACFT CABIN PRESSURIZATION SYSTEM
•
FIRST STEP DIAMETER: 1.1200 INCHES NOMINAL IN
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END DIAMETER: 0.8710 INCHES MINIMUM AND 0.8790 INCHES MAXIMUM IN
•
DISTANCE FROM END TO FIRST STEP: 0.2100 INCHES NOMINAL IN
•
DESIGN TYPE: SOLID
•
STYLE DESIGNATOR: SEAT
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.2600 INCHES NOMINAL IN
FSC APPLICATION DATAACFT CABIN PRESSURIZATION SYSTEM
FIRST STEP DIAMETER1.1200 INCHES NOMINAL IN
END DIAMETER0.8710 INCHES MINIMUM AND 0.8790 INCHES MAXIMUM IN
DISTANCE FROM END TO FIRST STEP0.2100 INCHES NOMINAL IN
DESIGN TYPESOLID
STYLE DESIGNATORSEAT
SPECIAL FEATURESNOT CASEHARDENED
SURFACE TREATMENTANODIZE
BORE DIAMETER0.7550 INCHES MINIMUM AND 0.7650 INCHES MAXIMUM IN
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 556593?
556593 is a SEAT,HELICAL COMPRESSION SPRING manufactured by bluechip.
What is the NSN for 556593?
556593 is cataloged in the U.S. Government catalog under NSN 5340-00-905-2759. 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.