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520955 — HOLDER,SPRING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

520955: HOLDER,SPRING.

The HOLDER,SPRING is a the manufacturer industrial component. Key specifications include material: STEEL, usage_design: CENTERS AND POSITIONS SPRING, fsc_application_data: 1. CONTROL ASSEMBLY,FUEL, attachment_to_item_supported_method: FRICTION MOUNTED BY SPRING COMPRESSION, supporting_object/surface_attachment_method: FRICTION MTG OF MATING MACHINED PARTS BY SPRING COMPRESSION.

This part is cataloged in the U.S. Government catalog under NSN 5340-00-576-5337, 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
520955
NSN: 5340-00-576-5337
FSC: 5340 — Hardware, Commercial
CAGE: 73030 — HAMILTON SUNDSTRAND CORPORATION DBA COLLINS AEROSPACE (USA)
SPECIFICATIONS
materialSTEEL
usage_designCENTERS AND POSITIONS SPRING
fsc_application_data1. CONTROL ASSEMBLY,FUEL
attachment_to_item_supported_methodFRICTION MOUNTED BY SPRING COMPRESSION
supporting_object/surface_attachment_methodFRICTION MTG OF MATING MACHINED PARTS BY SPRING COMPRESSION
NSN5340-00-576-5337
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 520955 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: 1. CONTROL ASSEMBLY,FUEL
•
SUPPORTING OBJECT/SURFACE ATTACHMENT METHOD: FRICTION MTG OF MATING MACHINED PARTS BY SPRING COMPRESSION
•
ATTACHMENT TO ITEM SUPPORTED METHOD: FRICTION MOUNTED BY SPRING COMPRESSION
•
MATERIAL: STEEL
•
USAGE DESIGN: CENTERS AND POSITIONS SPRING
TECHNICAL CHARACTERISTICS
FSC APPLICATION DATA1. CONTROL ASSEMBLY,FUEL
SUPPORTING OBJECT/SURFACE ATTACHMENT METHODFRICTION MTG OF MATING MACHINED PARTS BY SPRING COMPRESSION
ATTACHMENT TO ITEM SUPPORTED METHODFRICTION MOUNTED BY SPRING COMPRESSION
MATERIALSTEEL
USAGE DESIGNCENTERS AND POSITIONS SPRING
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)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 520955?
520955 is a HOLDER,SPRING.
What is the NSN for 520955?
520955 is cataloged in the U.S. Government catalog under NSN 5340-00-576-5337. 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.