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Technical Data Sheet
571729 ✓ Verified by PartsTable
· ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

SEAT,HELICAL COMPRESSION SPRING. Key specifications include material: STEEL, design_type: SOLID, end_diameter: 0.2780 INCHES MINIMUM AND 0.2810 INCHES MAXIMUM IN, bore_diameter: 0.1910 INCHES MINIMUM AND 0.2260 INCHES MAXIMUM IN, overall_height: 0.1500 INCHES NOMINAL IN, special_features: NOT CASEHARDENED. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-580-5937, 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
571729
NSN: 5331-00-580-5937
FSC: 5331 — O-RING
CAGE: 90005 — PUROLATOR FACET INC. DIV PARKER AEROSPACE FILTRATION DIVISION DBA PUROLATOR FACET, IN (USA)
SPECIFICATIONS
materialSTEEL
design_typeSOLID
end_diameter0.2780 INCHES MINIMUM AND 0.2810 INCHES MAXIMUM IN
bore_diameter0.1910 INCHES MINIMUM AND 0.2260 INCHES MAXIMUM IN
overall_height0.1500 INCHES NOMINAL IN
special_featuresNOT CASEHARDENED
style_designatorSEAT
surface_treatmentPASSIVATE
first_step_diameter0.4800 INCHES NOMINAL IN
fsc_application_dataFUEL CONTROL,TURBOSHAFT ENGINE,AIRCRAFT
material_hardness_rating75.0 ROCKWELL C MINIMUM AND 79.0 ROCKWELL C MAXIMUM
distance_from_end_to_first_step0.0900 INCHES NOMINAL IN
NSN5331-00-580-5937
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 571729 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
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
CENTER HOLE DIAMETER: 0.171 INCHES MINIMUM AND 0.181 INCHES MAXIMUM IN
OUTSIDE DIAMETER: 0.316 INCHES NOMINAL IN
ELONGATION PERCENTAGE: 250 MAXIMUM
HARDNESS RATING: 70.0 SHORE DUROMETER A NOMINAL
CROSS-SECTIONAL HEIGHT: 0.067 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
CENTER HOLE DIAMETER0.171 INCHES MINIMUM AND 0.181 INCHES MAXIMUM IN
OUTSIDE DIAMETER0.316 INCHES NOMINAL IN
ELONGATION PERCENTAGE250 MAXIMUM
HARDNESS RATING70.0 SHORE DUROMETER A NOMINAL
CROSS-SECTIONAL HEIGHT0.067 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
429-007Interchangeable
interchangeable cross-reference
interchangeable
N13107Interchangeable
interchangeable cross-reference
interchangeable
4002Interchangeable
interchangeable cross-reference
interchangeable
MS29561Interchangeable
interchangeable cross-reference
interchangeable
S8171K27Interchangeable
interchangeable cross-reference
interchangeable
SAE-AS29561Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 571729?
571729 is a SEAT,HELICAL COMPRESSION SPRING.
What parts can replace 571729?
There are 22 known substitutes for 571729: 429-007, N13107, 4002 and 19 more. Substitute compatibility should be verified for your specific system.
Is 571729 still available?
571729 is currently cancelled.
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