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HR20109 ✓ 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: 1.0000 INCHES NOMINAL IN, bore_diameter: 1.0050 INCHES NOMINAL IN, overall_height: 0.7020 INCHES NOMINAL IN, special_features: SEVEN DEG TAPERED SEAT TOP. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-389-9271, 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
HR20109
NSN: 5340-00-389-9271
FSC: 5340
CAGE: 51228 — ECOLAIRE INC BALDWIN-HAMILTON CO DIV (USA)
SPECIFICATIONS
materialSTEEL
design_typeSOLID
end_diameter1.0000 INCHES NOMINAL IN
bore_diameter1.0050 INCHES NOMINAL IN
overall_height0.7020 INCHES NOMINAL IN
special_featuresSEVEN DEG TAPERED SEAT TOP
style_designatorSEAT
bore_taper_in_deg10.0
first_step_length0.1650 INCHES NOMINAL IN
second_step_length0.1400 INCHES NOMINAL IN
first_step_diameter1.0670 INCHES NOMINAL IN
third_step_diameter2.1950 INCHES NOMINAL IN
NSN5340-00-389-9271
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: HR20109 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
•
SECOND STEP DIAMETER: 1.6670 INCHES NOMINAL IN
•
DESIGN TYPE: SOLID
•
END DIAMETER: 1.0000 INCHES NOMINAL IN
•
DISTANCE FROM END TO FIRST STEP: 0.1970 INCHES NOMINAL IN
•
BORE TAPER IN DEG: 10.0
•
STYLE DESIGNATOR: SEAT
TECHNICAL CHARACTERISTICS (FLIS)
SECOND STEP DIAMETER1.6670 INCHES NOMINAL IN
OVERALL HEIGHT0.7020 INCHES NOMINAL IN
DESIGN TYPESOLID
END DIAMETER1.0000 INCHES NOMINAL IN
DISTANCE FROM END TO FIRST STEP0.1970 INCHES NOMINAL IN
BORE TAPER IN DEG10.0
SPECIAL FEATURESSEVEN DEG TAPERED SEAT TOP
STYLE DESIGNATORSEAT
MATERIALSTEEL
FIRST STEP DIAMETER1.0670 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
60656Interchangeable
interchangeable cross-reference
interchangeable
100138Interchangeable
interchangeable cross-reference
interchangeable
146-26Interchangeable
interchangeable cross-reference
interchangeable
43-446Interchangeable
interchangeable cross-reference
interchangeable
206555Interchangeable
interchangeable cross-reference
interchangeable
REPLACEMENTPUNCHInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is HR20109?
HR20109 is a SEAT,HELICAL COMPRESSION SPRING.
What parts can replace HR20109?
There are 22 known substitutes for HR20109: 60656, 100138, 146-26 and 19 more. Substitute compatibility should be verified for your specific system.
What is the NSN for HR20109?
HR20109 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-389-9271. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026