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Technical Data Sheet
D2859 ✓ 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

The GEAR,HELICAL is a the manufacturer industrial component. Key specifications include material: STEEL, body_style: PLAIN, SOLID, bore_style: PLAIN BOTH ENDS, teeth_type: SINGLE HELIX, tooth_form: STANDARD, head_height: 0.078 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-205-3771, 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
D2859
NSN: 5340-00-205-3771
FSC: 5340
CAGE: 57771 — EDWIN B. STIMPSON COMPANY, INC. DBA STIMPSON (USA)
SPECIFICATIONS
materialSTEEL
body_stylePLAIN, SOLID
bore_stylePLAIN BOTH ENDS
teeth_typeSINGLE HELIX
tooth_formSTANDARD
head_height0.078 INCHES NOMINAL IN
helix_angle10.0000 DEGREES
overall_height0.297 INCHES NOMINAL IN
pitch_diameter1.7770 INCHES NOMINAL IN
pressure_angle30.0000 DEGREES
prong_quantity8
teeth_quantity12
NSN5340-00-205-3771
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: D2859 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
HOLE ACCOMMODATION DIAMETER: 0.625 INCHES NOMINAL IN
MATERIAL: COPPER ALLOY
HEAD OUTSIDE DIAMETER: 0.812 INCHES NOMINAL IN
PRONG QUANTITY: 8
SURFACE TREATMENT: NICKEL
HEAD HEIGHT: 0.078 INCHES NOMINAL IN
MATERIAL ACCOMMODATED THICKNESS: 0.062 INCHES MINIMUM AND 0.094 INCHES MAXIMUM IN
STYLE DESIGNATOR: STANDARD
TECHNICAL CHARACTERISTICS (FLIS)
HOLE ACCOMMODATION DIAMETER0.625 INCHES NOMINAL IN
MATERIALCOPPER ALLOY
HEAD OUTSIDE DIAMETER0.812 INCHES NOMINAL IN
PRONG QUANTITY8
SURFACE TREATMENTNICKEL
HEAD HEIGHT0.078 INCHES NOMINAL IN
MATERIAL ACCOMMODATED THICKNESS0.062 INCHES MINIMUM AND 0.094 INCHES MAXIMUM IN
STYLE DESIGNATORSTANDARD
OVERALL HEIGHT0.297 INCHES NOMINAL IN
PRONG OUTSIDE DIAMETER0.632 INCHES MINIMUM AND 0.642 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
D2-859Interchangeable
interchangeable cross-reference
interchangeable
SS-48172Interchangeable
interchangeable cross-reference
interchangeable
HY000077-505Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is D2859?
D2859 is a GEAR,HELICAL.
What parts can replace D2859?
There are 3 known substitutes for D2859: D2-859, SS-48172, HY000077-505. Substitute compatibility should be verified for your specific system.
What is the NSN for D2859?
D2859 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-205-3771. This indicates validated use in U.S. government and defense supply chains.
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