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103889 — KNUCKLE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

103889: KNUCKLE.

The KNUCKLE is a the manufacturer industrial component. Key specifications include radius: 0.406 INCHES NOMINAL IN, material: STEEL, outside_diameter: 0.372 INCHES MINIMUM AND 0.377 INCHES MAXIMUM IN, style_designator: CONCAVE, material_thickness: 0.065 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-197-0385, 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
103889
NSN: 5340-00-197-0385
NIINs: 001970385, 003750730, 004989619
FSC: 5340 — Hardware, Commercial
CAGE: 72582 — ROLLS-ROYCE SOLUTIONS AMERICA INC (USA)
SPECIFICATIONS
radius0.406 INCHES NOMINAL IN
materialSTEEL
outside_diameter0.372 INCHES MINIMUM AND 0.377 INCHES MAXIMUM IN
style_designatorCONCAVE
material_thickness0.065 INCHES NOMINAL IN
NSN5340-00-197-0385
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 103889 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
•
RADIUS: 0.406 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 0.372 INCHES MINIMUM AND 0.377 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: CONCAVE
•
MATERIAL THICKNESS: 0.065 INCHES NOMINAL IN
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
RADIUS0.406 INCHES NOMINAL IN
OUTSIDE DIAMETER0.372 INCHES MINIMUM AND 0.377 INCHES MAXIMUM IN
STYLE DESIGNATORCONCAVE
MATERIAL THICKNESS0.065 INCHES NOMINAL IN
MATERIALSTEEL
SUBSTITUTES & CROSS-REFERENCES 7
02531Reference document
Same NSN cross-reference
Reference document — Secondary reference
303SZ21Reference document
Same NSN cross-reference
Reference document — Secondary reference
50104Reference document
Same NSN cross-reference
Reference document — Secondary reference
172525Reference document
Same NSN cross-reference
Reference document — Secondary reference
X981Reference document
Same NSN cross-reference
Reference document — Secondary reference
MIL-P-20691Reference document
Same NSN cross-reference
Reference document — Identification reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 103889?
103889 is a KNUCKLE.
What parts can replace 103889?
There are 7 known substitutes for 103889: 02531, 303SZ21, 50104 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 103889?
103889 is cataloged in the U.S. Government catalog under NSN 5340-00-197-0385. This indicates validated use in U.S. government and defense supply chains.
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