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LL20 — TRANSFORMER

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

LL20: TRANSFORMER.

The TRANSFORMER is a the manufacturer industrial component. Key specifications include shape: CIRCULAR, material: COPPER ALLOY OVERALL, lens_width: 2.0 INCHES NOMINAL IN, lens_length: 2.0 INCHES NOMINAL IN, lens_diameter: 1.75 INCHES NOMINAL IN, magnification: 10.0 NOMINAL. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-332-0228, 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
LL20
NSN: 5330-00-332-0228
NIINs: 003320228, 009892790, 016163403, 016423280
FSC: 5330 — Packing and Gasket Materials
CAGE: 63857 — CIRCOR NAVAL SOLUTIONS LLC DBA WARREN PUMPS (USA)
SPECIFICATIONS
shapeCIRCULAR
materialCOPPER ALLOY OVERALL
lens_width2.0 INCHES NOMINAL IN
lens_length2.0 INCHES NOMINAL IN
lens_diameter1.75 INCHES NOMINAL IN
magnification10.0 NOMINAL
special_featuresSPLIT DESIGN CONSTRUCTION. FLANGED END COUNTERBORED 2.375 IN. DIA BY 0.812 IN. DEEP IN
attachment_methodROUND HOLE
rim_surface_width0.500 INCHES NOMINAL IN
peripheral_diameter6.875 INCHES NOMINAL IN
center_hole_diameter2.188 INCHES NOMINAL IN
cross-sectional_height1.250 INCHES NOMINAL IN
NSN5330-00-332-0228
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: LL20 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
•
ATTACHMENT HOLE DIAMETER: 0.625 INCHES NOMINAL IN
•
ATTACHMENT FEATURE QUANTITY: 2
•
CROSS-SECTIONAL THICKNESS: 0.281 INCHES NOMINAL IN
•
CROSS-SECTIONAL HEIGHT: 1.250 INCHES NOMINAL IN
•
RIM SURFACE WIDTH: 0.500 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: FLANGE
•
PERIPHERAL DIAMETER: 6.875 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
ATTACHMENT HOLE DIAMETER0.625 INCHES NOMINAL IN
ATTACHMENT FEATURE QUANTITY2
CROSS-SECTIONAL THICKNESS0.281 INCHES NOMINAL IN
CROSS-SECTIONAL HEIGHT1.250 INCHES NOMINAL IN
RIM SURFACE WIDTH0.500 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLEFLANGE
PERIPHERAL DIAMETER6.875 INCHES NOMINAL IN
SPECIAL FEATURESSPLIT DESIGN CONSTRUCTION. FLANGED END COUNTERBORED 2.375 IN. DIA BY 0.812 IN. DEEP IN
CENTER HOLE DIAMETER2.188 INCHES NOMINAL IN
MATERIALCOPPER ALLOY OVERALL
SUBSTITUTES & CROSS-REFERENCES 1
BS5-1605-16Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is LL20?
LL20 is a TRANSFORMER.
What parts can replace LL20?
There is 1 known substitute for LL20: BS5-1605-16. Substitute compatibility should be verified for your specific system.
What is the NSN for LL20?
LL20 is cataloged in the U.S. Government catalog under NSN 5330-00-332-0228. 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.