PartsTable
Technical Data Sheet
PartsTable / MRO / 121555
121555 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
2RS = sealed for life, ZZ = shielded re-greaseable ABEC grade: higher = tighter tolerance
ABEC-1 standard, ABEC-7+ for precision spindles
PRODUCT OVERVIEW

The SWITCH SUBASSEMBLY is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING, temp_rating: 500.0 FAHRENHEIT NOMINAL DEGF, corner_shape: SQUARE INSIDE LEFT CORNER, hole_diameter: 0.1875 INCHES NOMINAL FIRST IN, overall_length: 1.0520 INCHES MINIMUM AND 1.0720 INCHES MAXIMUM IN, pressure_rating: 1500.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-376-8643, 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
MRO→ MRO_GENERAL→ 121555
NSN: 3120-00-376-8643
FSC: 3120
CAGE: 0AX87 — JPI TRANSPORTATION PRODUCTS INC (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING
temp_rating500.0 FAHRENHEIT NOMINAL DEGF
corner_shapeSQUARE INSIDE LEFT CORNER
hole_diameter0.1875 INCHES NOMINAL FIRST IN
overall_length1.0520 INCHES MINIMUM AND 1.0720 INCHES MAXIMUM IN
pressure_rating1500.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS
special_featuresFOR 0.500 BY 1.000 IN. SAFETY RELIEF VALVE IN
style_designatorSPLIT, PLAIN, NO OUTSIDE FLANGES
surface_treatmentTIN OVERALL
body_inside_diameter2.0710 INCHES MINIMUM AND 2.0735 INCHES MAXIMUM IN
body_outside_diameter2.2205 INCHES MINIMUM AND 2.2220 INCHES MAXIMUM IN
end_item_identificationSUPPLY CLASS AOE
NSN3120-00-376-8643
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 121555 · OEM ⚠ VERIFY BEFORE ORDERING ABEC grade: higher = tighter tolerance = higher cost. ABEC-1 is standard, ABEC-7+ for precision spindles. Open, shielded (ZZ), and sealed (2RS) versions have different max RPM ratings ✓ BROKER TIP 2RS = sealed for life (no maintenance). ZZ = shielded, re-greaseable. Open = must lubricate on install. Common interchange: 6205-2RS = 6205-2RSR = 6205-DDU (same bearing, different suffix) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
BODY INSIDE DIAMETER: 2.0710 INCHES MINIMUM AND 2.0735 INCHES MAXIMUM IN
•
CORNER SHAPE: CHAMFERED OUTSIDE LEFT CORNER
•
BODY OUTSIDE DIAMETER: 2.2205 INCHES MINIMUM AND 2.2220 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: SPLIT, PLAIN, NO OUTSIDE FLANGES
•
SURFACE TREATMENT: TIN OVERALL
•
MATERIAL: TIN ALLOY INNER LAYER
•
ANTIROTATION/LUBRICATION TYPE AND QUANTITY: 1 HOLE
•
HOLE DIAMETER: 0.1875 INCHES NOMINAL FIRST IN
TECHNICAL CHARACTERISTICS (FLIS)
BODY INSIDE DIAMETER2.0710 INCHES MINIMUM AND 2.0735 INCHES MAXIMUM IN
CORNER SHAPECHAMFERED OUTSIDE LEFT CORNER
BODY OUTSIDE DIAMETER2.2205 INCHES MINIMUM AND 2.2220 INCHES MAXIMUM IN
STYLE DESIGNATORSPLIT, PLAIN, NO OUTSIDE FLANGES
SURFACE TREATMENTTIN OVERALL
MATERIALTIN ALLOY INNER LAYER
ANTIROTATION/LUBRICATION TYPE AND QUANTITY1 HOLE
HOLE DIAMETER0.1875 INCHES NOMINAL FIRST IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-643 FED SPEC ALL MATERIAL RESPONSES OUTER LAYER
CORNER SHAPESQUARE INSIDE RIGHT CORNER
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
121555Interchangeable
interchangeable cross-reference
interchangeable
120781Interchangeable
interchangeable cross-reference
interchangeable
DS-G-74893 ITEM 3Interchangeable
interchangeable cross-reference
interchangeable
DS-G-74893Interchangeable
interchangeable cross-reference
interchangeable
CS346Interchangeable
Same NIIN cross-reference
interchangeable
70261R1Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
Ready to buy 121555?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 121555?
121555 is a SWITCH SUBASSEMBLY. It is classified as a MRO (MRO_GENERAL).
What parts can replace 121555?
There are 7 known substitutes for 121555: 121555, 120781, DS-G-74893 ITEM 3 and 4 more. Substitute compatibility should be verified for your specific system.
Is 121555 still available?
121555 is currently cancelled.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 121555

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026