PartsTable
Technical Data Sheet
121540 ✓ Verified by PartsTable
· MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The SWITCH,ROTARY is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 268 OVERALL, thickness: 0.022 INCHES MINIMUM AND 0.028 INCHES MAXIMUM IN, head_style: ROUND, head_height: 0.123 INCHES MINIMUM AND 0.137 INCHES MAXIMUM IN, shaft_length: 0.750 INCHES NOMINAL SINGLE ACTUATOR IN, thread_class: 2A SINGLE MOUNTING FACILITY A. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-206-7876, 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 121540
NSN: 5305-00-206-7876
FSC: 5305
CAGE: 18876 — US ARMY AVIATION AND MISSILE COMMAND (USA)
SPECIFICATIONS
materialCOPPER ALLOY 268 OVERALL
thickness0.022 INCHES MINIMUM AND 0.028 INCHES MAXIMUM IN
head_styleROUND
head_height0.123 INCHES MINIMUM AND 0.137 INCHES MAXIMUM IN
shaft_length0.750 INCHES NOMINAL SINGLE ACTUATOR IN
thread_class2A SINGLE MOUNTING FACILITY A
head_diameter0.334 INCHES MINIMUM AND 0.359 INCHES MAXIMUM IN
hole_diameter0.115 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN
overall_width1.500 INCHES NOMINAL IN
pole_quantity1 SINGLE SECTION REAR
terminal_typeQUICK DISCONNECT, MALE
thread_length0.312 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
NSN5305-00-206-7876
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 121540 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
THREAD SERIES DESIGNATOR: UNF
HEAD STYLE: ROUND
THREAD CLASS: 2A A
THREAD QUANTITY PER INCH: 32
SCREW MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD SINGLE MATERIAL RESPONSE
FASTENER LENGTH: 0.281 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
INTERNAL DRIVE STYLE: SLOT
HEAD DIAMETER: 0.334 INCHES MINIMUM AND 0.359 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIES DESIGNATORUNF
HEAD STYLEROUND
THREAD CLASS2A A
THREAD QUANTITY PER INCH32
SCREW MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD SINGLE MATERIAL RESPONSE
FASTENER LENGTH0.281 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
INTERNAL DRIVE STYLESLOT
HEAD DIAMETER0.334 INCHES MINIMUM AND 0.359 INCHES MAXIMUM IN
SCREW SURFACE TREATMENTCADMIUM OR ZINC
SCREW MATERIALSTEEL COMP 1010 OR STEEL COMP 1020
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
1FX49Interchangeable
interchangeable cross-reference
interchangeable
F37030-238Interchangeable
interchangeable cross-reference
interchangeable
28212PC15Interchangeable
interchangeable cross-reference
interchangeable
390013PC481Interchangeable
interchangeable cross-reference
interchangeable
150-436GPC481Interchangeable
interchangeable cross-reference
interchangeable
533837PC481Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 121540?
121540 is a SWITCH,ROTARY. It is classified as a MRO (MRO_GENERAL).
What parts can replace 121540?
There are 20 known substitutes for 121540: 1FX49, F37030-238, 28212PC15 and 17 more. Substitute compatibility should be verified for your specific system.
Is 121540 still available?
121540 is currently cancelled.
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