PartsTable
Technical Data Sheet
PartsTable / MRO / 1240-4
1240-4 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The TRANSFORMER,AUDIO FREQUENCY is a the manufacturer industrial component. Key specifications include emission_type: A2, indicator_type: AUDIO, dc_voltage_rating: 28.0 VOLTS NOMINAL LOCATION NOT OTHERWISE SPECIFIED, operating_frequency: 190.000 KILOHERTZ MINIMUM AND 550.000 KILOHERTZ MAXIMUM, accessory_component_name: DYNAMOTOR RACK,ELECTRICAL EQUIPMENT RADIO RECEIVER, accessory_controlling_agency: JETDS. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-053-5647, 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→ 1240-4
NSN: 5330-00-053-5647
FSC: 5330
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
emission_typeA2
indicator_typeAUDIO
dc_voltage_rating28.0 VOLTS NOMINAL LOCATION NOT OTHERWISE SPECIFIED
operating_frequency190.000 KILOHERTZ MINIMUM AND 550.000 KILOHERTZ MAXIMUM
frequency_band_quantity1
accessory_component_nameDYNAMOTOR RACK,ELECTRICAL EQUIPMENT RADIO RECEIVER
accessory_component_quantity3
accessory_controlling_agencyJETDS
accessory_identifying_numberDY-90/ARC TYPE NO. AND MT-1140/ARC TYPE NO. AND R-511/ARC TYPE NO.
electrical_power_source_relationshipOPERATING
joint_electronics_type_designation_system_item_nameRADIO RECEIVER
joint_electronics_type_designation_system_item_type_numberR-511/ARC
NSN5330-00-053-5647
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 1240-4 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
•
CROSS-SECTIONAL THICKNESS: 0.188 INCHES NOMINAL IN
•
APERTURE LENGTH: 15.000 INCHES NOMINAL IN
•
OUTSIDE CORNER RADIUS: 1.312 INCHES NOMINAL IN
•
INSIDE CORNER RADIUS: 0.938 INCHES NOMINAL IN
•
APERTURE WIDTH: 4.438 INCHES NOMINAL IN
•
STYLE DESIGNATOR: NON-CIRCULAR
•
MATERIAL: ASBESTOS AND CORK CASE
•
MATERIAL DOCUMENT AND CLASSIFICATION: NR30 FSCM 14564 MFR REF 1ST MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL THICKNESS0.188 INCHES NOMINAL IN
APERTURE LENGTH15.000 INCHES NOMINAL IN
OUTSIDE CORNER RADIUS1.312 INCHES NOMINAL IN
INSIDE CORNER RADIUS0.938 INCHES NOMINAL IN
APERTURE WIDTH4.438 INCHES NOMINAL IN
STYLE DESIGNATORNON-CIRCULAR
MATERIALASBESTOS AND CORK CASE
MATERIAL DOCUMENT AND CLASSIFICATIONNR30 FSCM 14564 MFR REF 1ST MATERIAL RESPONSE OVERALL
OVERALL WIDTH5.188 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
310-RTInterchangeable
interchangeable cross-reference
interchangeable
B94.11MInterchangeable
interchangeable cross-reference
interchangeable
29441Interchangeable
interchangeable cross-reference
interchangeable
C2080Interchangeable
interchangeable cross-reference
interchangeable
SCB22190AInterchangeable
interchangeable cross-reference
interchangeable
12404Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1240-4?
1240-4 is a TRANSFORMER,AUDIO FREQUENCY. It is classified as a MRO (MRO_GENERAL).
What parts can replace 1240-4?
There are 16 known substitutes for 1240-4: 310-RT, B94.11M, 29441 and 13 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1240-4?
1240-4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-053-5647. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026