PartsTable
Technical Data Sheet
EN-4 ✓ Verified by PartsTable
· NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The TRANSFORMER,AUDIO FREQUENCY is a the manufacturer industrial component. Key specifications include width: 48.000 INCHES NOMINAL IN, length: 150.000 FEET NOMINAL FT, material: PLASTIC POLYESTER, film_type: STILL PICTURE, base_color: CLEAR, hole_width: 1.500 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-903-6537, 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
EN-4
NSN: 5310-00-903-6537
FSC: 5310
CAGE: 1WU64 — BORDER STATES INDUSTRIES, INC. DBA BORDER STATES ELECTRIC SUPPLY (USA)
SPECIFICATIONS
width48.000 INCHES NOMINAL IN
length150.000 FEET NOMINAL FT
materialPLASTIC POLYESTER
film_typeSTILL PICTURE
base_colorCLEAR
hole_width1.500 INCHES NOMINAL IN
usage_formROLL
film_subtypeCAMERA
thread_class2B
emulsion_typeBLACK AND WHITE
thread_seriesUNIFIED NATIONAL COARSE (UNC)
exposure_index6 AMERICAN NATIONAL STANDARDS INSTITUTE TUNGSTEN AND 10 AMERICAN NATIONAL STANDARDS INSTITUTE WHITE FLAME ARC
NSN5310-00-903-6537
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: EN-4 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
THREAD CLASS: 2B
NOMINAL THREAD SIZE: 0.500 INCHES IN
SURFACE TREATMENT: ZINC OVERALL
FABRICATION METHOD: FORGED
THREAD DIRECTION: RIGHT-HAND
MATERIAL: STEEL OVERALL
HOLE WIDTH: 1.500 INCHES NOMINAL IN
THREAD QUANTITY PER INCH: 13
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS2B
NOMINAL THREAD SIZE0.500 INCHES IN
SURFACE TREATMENTZINC OVERALL
FABRICATION METHODFORGED
THREAD DIRECTIONRIGHT-HAND
MATERIALSTEEL OVERALL
HOLE WIDTH1.500 INCHES NOMINAL IN
THREAD QUANTITY PER INCH13
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
RAL4Interchangeable
interchangeable cross-reference
interchangeable
RAL4-44X100Interchangeable
interchangeable cross-reference
interchangeable
PRECISION LINE LPF4Interchangeable
interchangeable cross-reference
interchangeable
197 4070Interchangeable
interchangeable cross-reference
interchangeable
GRA3Interchangeable
interchangeable cross-reference
interchangeable
EN-4Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is EN-4?
EN-4 is a TRANSFORMER,AUDIO FREQUENCY.
What parts can replace EN-4?
There are 14 known substitutes for EN-4: RAL4, RAL4-44X100, PRECISION LINE LPF4 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for EN-4?
EN-4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-903-6537. This indicates validated use in U.S. government and defense supply chains.
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