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A16503 ✓ 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 material: STEEL OVERALL, body_width: 0.766 INCHES NOMINAL IN, body_height: 0.656 INCHES NOMINAL IN, body_length: 0.891 INCHES NOMINAL IN, thread_class: 3B, thread_series: UNEF. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-630-5006, 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
A16503
NSN: 5310-00-630-5006
FSC: 5310
CAGE: 98889 — AEROCONTROLEX GROUP, INC. DIV TALLEY ACTUATORS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
body_width0.766 INCHES NOMINAL IN
body_height0.656 INCHES NOMINAL IN
body_length0.891 INCHES NOMINAL IN
thread_class3B
thread_seriesUNEF
inclosure_typeFULLY INCLOSED
mounting_methodTERMINAL SINGLE GROUP
frequency_rating300.0 HERTZ MINIMUM AND 1.7 KILOHERTZ MAXIMUM SINGLE COMPONENT
thread_directionLEFT-HAND
surface_treatmentCADMIUM OVERALL
nominal_thread_size0.688 INCHES IN
NSN5310-00-630-5006
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: A16503 · 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
•
MATERIAL: STEEL OVERALL
•
THREAD SERIES: UNEF
•
THREAD QUANTITY PER INCH: 24
•
NOMINAL THREAD SIZE: 0.688 INCHES IN
•
THREAD DIRECTION: LEFT-HAND
•
SURFACE TREATMENT: CADMIUM OVERALL
•
THREAD CLASS: 3B
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL OVERALL
THREAD SERIESUNEF
THREAD QUANTITY PER INCH24
NOMINAL THREAD SIZE0.688 INCHES IN
THREAD DIRECTIONLEFT-HAND
SURFACE TREATMENTCADMIUM OVERALL
THREAD CLASS3B
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
24963Interchangeable
interchangeable cross-reference
interchangeable
16503Interchangeable
interchangeable cross-reference
interchangeable
40838Interchangeable
interchangeable cross-reference
interchangeable
292-5228Interchangeable
interchangeable cross-reference
interchangeable
SMB528032Interchangeable
interchangeable cross-reference
interchangeable
SD16503Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A16503?
A16503 is a TRANSFORMER,AUDIO FREQUENCY.
What parts can replace A16503?
There are 11 known substitutes for A16503: 24963, 16503, 40838 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A16503?
A16503 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-630-5006. 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