PartsTable
Technical Data Sheet
AN320-9 ✓ 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 NUT,PLAIN,SLOTTED,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: SLOTTED, HEXAGON, nut_height: 0.297 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN, thread_class: 3B, thread_series: UNF, thread_direction: RIGHT-HAND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-176-8113, 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
AN320-9
NSN: 5310-00-176-8113
FSC: 5310
CAGE: A0126 — LEONARDO SPA HELICOPTERS DIVISION - PRODUCTION SITE (ITA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleSLOTTED, HEXAGON
nut_height0.297 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
thread_class3B
thread_seriesUNF
thread_directionRIGHT-HAND
surface_treatmentCADMIUM AND CHROMATE OVERALL
width_across_flats0.863 INCHES MINIMUM AND 0.877 INCHES MAXIMUM IN
nominal_thread_size0.562 INCHES IN
bearing_surface_typeCHAMFERED OR WASHER FACED
bearing_surface_finish125.0 MICROINCHES
thread_quantity_per_inch18
NSN5310-00-176-8113
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: AN320-9 · 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
BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
BEARING SURFACE FINISH: 125.0 MICROINCHES
THREAD SERIES: UNF
NOMINAL THREAD SIZE: 0.562 INCHES IN
THREAD QUANTITY PER INCH: 18
THREAD CLASS: 3B
MATERIAL: STEEL OVERALL
WIDTH ACROSS FLATS: 0.863 INCHES MINIMUM AND 0.877 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
BEARING SURFACE FINISH125.0 MICROINCHES
THREAD SERIESUNF
NOMINAL THREAD SIZE0.562 INCHES IN
THREAD QUANTITY PER INCH18
THREAD CLASS3B
MATERIALSTEEL OVERALL
WIDTH ACROSS FLATS0.863 INCHES MINIMUM AND 0.877 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
3409Interchangeable
interchangeable cross-reference
interchangeable
32T3409Interchangeable
interchangeable cross-reference
interchangeable
J513Interchangeable
interchangeable cross-reference
interchangeable
A1199Interchangeable
interchangeable cross-reference
interchangeable
MIL-F-15049Interchangeable
interchangeable cross-reference
interchangeable
700371Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AN320-9?
AN320-9 is a NUT,PLAIN,SLOTTED,HEXAGON.
What parts can replace AN320-9?
There are 17 known substitutes for AN320-9: 3409, 32T3409, J513 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AN320-9?
AN320-9 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-176-8113. This indicates validated use in U.S. government and defense supply chains.
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