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AT61AA202 ✓ 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,SELF-LOCKING,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: HEXAGON, nut_height: 0.344 INCHES NOMINAL IN, thread_class: 2B, thread_series: UNF, locking_feature: PREVAILING TORQUE ALL METAL DESIGN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-032-9983, 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
AT61AA202
NSN: 5310-00-032-9983
FSC: 5310
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.344 INCHES NOMINAL IN
thread_class2B
thread_seriesUNF
locking_featurePREVAILING TORQUE ALL METAL DESIGN
thread_directionRIGHT-HAND
width_across_flats0.500 INCHES NOMINAL IN
nominal_thread_size0.312 INCHES IN
bearing_surface_typeCHAMFERED
thread_quantity_per_inch24
NSN5310-00-032-9983
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: AT61AA202 · 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
•
NUT STYLE: HEXAGON
•
NOMINAL THREAD SIZE: 0.312 INCHES IN
•
THREAD QUANTITY PER INCH: 24
•
BEARING SURFACE TYPE: CHAMFERED
•
THREAD SERIES: UNF
•
SURFACE TREATMENT: CADMIUM OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL: STEEL COMP 1118 OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
NUT STYLEHEXAGON
NOMINAL THREAD SIZE0.312 INCHES IN
THREAD QUANTITY PER INCH24
BEARING SURFACE TYPECHAMFERED
THREAD SERIESUNF
SURFACE TREATMENTCADMIUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP 1118 OVERALL
THREAD CLASS3B
THREAD DIRECTIONRIGHT-HAND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
117133Interchangeable
interchangeable cross-reference
interchangeable
NASM24692Interchangeable
interchangeable cross-reference
interchangeable
NASM16610Interchangeable
interchangeable cross-reference
interchangeable
AT61AA202Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AT61AA202?
AT61AA202 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace AT61AA202?
There are 4 known substitutes for AT61AA202: 117133, NASM24692, NASM16610 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AT61AA202?
AT61AA202 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-032-9983. 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