PartsTable
Technical Data Sheet
68-1660-24 ✓ 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

NUT,SELF-LOCKING,SINGLE BALL SEA. Key specifications include material: ALUMINUM ALLOY 2011 OVERALL, nut_style: SINGLE BALL SEAT, HEXAGON, nut_height: 0.080 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN, thread_class: 3B, thread_series: UNF, locking_feature: PREVAILING TORQUE WITH NONMETALLIC INSERT. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-688-1266, 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
68-1660-24
NSN: 5310-00-688-1266
FSC: 5310
CAGE: 72962 — HARVARD INDUSTRIES INC (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2011 OVERALL
nut_styleSINGLE BALL SEAT, HEXAGON
nut_height0.080 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN
thread_class3B
thread_seriesUNF
locking_featurePREVAILING TORQUE WITH NONMETALLIC INSERT
width_across_flats0.150 INCHES MINIMUM AND 0.158 INCHES MAXIMUM IN
nominal_thread_size0.086 INCHES IN
thread_quantity_per_inch64
NSN5310-00-688-1266
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 68-1660-24 · 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
WIDTH ACROSS FLATS: 0.150 INCHES MINIMUM AND 0.158 INCHES MAXIMUM IN
LOCKING FEATURE: PREVAILING TORQUE WITH NONMETALLIC INSERT
THREAD QUANTITY PER INCH: 64
NUT STYLE: HEXAGON
NOMINAL THREAD SIZE: 0.086 INCHES IN
BEARING SURFACE TYPE: CHAMFERED
THREAD SERIES: UNF
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
WIDTH ACROSS FLATS0.150 INCHES MINIMUM AND 0.158 INCHES MAXIMUM IN
LOCKING FEATUREPREVAILING TORQUE WITH NONMETALLIC INSERT
THREAD QUANTITY PER INCH64
NUT STYLEHEXAGON
NOMINAL THREAD SIZE0.086 INCHES IN
BEARING SURFACE TYPECHAMFERED
THREAD SERIESUNF
THREAD DIRECTIONRIGHT-HAND
NUT HEIGHT0.095 INCHES NOMINAL IN
MATERIALALUMINUM ALLOY 2011 NUT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
S104Interchangeable
interchangeable cross-reference
interchangeable
179848Interchangeable
interchangeable cross-reference
interchangeable
5305PL0636374Interchangeable
interchangeable cross-reference
interchangeable
68-1660-24Interchangeable
interchangeable cross-reference
interchangeable
14209-2Interchangeable
interchangeable cross-reference
interchangeable
10587352-1Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 68-1660-24?
68-1660-24 is a NUT,SELF-LOCKING,SINGLE BALL SEA.
What parts can replace 68-1660-24?
There are 8 known substitutes for 68-1660-24: S104, 179848, 5305PL0636374 and 5 more. Substitute compatibility should be verified for your specific system.
Is 68-1660-24 still available?
68-1660-24 is currently cancelled.
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