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11993328 — NUT,SELF-LOCKING,SINGLE BALL SEA

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

11993328: NUT,SELF-LOCKING,SINGLE BALL SEA.

NUT,SELF-LOCKING,SINGLE BALL SEA. Key specifications include material: PLASTIC LOCKING INSERT, nut_style: SINGLE BALL SEAT, HEXAGON, nut_height: 0.625 INCHES MINIMUM AND 0.655 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UNEF, locking_feature: PREVAILING TORQUE WITH NONMETALLIC INSERT. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-018-0683, 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
11993328
NSN: 5310-01-018-0683
FSC: 5310 — Nuts and Washers
CAGE: U4310 — VOLVO CONSTRUCTION EQUIPMENT LTD (GBR)
SPECIFICATIONS
materialPLASTIC LOCKING INSERT
nut_styleSINGLE BALL SEAT, HEXAGON
nut_height0.625 INCHES MINIMUM AND 0.655 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNEF
locking_featurePREVAILING TORQUE WITH NONMETALLIC INSERT
thread_directionRIGHT-HAND
width_across_flats2.000 INCHES NOMINAL IN
nominal_thread_size1.250 INCHES IN
thread_quantity_per_inch18
NSN5310-01-018-0683
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 11993328 · 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: 2.000 INCHES NOMINAL IN
•
THREAD SERIES: UNEF
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 1.250 INCHES IN
•
LOCKING FEATURE: PREVAILING TORQUE WITH NONMETALLIC INSERT
•
NUT HEIGHT: 0.625 INCHES MINIMUM AND 0.655 INCHES MAXIMUM IN
•
NUT STYLE: SINGLE BALL SEAT, HEXAGON
•
THREAD CLASS: 2B
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS2.000 INCHES NOMINAL IN
THREAD SERIESUNEF
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE1.250 INCHES IN
LOCKING FEATUREPREVAILING TORQUE WITH NONMETALLIC INSERT
NUT HEIGHT0.625 INCHES MINIMUM AND 0.655 INCHES MAXIMUM IN
NUT STYLESINGLE BALL SEAT, HEXAGON
THREAD CLASS2B
THREAD QUANTITY PER INCH18
MATERIALSTEEL NUT
SUBSTITUTES & CROSS-REFERENCES 1
222960Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 11993328?
11993328 is a NUT,SELF-LOCKING,SINGLE BALL SEA.
What parts can replace 11993328?
There is 1 known substitute for 11993328: 222960. Substitute compatibility should be verified for your specific system.
What is the NSN for 11993328?
11993328 is cataloged in the U.S. Government catalog under NSN 5310-01-018-0683. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.