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18D05 — NUT,SELF-LOCKING,CASTELLATED,HEX

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

18D05: NUT,SELF-LOCKING,CASTELLATED,HEX.

NUT,SELF-LOCKING,CASTELLATED,HEX. Key specifications include material: STEEL OVERALL, nut_style: CASTELLATED, HEXAGON, nut_height: 0.350 INCHES NOMINAL IN, thread_class: 3B, thread_series: UNF, locking_feature: PREVAILING TORQUE WITH NONMETALLIC INSERT. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-464-4805, 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
18D05
NSN: 5310-00-464-4805
FSC: 5310 — Nuts and Washers
CAGE: 12603 — CLARK EQUIPMENT CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleCASTELLATED, HEXAGON
nut_height0.350 INCHES NOMINAL IN
thread_class3B
thread_seriesUNF
locking_featurePREVAILING TORQUE WITH NONMETALLIC INSERT
thread_directionRIGHT-HAND
surface_treatmentCADMIUM AND CHROMATE OVERALL
width_across_flats0.500 INCHES NOMINAL IN
nominal_thread_size0.312 INCHES IN
bearing_surface_typeCHAMFERED
thread_quantity_per_inch24
NSN5310-00-464-4805
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 18D05 · 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: 0.500 INCHES NOMINAL IN
•
THREAD SERIES: UNF
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.312 INCHES IN
•
LOCKING FEATURE: PREVAILING TORQUE WITH NONMETALLIC INSERT
•
NUT HEIGHT: 0.350 INCHES NOMINAL IN
•
SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL
•
NUT STYLE: CASTELLATED, HEXAGON
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.500 INCHES NOMINAL IN
THREAD SERIESUNF
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.312 INCHES IN
LOCKING FEATUREPREVAILING TORQUE WITH NONMETALLIC INSERT
NUT HEIGHT0.350 INCHES NOMINAL IN
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
NUT STYLECASTELLATED, HEXAGON
THREAD CLASS3B
THREAD QUANTITY PER INCH24
SUBSTITUTES & CROSS-REFERENCES 1
60D5Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 18D05?
18D05 is a NUT,SELF-LOCKING,CASTELLATED,HEX.
What parts can replace 18D05?
There is 1 known substitute for 18D05: 60D5. Substitute compatibility should be verified for your specific system.
What is the NSN for 18D05?
18D05 is cataloged in the U.S. Government catalog under NSN 5310-00-464-4805. 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.