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539-0439 — NUT,PLAIN,CAP

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

539-0439: NUT,PLAIN,CAP.

The NUT,PLAIN,CAP is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: CAP, nut_height: 18.0 MILLIMETERS NOMINAL MM, nut_length: 18.0 MILLIMETERS NOMINAL MM, thread_direction: RIGHT-HAND, surface_treatment: ZINC OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-725-1008, 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
539-0439
NSN: 5310-01-725-1008
FSC: 5310 — Nuts and Washers
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleCAP
nut_height18.0 MILLIMETERS NOMINAL MM
nut_length18.0 MILLIMETERS NOMINAL MM
thread_seriesM
thread_directionRIGHT-HAND
surface_treatmentZINC OVERALL
width_across_flats14.0 MILLIMETERS NOMINAL MM
nominal_thread_size1.25 MILLIMETERS MM
part_name_assigned_by_controlling_agencyHEX ACORN NUT
NSN5310-01-725-1008
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 539-0439 · 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: 14.0 MILLIMETERS NOMINAL MM
•
NUT LENGTH: 18.0 MILLIMETERS NOMINAL MM
•
THREAD SERIES: M
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 1.25 MILLIMETERS MM
•
NUT HEIGHT: 18.0 MILLIMETERS NOMINAL MM
•
SURFACE TREATMENT: ZINC OVERALL
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS14.0 MILLIMETERS NOMINAL MM
NUT LENGTH18.0 MILLIMETERS NOMINAL MM
THREAD SERIESM
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE1.25 MILLIMETERS MM
NUT HEIGHT18.0 MILLIMETERS NOMINAL MM
SURFACE TREATMENTZINC OVERALL
PART NAME ASSIGNED BY CONTROLLING AGENCYHEX ACORN NUT
NUT STYLECAP
MATERIALSTEEL OVERALL
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES 1
A22726Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 539-0439?
539-0439 is a NUT,PLAIN,CAP.
What parts can replace 539-0439?
There is 1 known substitute for 539-0439: A22726. Substitute compatibility should be verified for your specific system.
What is the NSN for 539-0439?
539-0439 is cataloged in the U.S. Government catalog under NSN 5310-01-725-1008. 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.