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12592579 — NUT,PLAIN,EXTENDED WASHER,HEXAGO

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

12592579: NUT,PLAIN,EXTENDED WASHER,HEXAGO.

NUT,PLAIN,EXTENDED WASHER,HEXAGO. Key specifications include material: STEEL OVERALL, nut_style: HEXAGON, thread_class: 2B, thread_series: UNF, overall_height: 1.060 INCHES NOMINAL IN, hardness_rating: 24.0 ROCKWELL C MINIMUM AND 31.0 ROCKWELL C MAXIMUM. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-342-3684, 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
12592579
NSN: 5310-01-342-3684
FSC: 5310 — Nuts and Washers
CAGE: 19200 — COMBAT CAPABILITIES DEVELOPMENT COMMAND (CCDC) ARMAMENTS CENTER DBA CCDC DIV LOGISTICS RESEARCH AND ENGINEERING DIRECTORATE (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
thread_class2B
thread_seriesUNF
overall_height1.060 INCHES NOMINAL IN
hardness_rating24.0 ROCKWELL C MINIMUM AND 31.0 ROCKWELL C MAXIMUM
thread_directionRIGHT-HAND
washer_thickness0.390 INCHES NOMINAL IN
width_across_flats1.875 INCHES NOMINAL IN
nominal_thread_size1.250 INCHES IN
end_item_identificationM119A1 HOWITZER
washer_outside_diameter2.510 INCHES NOMINAL IN
NSN5310-01-342-3684
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 12592579 · 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
•
WASHER OUTSIDE DIAMETER: 2.510 INCHES NOMINAL IN
•
WIDTH ACROSS FLATS: 1.875 INCHES NOMINAL IN
•
THREAD SERIES: UNF
•
HARDNESS RATING: 24.0 ROCKWELL C MINIMUM AND 31.0 ROCKWELL C MAXIMUM
•
WASHER THICKNESS: 0.390 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 1.250 INCHES IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT1.060 INCHES NOMINAL IN
WASHER OUTSIDE DIAMETER2.510 INCHES NOMINAL IN
WIDTH ACROSS FLATS1.875 INCHES NOMINAL IN
THREAD SERIESUNF
HARDNESS RATING24.0 ROCKWELL C MINIMUM AND 31.0 ROCKWELL C MAXIMUM
WASHER THICKNESS0.390 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE1.250 INCHES IN
NUT STYLEHEXAGON
THREAD CLASS2B
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

No substitute or cross-reference records for this part.

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 12592579?
12592579 is a NUT,PLAIN,EXTENDED WASHER,HEXAGO.
What is the NSN for 12592579?
12592579 is cataloged in the U.S. Government catalog under NSN 5310-01-342-3684. 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.