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12597078 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

12597078: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 6061, TYPE 651, overall_width: 10.70 INCHES NOMINAL IN, overall_length: 15.80 INCHES NOMINAL IN, mounting_hole_type: COUNTERSUNK AND SLOTTED AND THRU HOLE, mounting_hole_quantity: 11, end_item_identification: 2350-01-538-8373. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-251-9734, 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
12597078
NSN: 5310-01-251-9734
NIINs: 012519734, 016647038
FSC: 5310 — Nuts and Washers
CAGE: 19200 — COMBAT CAPABILITIES DEVELOPMENT COMMAND (CCDC) ARMAMENTS CENTER DBA CCDC DIV LOGISTICS RESEARCH AND ENGINEERING DIRECTORATE (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 6061, TYPE 651
overall_width10.70 INCHES NOMINAL IN
overall_length15.80 INCHES NOMINAL IN
mounting_hole_typeCOUNTERSUNK AND SLOTTED AND THRU HOLE
mounting_hole_quantity11
end_item_identification2350-01-538-8373
material_document_and_classificationAMS QQ-A-250/11 AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) SINGLE MATERIAL RESPONSE OR ASTM B209 ASSN STD SINGLE MATERIAL RESPONSE
part_name_assigned_by_controlling_agencyBRACKET, ANTENNA, MUOS/X-WING
NSN5310-01-251-9734
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 12597078 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-P-16232,TYPE M,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
OVERALL DIAMETER: 16.8 MILLIMETERS NOMINAL MM
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A568,STRIP,KILLED,COMP 1040-1050 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
SURFACE TREATMENT: PHOSPHATE OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: STEEL OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-P-16232,TYPE M,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
OVERALL DIAMETER16.8 MILLIMETERS NOMINAL MM
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A568,STRIP,KILLED,COMP 1040-1050 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
SURFACE TREATMENTPHOSPHATE OVERALL
PERIPHERAL SHAPE STYLEROUND
MATERIALSTEEL OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER11.0 MILLIMETERS NOMINAL MM
THICKNESS4.0 MILLIMETERS NOMINAL MM
SUBSTITUTES & CROSS-REFERENCES 2
3602019080Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
87XD1030Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 12597078?
12597078 is a WASHER,FLAT.
What parts can replace 12597078?
There are 2 known substitutes for 12597078: 3602019080, 87XD1030. Substitute compatibility should be verified for your specific system.
What is the NSN for 12597078?
12597078 is cataloged in the U.S. Government catalog under NSN 5310-01-251-9734. 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.