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12339599 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

12339599: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1035 OR STEEL COMP 1040 OR STEEL COMP 1045 OR STEEL COMP 1050 OVERALL, thickness: 0.060 INCHES NOMINAL IN, hole_diameter: 0.781 INCHES NOMINAL IN, heat_treatment: QUENCHED AND TEMPERED, hardness_rating: 30.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM, overall_diameter: 1.250 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-197-1100, 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
12339599
NSN: 5310-01-197-1100
FSC: 5310 — Nuts and Washers
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
materialSTEEL COMP 1035 OR STEEL COMP 1040 OR STEEL COMP 1045 OR STEEL COMP 1050 OVERALL
thickness0.060 INCHES NOMINAL IN
hole_diameter0.781 INCHES NOMINAL IN
heat_treatmentQUENCHED AND TEMPERED
hardness_rating30.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM
overall_diameter1.250 INCHES NOMINAL IN
surface_treatmentCADMIUM AND CHROMATE OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationASTM A682 ASSN STD ALL MATERIAL RESPONSES OVERALL
surface_treatment_document_and_classificationASTM A165,TY TS ASSN STD SINGLE TREATMENT RESPONSE OVERALL
NSN5310-01-197-1100
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 12339599 · 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: ASTM A165,TY TS ASSN STD SINGLE TREATMENT RESPONSE OVERALL
•
OVERALL DIAMETER: 1.250 INCHES NOMINAL IN
•
HEAT TREATMENT: QUENCHED AND TEMPERED
•
HARDNESS RATING: 30.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A682 ASSN STD ALL MATERIAL RESPONSES OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONASTM A165,TY TS ASSN STD SINGLE TREATMENT RESPONSE OVERALL
OVERALL DIAMETER1.250 INCHES NOMINAL IN
HEAT TREATMENTQUENCHED AND TEMPERED
HARDNESS RATING30.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A682 ASSN STD ALL MATERIAL RESPONSES OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
PERIPHERAL SHAPE STYLEROUND
MATERIALSTEEL COMP 1035 OR STEEL COMP 1040 OR STEEL COMP 1045 OR STEEL COMP 1050 OVERALL
CENTER HOLE SHAPE STYLEROUND
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 2
5574374Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
5310PL0806419Reference document
Same NSN cross-reference
Reference document — Informative reference only
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 12339599?
12339599 is a WASHER,FLAT.
What parts can replace 12339599?
There are 2 known substitutes for 12339599: 5574374, 5310PL0806419. Substitute compatibility should be verified for your specific system.
What is the NSN for 12339599?
12339599 is cataloged in the U.S. Government catalog under NSN 5310-01-197-1100. 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.