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12449994 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

12449994: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include length: 1.800 INCHES MINIMUM AND 2.000 INCHES MAXIMUM IN, material: STEEL OVERALL, thickness: 0.120 INCHES NOMINAL IN, hole_diameter: 0.390 INCHES MINIMUM AND 0.430 INCHES MAXIMUM IN, width_across_flats: 0.840 INCHES MINIMUM AND 0.900 INCHES MAXIMUM IN, peripheral_shape_style: RECTANGULAR. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-482-9306, 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
12449994
NSN: 5310-01-482-9306
FSC: 5310 — Nuts and Washers
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
length1.800 INCHES MINIMUM AND 2.000 INCHES MAXIMUM IN
materialSTEEL OVERALL
thickness0.120 INCHES NOMINAL IN
hole_diameter0.390 INCHES MINIMUM AND 0.430 INCHES MAXIMUM IN
width_across_flats0.840 INCHES MINIMUM AND 0.900 INCHES MAXIMUM IN
peripheral_shape_styleRECTANGULAR
center_hole_shape_styleROUND
end_item_identification2330-01-387-5424;CHASSIS,TRAILER
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationASTM A570,GR 33 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-01-482-9306
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 12449994 · 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: 0.840 INCHES MINIMUM AND 0.900 INCHES MAXIMUM IN
•
LENGTH: 1.800 INCHES MINIMUM AND 2.000 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A570,GR 33 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
PERIPHERAL SHAPE STYLE: RECTANGULAR
•
MATERIAL: STEEL OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.840 INCHES MINIMUM AND 0.900 INCHES MAXIMUM IN
LENGTH1.800 INCHES MINIMUM AND 2.000 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A570,GR 33 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
PERIPHERAL SHAPE STYLERECTANGULAR
END ITEM IDENTIFICATION2330-01-387-5424;CHASSIS,TRAILER
MATERIALSTEEL OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.390 INCHES MINIMUM AND 0.430 INCHES MAXIMUM IN
THICKNESS0.120 INCHES NOMINAL IN
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 12449994?
12449994 is a WASHER,FLAT.
What is the NSN for 12449994?
12449994 is cataloged in the U.S. Government catalog under NSN 5310-01-482-9306. 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.