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HS4244C9 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

HS4244C9: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, thickness: 0.071 INCHES MINIMUM AND 0.085 INCHES MAXIMUM IN, hole_diameter: 0.564 INCHES MINIMUM AND 0.568 INCHES MAXIMUM IN, hardness_rating: 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM, overall_diameter: 0.958 INCHES MINIMUM AND 0.978 INCHES MAXIMUM IN, special_features: COUNTERSUNK FLAT WASHER HAS CHAMFER DIAMETER OF 0.689 IN IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-615-2545, 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
HS4244C9
NSN: 5310-01-615-2545
FSC: 5310 — Nuts and Washers
CAGE: 8V613 — THE BOEING COMPANY (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thickness0.071 INCHES MINIMUM AND 0.085 INCHES MAXIMUM IN
hole_diameter0.564 INCHES MINIMUM AND 0.568 INCHES MAXIMUM IN
hardness_rating39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM
overall_diameter0.958 INCHES MINIMUM AND 0.978 INCHES MAXIMUM IN
special_featuresCOUNTERSUNK FLAT WASHER HAS CHAMFER DIAMETER OF 0.689 IN IN
surface_treatmentCADMIUM OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
end_item_identification7-610000000-1
cross-sectional_shape_styleRECTANGULAR
inside_left_corner_chamfer_angle44.5 DEGREES MINIMUM AND 45.5 DEGREES MAXIMUM
NSN5310-01-615-2545
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: HS4244C9 · 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: QQ-P-416 TYPE 1 CLASS 3 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
•
OVERALL DIAMETER: 0.958 INCHES MINIMUM AND 0.978 INCHES MAXIMUM IN
•
HARDNESS RATING: 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-18729 MIL STD SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
INSIDE LEFT CORNER CHAMFER ANGLE: 44.5 DEGREES MINIMUM AND 45.5 DEGREES MAXIMUM
•
SURFACE TREATMENT: CADMIUM OVERALL
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416 TYPE 1 CLASS 3 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
OVERALL DIAMETER0.958 INCHES MINIMUM AND 0.978 INCHES MAXIMUM IN
HARDNESS RATING39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-18729 MIL STD SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
INSIDE LEFT CORNER CHAMFER ANGLE44.5 DEGREES MINIMUM AND 45.5 DEGREES MAXIMUM
SPECIAL FEATURESCOUNTERSUNK FLAT WASHER HAS CHAMFER DIAMETER OF 0.689 IN IN
SURFACE TREATMENTCADMIUM OVERALL
PERIPHERAL SHAPE STYLEROUND
PART NAME ASSIGNED BY CONTROLLING AGENCYWASHER,CLOSE TOLERANCE
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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is HS4244C9?
HS4244C9 is a WASHER,FLAT.
What is the NSN for HS4244C9?
HS4244C9 is cataloged in the U.S. Government catalog under NSN 5310-01-615-2545. 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.