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544803 — WASHER,SHOULDERED AND RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

544803: WASHER,SHOULDERED AND RECESSED.

The WASHER,SHOULDERED AND RECESSED is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2024 OVERALL, recess_angle: 90.0 DEGREES NOMINAL, hole_diameter: 0.953 INCHES NOMINAL IN, hardness_rating: 61.5 ROCKWELL SUPERFICIAL 30-T MINIMUM, recess_diameter: 1.118 INCHES NOMINAL IN, shoulder_height: 0.055 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-950-8791, 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
544803
NSN: 5310-00-950-8791
FSC: 5310 — Nuts and Washers
CAGE: 73030 — HAMILTON SUNDSTRAND CORPORATION DBA COLLINS AEROSPACE (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2024 OVERALL
recess_angle90.0 DEGREES NOMINAL
hole_diameter0.953 INCHES NOMINAL IN
hardness_rating61.5 ROCKWELL SUPERFICIAL 30-T MINIMUM
recess_diameter1.118 INCHES NOMINAL IN
shoulder_height0.055 INCHES NOMINAL IN
outside_diameter1.280 INCHES NOMINAL IN
style_designatorSHOULDERED AND RECESSED
shoulder_diameter1.187 INCHES NOMINAL IN
material_thickness0.030 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN
material_document_and_classificationQQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-950-8791
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 544803 · 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
•
SHOULDER HEIGHT: 0.055 INCHES NOMINAL IN
•
HARDNESS RATING: 61.5 ROCKWELL SUPERFICIAL 30-T MINIMUM
•
STYLE DESIGNATOR: SHOULDERED AND RECESSED
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 1.280 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.030 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN
•
SHOULDER DIAMETER: 1.187 INCHES NOMINAL IN
•
RECESS DIAMETER: 1.118 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
SHOULDER HEIGHT0.055 INCHES NOMINAL IN
HARDNESS RATING61.5 ROCKWELL SUPERFICIAL 30-T MINIMUM
STYLE DESIGNATORSHOULDERED AND RECESSED
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER1.280 INCHES NOMINAL IN
MATERIAL THICKNESS0.030 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN
SHOULDER DIAMETER1.187 INCHES NOMINAL IN
RECESS DIAMETER1.118 INCHES NOMINAL IN
MATERIALALUMINUM ALLOY 2024 OVERALL
HOLE DIAMETER0.953 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: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 544803?
544803 is a WASHER,SHOULDERED AND RECESSED.
What is the NSN for 544803?
544803 is cataloged in the U.S. Government catalog under NSN 5310-00-950-8791. 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.