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A51H10573-11 — WASHER,RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

A51H10573-11: WASHER,RECESSED.

The WASHER,RECESSED is a the manufacturer industrial component. Key specifications include material: PLASTIC POLYCAPROLACTAM OR PLASTIC POLYHEXAMETHYLENE AMIDE OVERALL, hole_diameter: 0.3730 INCHES MINIMUM AND 0.3735 INCHES MAXIMUM IN, outside_diameter: 0.548 INCHES MINIMUM AND 0.549 INCHES MAXIMUM IN, style_designator: RECESSED BOTH SIDES, top_recess_angle: 90.0 DEGREES NOMINAL, material_thickness: 0.100 INCHES MINIMUM AND 0.105 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-082-8230, 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
A51H10573-11
NSN: 5310-00-082-8230
FSC: 5310 — Nuts and Washers
CAGE: 79RG9 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialPLASTIC POLYCAPROLACTAM OR PLASTIC POLYHEXAMETHYLENE AMIDE OVERALL
hole_diameter0.3730 INCHES MINIMUM AND 0.3735 INCHES MAXIMUM IN
outside_diameter0.548 INCHES MINIMUM AND 0.549 INCHES MAXIMUM IN
style_designatorRECESSED BOTH SIDES
top_recess_angle90.0 DEGREES NOMINAL
material_thickness0.100 INCHES MINIMUM AND 0.105 INCHES MAXIMUM IN
bottom_recess_angle90.0 DEGREES NOMINAL
top_recess_diameter0.421 INCHES MAXIMUM IN
bottom_recess_diameter0.421 INCHES MAXIMUM IN
material_document_and_classificationMIL-M-20693 MIL SPEC ALL MATERIAL RESPONSES OVERALL
NSN5310-00-082-8230
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: A51H10573-11 · 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
•
TOP RECESS DIAMETER: 0.421 INCHES MAXIMUM IN
•
BOTTOM RECESS DIAMETER: 0.421 INCHES MAXIMUM IN
•
TOP RECESS ANGLE: 90.0 DEGREES NOMINAL
•
STYLE DESIGNATOR: RECESSED BOTH SIDES
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-M-20693 MIL SPEC ALL MATERIAL RESPONSES OVERALL
•
OUTSIDE DIAMETER: 0.548 INCHES MINIMUM AND 0.549 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.100 INCHES MINIMUM AND 0.105 INCHES MAXIMUM IN
•
BOTTOM RECESS ANGLE: 90.0 DEGREES NOMINAL
TECHNICAL CHARACTERISTICS
TOP RECESS DIAMETER0.421 INCHES MAXIMUM IN
BOTTOM RECESS DIAMETER0.421 INCHES MAXIMUM IN
TOP RECESS ANGLE90.0 DEGREES NOMINAL
STYLE DESIGNATORRECESSED BOTH SIDES
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-M-20693 MIL SPEC ALL MATERIAL RESPONSES OVERALL
OUTSIDE DIAMETER0.548 INCHES MINIMUM AND 0.549 INCHES MAXIMUM IN
MATERIAL THICKNESS0.100 INCHES MINIMUM AND 0.105 INCHES MAXIMUM IN
BOTTOM RECESS ANGLE90.0 DEGREES NOMINAL
MATERIALPLASTIC POLYCAPROLACTAM OR PLASTIC POLYHEXAMETHYLENE AMIDE OVERALL
HOLE DIAMETER0.3730 INCHES MINIMUM AND 0.3735 INCHES MAXIMUM 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: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is A51H10573-11?
A51H10573-11 is a WASHER,RECESSED.
What is the NSN for A51H10573-11?
A51H10573-11 is cataloged in the U.S. Government catalog under NSN 5310-00-082-8230. 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.