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A51C31524-11 — WASHER,SHOULDERED AND RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

A51C31524-11: WASHER,SHOULDERED AND RECESSED.

The WASHER,SHOULDERED AND RECESSED is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 7075 OVERALL, recess_angle: 90.0 DEGREES NOMINAL, hole_diameter: 1.062 INCHES MINIMUM AND 1.067 INCHES MAXIMUM IN, shoulder_height: 0.105 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN, outside_diameter: 1.562 INCHES NOMINAL IN, style_designator: SHOULDERED AND RECESSED. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-006-0529, 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
A51C31524-11
NSN: 5310-00-006-0529
FSC: 5310 — Nuts and Washers
CAGE: 79RG9 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 7075 OVERALL
recess_angle90.0 DEGREES NOMINAL
hole_diameter1.062 INCHES MINIMUM AND 1.067 INCHES MAXIMUM IN
shoulder_height0.105 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN
outside_diameter1.562 INCHES NOMINAL IN
style_designatorSHOULDERED AND RECESSED
shoulder_diameter1.310 INCHES NOMINAL IN
surface_treatmentANODIZE OVERALL
material_thickness0.125 INCHES NOMINAL IN
material_document_and_classificationQQ-A-225/9,ALLOY 7075,T7351 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-006-0529
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: A51C31524-11 · 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
•
SHOULDER HEIGHT: 0.105 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: SHOULDERED AND RECESSED
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/9,ALLOY 7075,T7351 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 1.562 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.125 INCHES NOMINAL IN
•
SHOULDER DIAMETER: 1.310 INCHES NOMINAL IN
•
SURFACE TREATMENT: ANODIZE OVERALL
•
TEST DATA DOCUMENT: 81349-MIL-I-6866 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
TECHNICAL CHARACTERISTICS
SHOULDER HEIGHT0.105 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN
STYLE DESIGNATORSHOULDERED AND RECESSED
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/9,ALLOY 7075,T7351 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER1.562 INCHES NOMINAL IN
MATERIAL THICKNESS0.125 INCHES NOMINAL IN
SHOULDER DIAMETER1.310 INCHES NOMINAL IN
SURFACE TREATMENTANODIZE OVERALL
TEST DATA DOCUMENT81349-MIL-I-6866 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
MATERIALALUMINUM ALLOY 7075 OVERALL
HOLE DIAMETER1.062 INCHES MINIMUM AND 1.067 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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is A51C31524-11?
A51C31524-11 is a WASHER,SHOULDERED AND RECESSED.
What is the NSN for A51C31524-11?
A51C31524-11 is cataloged in the U.S. Government catalog under NSN 5310-00-006-0529. 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.