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AHO88255 — WASHER,RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

AHO88255: WASHER,RECESSED.

The WASHER,RECESSED is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, recess_angle: 90.0 DEGREES NOMINAL, hole_diameter: 0.490 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN, recess_diameter: 0.520 INCHES MINIMUM AND 0.540 INCHES MAXIMUM IN, outside_diameter: 0.875 INCHES NOMINAL IN, style_designator: RECESSED. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-178-7420, 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
AHO88255
NSN: 5310-01-178-7420
FSC: 5310 — Nuts and Washers
CAGE: K1037 — MEGGITT AEROSPACE LIMITED (GBR)
SPECIFICATIONS
materialSTEEL OVERALL
recess_angle90.0 DEGREES NOMINAL
hole_diameter0.490 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
recess_diameter0.520 INCHES MINIMUM AND 0.540 INCHES MAXIMUM IN
outside_diameter0.875 INCHES NOMINAL IN
style_designatorRECESSED
material_thickness0.026 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN
material_document_and_classificationDS186-D87 BS1449-321S12,FSCM K1037 MFR REF SINGLE MATERIAL RESPONSE OR DS186-D87 BS970-321S12,FSCM K1037 MFR REF SINGLE MATERIAL RESPONSE OVERALL
NSN5310-01-178-7420
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: AHO88255 · 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
•
STYLE DESIGNATOR: RECESSED
•
MATERIAL DOCUMENT AND CLASSIFICATION: DS186-D87 BS1449-321S12,FSCM K1037 MFR REF SINGLE MATERIAL RESPONSE OR DS186-D87 BS970-321S12,FSCM K1037 MFR REF SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.875 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.026 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN
•
RECESS DIAMETER: 0.520 INCHES MINIMUM AND 0.540 INCHES MAXIMUM IN
•
MATERIAL: STEEL OVERALL
•
HOLE DIAMETER: 0.490 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
•
RECESS ANGLE: 90.0 DEGREES NOMINAL
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORRECESSED
MATERIAL DOCUMENT AND CLASSIFICATIONDS186-D87 BS1449-321S12,FSCM K1037 MFR REF SINGLE MATERIAL RESPONSE OR DS186-D87 BS970-321S12,FSCM K1037 MFR REF SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.875 INCHES NOMINAL IN
MATERIAL THICKNESS0.026 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN
RECESS DIAMETER0.520 INCHES MINIMUM AND 0.540 INCHES MAXIMUM IN
MATERIALSTEEL OVERALL
HOLE DIAMETER0.490 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
RECESS ANGLE90.0 DEGREES NOMINAL
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 AHO88255?
AHO88255 is a WASHER,RECESSED.
What is the NSN for AHO88255?
AHO88255 is cataloged in the U.S. Government catalog under NSN 5310-01-178-7420. 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.