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8-51057 — WASHER,RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

8-51057: WASHER,RECESSED.

The WASHER,RECESSED is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY OVERALL, recess_angle: 90.0 DEGREES NOMINAL, hole_diameter: 1.030 INCHES NOMINAL IN, heat_treatment: T-4 SOLUTION HEAT TREATED, NATURAL AGED, recess_diameter: 1.190 INCHES NOMINAL IN, outside_diameter: 1.320 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-802-5906, 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
8-51057
NSN: 5310-00-802-5906
NIINs: 008025906, 012005850
FSC: 5310 — Nuts and Washers
CAGE: 15090 — RAYTHEON COMPANY (USA)
SPECIFICATIONS
materialALUMINUM ALLOY OVERALL
recess_angle90.0 DEGREES NOMINAL
hole_diameter1.030 INCHES NOMINAL IN
heat_treatmentT-4 SOLUTION HEAT TREATED, NATURAL AGED
recess_diameter1.190 INCHES NOMINAL IN
outside_diameter1.320 INCHES NOMINAL IN
style_designatorRECESSED
material_thickness0.125 INCHES NOMINAL IN
material_document_and_classificationQQ-A-267 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-802-5906
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 8-51057 · 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
•
HEAT TREATMENT: T-4 SOLUTION HEAT TREATED, NATURAL AGED
•
STYLE DESIGNATOR: RECESSED
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-267 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 1.320 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.125 INCHES NOMINAL IN
•
RECESS DIAMETER: 1.190 INCHES NOMINAL IN
•
MATERIAL: ALUMINUM ALLOY OVERALL
•
HOLE DIAMETER: 1.030 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
HEAT TREATMENTT-4 SOLUTION HEAT TREATED, NATURAL AGED
STYLE DESIGNATORRECESSED
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-267 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER1.320 INCHES NOMINAL IN
MATERIAL THICKNESS0.125 INCHES NOMINAL IN
RECESS DIAMETER1.190 INCHES NOMINAL IN
MATERIALALUMINUM ALLOY OVERALL
HOLE DIAMETER1.030 INCHES NOMINAL IN
RECESS ANGLE90.0 DEGREES NOMINAL
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 8-51057?
8-51057 is a WASHER,RECESSED.
What is the NSN for 8-51057?
8-51057 is cataloged in the U.S. Government catalog under NSN 5310-00-802-5906. 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.