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8626389 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

8626389: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 302 OR STEEL COMP 303 OVERALL, hole_diameter: 0.188 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN, surface_finish: 63.0 MICROINCHES TOP, outside_diameter: 0.300 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN, style_designator: KEY, surface_treatment: PASSIVATE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-177-1302, 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
8626389
NSN: 5310-00-177-1302
FSC: 5310 — Nuts and Washers
CAGE: 19200 — COMBAT CAPABILITIES DEVELOPMENT COMMAND (CCDC) ARMAMENTS CENTER DBA CCDC DIV LOGISTICS RESEARCH AND ENGINEERING DIRECTORATE (USA)
SPECIFICATIONS
materialSTEEL COMP 302 OR STEEL COMP 303 OVERALL
hole_diameter0.188 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
surface_finish63.0 MICROINCHES TOP
outside_diameter0.300 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN
style_designatorKEY
surface_treatmentPASSIVATE OVERALL
material_thickness0.030 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN
external_prebent_key_length0.024 INCHES MINIMUM AND 0.027 INCHES MAXIMUM IN
overall_distance_including_keys0.384 INCHES MINIMUM AND 0.389 INCHES MAXIMUM IN
material_document_and_classificationQQ-S-766 FED SPEC 1ST MATERIAL RESPONSE OR ASTM A582 ASSN STD 2ND MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classification171 FINISH 5.4.1 MIL STD SINGLE TREATMENT RESPONSE OVERALL
distance_from_centerline_to_inside_of_prebent_key0.180 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
NSN5310-00-177-1302
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 8626389 · 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
•
SURFACE FINISH: 63.0 MICROINCHES ALL SURFACES
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: 171 FINISH 5.4.1 MIL STD SINGLE TREATMENT RESPONSE OVERALL
•
DISTANCE FROM CENTERLINE TO INSIDE OF PREBENT KEY: 0.180 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
•
EXTERNAL PREBENT KEY LENGTH: 0.024 INCHES MINIMUM AND 0.027 INCHES MAXIMUM IN
•
OVERALL DISTANCE INCLUDING KEYS: 0.384 INCHES MINIMUM AND 0.389 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: KEY
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-766 FED SPEC 1ST MATERIAL RESPONSE OR ASTM A582 ASSN STD 2ND MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS
SURFACE FINISH63.0 MICROINCHES ALL SURFACES
SURFACE FINISH63.0 MICROINCHES TOP
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION171 FINISH 5.4.1 MIL STD SINGLE TREATMENT RESPONSE OVERALL
DISTANCE FROM CENTERLINE TO INSIDE OF PREBENT KEY0.180 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
EXTERNAL PREBENT KEY LENGTH0.024 INCHES MINIMUM AND 0.027 INCHES MAXIMUM IN
OVERALL DISTANCE INCLUDING KEYS0.384 INCHES MINIMUM AND 0.389 INCHES MAXIMUM IN
STYLE DESIGNATORKEY
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-766 FED SPEC 1ST MATERIAL RESPONSE OR ASTM A582 ASSN STD 2ND MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.300 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN
MATERIAL THICKNESS0.030 INCHES MINIMUM AND 0.031 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: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 8626389?
8626389 is a WASHER,KEY.
What is the NSN for 8626389?
8626389 is cataloged in the U.S. Government catalog under NSN 5310-00-177-1302. 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.