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HR308 — WASHER,FINISHING

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

HR308: WASHER,FINISHING.

The WASHER,FINISHING is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2024 OVERALL, recess_angle: 100.0 DEGREES NOMINAL, hole_diameter: 0.187 INCHES NOMINAL IN, overall_height: 0.125 INCHES NOMINAL IN, recess_diameter: 0.325 INCHES NOMINAL IN, outside_diameter: 0.719 INCHES MINIMUM AND 0.781 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-596-0355, 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
HR308
NSN: 5310-00-596-0355
FSC: 5310 — Nuts and Washers
CAGE: 13020 — H AND R TOOL AND MACHINE CO (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2024 OVERALL
recess_angle100.0 DEGREES NOMINAL
hole_diameter0.187 INCHES NOMINAL IN
overall_height0.125 INCHES NOMINAL IN
recess_diameter0.325 INCHES NOMINAL IN
outside_diameter0.719 INCHES MINIMUM AND 0.781 INCHES MAXIMUM IN
style_designatorFINISHING
material_thickness0.032 INCHES NOMINAL IN
material_document_and_classificationQQ-A-250/5 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-596-0355
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: HR308 · 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: FINISHING
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-250/5 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.719 INCHES MINIMUM AND 0.781 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.032 INCHES NOMINAL IN
•
RECESS DIAMETER: 0.325 INCHES NOMINAL IN
•
MATERIAL: ALUMINUM ALLOY 2024 OVERALL
•
HOLE DIAMETER: 0.187 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.125 INCHES NOMINAL IN
STYLE DESIGNATORFINISHING
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-250/5 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.719 INCHES MINIMUM AND 0.781 INCHES MAXIMUM IN
MATERIAL THICKNESS0.032 INCHES NOMINAL IN
RECESS DIAMETER0.325 INCHES NOMINAL IN
MATERIALALUMINUM ALLOY 2024 OVERALL
HOLE DIAMETER0.187 INCHES NOMINAL IN
RECESS ANGLE100.0 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 1
0600052Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 HR308?
HR308 is a WASHER,FINISHING.
What parts can replace HR308?
There is 1 known substitute for HR308: 0600052. Substitute compatibility should be verified for your specific system.
What is the NSN for HR308?
HR308 is cataloged in the U.S. Government catalog under NSN 5310-00-596-0355. 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.