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Technical Data Sheet
PartsTable / COMPONENT / MIL-W-1085
MIL-W-1085 ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include component_quantity: 400. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-012-0391, 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
MIL-W-1085
NSN: 5310-00-012-0391
FSC: 5310
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
component_quantity400
NSN5310-00-012-0391
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MIL-W-1085 · 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
•
CENTER HOLE SHAPE STYLE: ROUND
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-634 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
NONDEFINITIVE SPEC/STD DATA: A TYPE
•
MATERIAL: STEEL COMP 1010 OVERALL
•
DEPARTURE FROM CITED DOCUMENT: AS MOD BY SURF
•
SURFACE TREATMENT: CADMIUM OR ZINC OVERALL
•
THICKNESS: 0.049 INCHES NOMINAL IN
•
PERIPHERAL SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS (FLIS)
CENTER HOLE SHAPE STYLEROUND
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-634 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NONDEFINITIVE SPEC/STD DATAA TYPE
MATERIALSTEEL COMP 1010 OVERALL
DEPARTURE FROM CITED DOCUMENTAS MOD BY SURF
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
THICKNESS0.049 INCHES NOMINAL IN
PERIPHERAL SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
HOLE DIAMETER0.218 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 27
P103Interchangeable
interchangeable cross-reference
interchangeable
347462Interchangeable
interchangeable cross-reference
interchangeable
BEBX1M1Interchangeable
interchangeable cross-reference
interchangeable
FFW92TYPEAGRADE1CLASSASIZE10Interchangeable
interchangeable cross-reference
interchangeable
5310PL0656425Interchangeable
interchangeable cross-reference
interchangeable
MS27183-42Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MIL-W-1085?
MIL-W-1085 is a WASHER,FLAT.
What parts can replace MIL-W-1085?
There are 27 known substitutes for MIL-W-1085: P103, 347462, BEBX1M1 and 24 more. Substitute compatibility should be verified for your specific system.
Is MIL-W-1085 still available?
MIL-W-1085 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026