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PartsTable / COMPONENT / 28-085-006
28-085-006 ✓ 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 material: RUBBER SYNTHETIC OVERALL, thickness: 0.125 INCHES NOMINAL IN, hole_diameter: 0.343 INCHES NOMINAL IN, hardness_rating: 60.0 DUROMETER MINIMUM AND 70.0 DUROMETER MAXIMUM, overall_diameter: 0.875 INCHES NOMINAL IN, special_features: 0.030 IN. LG CHAMFER ON TOP OUTSIDE EDGE IN.

This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-052-9165, 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
28-085-006
NSN: 5310-01-052-9165
FSC: 5310
CAGE: 07464 — BADGER FIRE PROTECTION INC (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC OVERALL
thickness0.125 INCHES NOMINAL IN
hole_diameter0.343 INCHES NOMINAL IN
hardness_rating60.0 DUROMETER MINIMUM AND 70.0 DUROMETER MAXIMUM
overall_diameter0.875 INCHES NOMINAL IN
special_features0.030 IN. LG CHAMFER ON TOP OUTSIDE EDGE IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
NSN5310-01-052-9165
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 28-085-006 · 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
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
MATERIAL: RUBBER SYNTHETIC OVERALL
•
OVERALL DIAMETER: 0.875 INCHES NOMINAL IN
•
PERIPHERAL SHAPE STYLE: ROUND
•
CENTER HOLE SHAPE STYLE: ROUND
•
HARDNESS RATING: 60.0 DUROMETER MINIMUM AND 70.0 DUROMETER MAXIMUM
•
THICKNESS: 0.125 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
MATERIALRUBBER SYNTHETIC OVERALL
OVERALL DIAMETER0.875 INCHES NOMINAL IN
SPECIAL FEATURES0.030 IN. LG CHAMFER ON TOP OUTSIDE EDGE IN
PERIPHERAL SHAPE STYLEROUND
CENTER HOLE SHAPE STYLEROUND
HARDNESS RATING60.0 DUROMETER MINIMUM AND 70.0 DUROMETER MAXIMUM
THICKNESS0.125 INCHES NOMINAL IN
HOLE DIAMETER0.343 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
G111Interchangeable
interchangeable cross-reference
interchangeable
52381Interchangeable
interchangeable cross-reference
interchangeable
975-0002-001Interchangeable
interchangeable cross-reference
interchangeable
236Interchangeable
interchangeable cross-reference
interchangeable
50561Interchangeable
interchangeable cross-reference
interchangeable
100420Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 28-085-006?
28-085-006 is a WASHER,FLAT.
What parts can replace 28-085-006?
There are 9 known substitutes for 28-085-006: G111, 52381, 975-0002-001 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 28-085-006?
28-085-006 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-052-9165. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026