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6862921 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

6862921: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL COMP 420 OVERALL, thickness: 0.070 INCHES MINIMUM AND 0.075 INCHES MAXIMUM IN, hole_diameter: 0.260 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN, hardness_rating: 207.0 BRINELL STANDARD MINIMUM AND 235.0 BRINELL STANDARD MAXIMUM, overall_diameter: 0.547 INCHES MINIMUM AND 0.550 INCHES MAXIMUM IN, peripheral_shape_style: ROUND. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-449-3020, 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
6862921
NSN: 5310-00-449-3020
FSC: 5310 — Nuts and Washers
CAGE: 73342 — ALLISON TRANSMISSION INC DBA ALLISON TRANSMISSION, INC (USA)
SPECIFICATIONS
materialSTEEL COMP 420 OVERALL
thickness0.070 INCHES MINIMUM AND 0.075 INCHES MAXIMUM IN
hole_diameter0.260 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN
hardness_rating207.0 BRINELL STANDARD MINIMUM AND 235.0 BRINELL STANDARD MAXIMUM
overall_diameter0.547 INCHES MINIMUM AND 0.550 INCHES MAXIMUM IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationAMS 5621 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-449-3020
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 6862921 · 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
•
OVERALL DIAMETER: 0.547 INCHES MINIMUM AND 0.550 INCHES MAXIMUM IN
•
HARDNESS RATING: 207.0 BRINELL STANDARD MINIMUM AND 235.0 BRINELL STANDARD MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5621 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: STEEL COMP 420 OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 0.260 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER0.547 INCHES MINIMUM AND 0.550 INCHES MAXIMUM IN
HARDNESS RATING207.0 BRINELL STANDARD MINIMUM AND 235.0 BRINELL STANDARD MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5621 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
PERIPHERAL SHAPE STYLEROUND
MATERIALSTEEL COMP 420 OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.260 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN
THICKNESS0.070 INCHES MINIMUM AND 0.075 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 1
BR2092Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
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 6862921?
6862921 is a WASHER,FLAT.
What parts can replace 6862921?
There is 1 known substitute for 6862921: BR2092. Substitute compatibility should be verified for your specific system.
What is the NSN for 6862921?
6862921 is cataloged in the U.S. Government catalog under NSN 5310-00-449-3020. 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.