PartsTable
Technical Data Sheet
Download PDF

B4826-31 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

B4826-31: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include hole_diameter: 6.389 INCHES MINIMUM AND 6.424 INCHES MAXIMUM IN, outside_diameter: 7.438 INCHES MINIMUM AND 7.498 INCHES MAXIMUM IN, style_designator: KEY, material_thickness: 0.156 INCHES NOMINAL IN, external_key_quantity: 19, external_prebent_key_width: 0.480 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-186-0986, 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
B4826-31
NSN: 5310-00-186-0986
FSC: 5310 — Nuts and Washers
CAGE: 08018 — BORG-WARNER CORP (USA)
SPECIFICATIONS
hole_diameter6.389 INCHES MINIMUM AND 6.424 INCHES MAXIMUM IN
outside_diameter7.438 INCHES MINIMUM AND 7.498 INCHES MAXIMUM IN
style_designatorKEY
material_thickness0.156 INCHES NOMINAL IN
external_key_quantity19
external_prebent_key_width0.480 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN
internal_prebent_key_width0.500 INCHES MINIMUM AND 0.590 INCHES MAXIMUM IN
internal_prebent_key_length0.313 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
overall_distance_including_keys8.438 INCHES NOMINAL IN
material_document_and_classification66 FED STD ALL MATERIAL RESPONSES OVERALL
NSN5310-00-186-0986
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: B4826-31 · 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
•
INTERNAL PREBENT KEY WIDTH: 0.500 INCHES MINIMUM AND 0.590 INCHES MAXIMUM IN
•
OVERALL DISTANCE INCLUDING KEYS: 8.438 INCHES NOMINAL IN
•
STYLE DESIGNATOR: KEY
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD ALL MATERIAL RESPONSES OVERALL
•
OUTSIDE DIAMETER: 7.438 INCHES MINIMUM AND 7.498 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.156 INCHES NOMINAL IN
•
EXTERNAL KEY QUANTITY: 19
•
INTERNAL PREBENT KEY LENGTH: 0.313 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
INTERNAL PREBENT KEY WIDTH0.500 INCHES MINIMUM AND 0.590 INCHES MAXIMUM IN
OVERALL DISTANCE INCLUDING KEYS8.438 INCHES NOMINAL IN
STYLE DESIGNATORKEY
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
OUTSIDE DIAMETER7.438 INCHES MINIMUM AND 7.498 INCHES MAXIMUM IN
MATERIAL THICKNESS0.156 INCHES NOMINAL IN
EXTERNAL KEY QUANTITY19
INTERNAL PREBENT KEY LENGTH0.313 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
EXTERNAL PREBENT KEY WIDTH0.480 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN
MATERIALSTEEL COMP 1005 OR STEEL COMP 1006 OR STEEL COMP 1008 OR STEEL COMP 1010 OR STEEL COMP 1011 OR STEEL COMP 1012 OR STEEL COMP 1013 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OR STEEL COMP 1021 OR STEEL COMP 1022 OR STEEL COMP 1026 OR STEEL COMP 1527 OR STEEL COMP 1029 OR STEEL COMP 1030 OR STEEL COMP 1031 OR STEEL COMP 1033 OR STEEL COMP 1034 OR STEEL COMP 1035 OVERALL
SUBSTITUTES & CROSS-REFERENCES 8
W32Reference document
Same NSN cross-reference
Reference document — Secondary reference
124A4935AA032Reference document
Same NSN cross-reference
Reference document — Secondary reference
801491-596Reference document
Same NSN cross-reference
Reference document — Secondary reference
801490PC596Reference document
Same NSN cross-reference
Reference document — Secondary reference
MILW21338TYPE1CLASS1SIZE32Reference document
Same NSN cross-reference
Reference document — Identification reference
WW8443143PC20Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
Ready to buy B4826-31?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is B4826-31?
B4826-31 is a WASHER,KEY.
What parts can replace B4826-31?
There are 8 known substitutes for B4826-31: W32, 124A4935AA032, 801491-596 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for B4826-31?
B4826-31 is cataloged in the U.S. Government catalog under NSN 5310-00-186-0986. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — B4826-31

✓ 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.