PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 1ES12766
1ES12766 ✓ 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 KEY,WOODRUFF is a the manufacturer industrial component. Key specifications include material: STEEL COMP 2330 OR STEEL COMP 2340 OVERALL, thickness: 0.312 INCHES NOMINAL IN, key_height: 0.433 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN, circle_diameter: 1.000 INCHES NOMINAL IN, hardness_rating: 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL, style_designator: ROUND BOTTOM. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-012-4554, 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
1ES12766
NSN: 5315-00-012-4554
FSC: 5315
CAGE: 78500 — MERITOR HEAVY VEHICLE SYSTEMS, LLC (USA)
SPECIFICATIONS
materialSTEEL COMP 2330 OR STEEL COMP 2340 OVERALL
thickness0.312 INCHES NOMINAL IN
key_height0.433 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
circle_diameter1.000 INCHES NOMINAL IN
hardness_rating40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
style_designatorROUND BOTTOM
starting_edge_shapeSTRAIGHT
key_size_designationWOODRUFF B
material_document_and_classificationQQ-S-624 FED SPEC ALL MATERIAL RESPONSES OVERALL
NSN5315-00-012-4554
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1ES12766 · 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
•
KEY SIZE DESIGNATION: WOODRUFF B
•
STYLE DESIGNATOR: ROUND BOTTOM
•
CIRCLE DIAMETER: 1.000 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 2330 OR STEEL COMP 2340 OVERALL
•
KEY HEIGHT: 0.433 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
•
STARTING EDGE SHAPE: STRAIGHT
•
HARDNESS RATING: 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-624 FED SPEC ALL MATERIAL RESPONSES OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
KEY SIZE DESIGNATIONWOODRUFF B
STYLE DESIGNATORROUND BOTTOM
CIRCLE DIAMETER1.000 INCHES NOMINAL IN
MATERIALSTEEL COMP 2330 OR STEEL COMP 2340 OVERALL
KEY HEIGHT0.433 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
STARTING EDGE SHAPESTRAIGHT
HARDNESS RATING40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-624 FED SPEC ALL MATERIAL RESPONSES OVERALL
THICKNESS0.312 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
117977Interchangeable
interchangeable cross-reference
interchangeable
4565AInterchangeable
interchangeable cross-reference
interchangeable
400-73Interchangeable
interchangeable cross-reference
interchangeable
892101Interchangeable
interchangeable cross-reference
interchangeable
892102Interchangeable
interchangeable cross-reference
interchangeable
07-124552Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy 1ES12766?
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 1ES12766?
1ES12766 is a KEY,WOODRUFF.
What parts can replace 1ES12766?
There are 18 known substitutes for 1ES12766: 117977, 4565A, 400-73 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1ES12766?
1ES12766 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-012-4554. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 1ES12766

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026