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Technical Data Sheet
PartsTable / COMPONENT / 1B8720
1B8720 ✓ 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: 0.250 INCHES NOMINAL IN, key_height: 0.589 INCHES MINIMUM AND 0.594 INCHES MAXIMUM IN, circle_diameter: 1.375 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 5315-00-011-7993, 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
1B8720
NSN: 5315-00-011-7993
FSC: 5315
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
materialSTEEL COMP 2330 OR STEEL COMP 2340 OVERALL
thickness0.250 INCHES NOMINAL IN
key_height0.589 INCHES MINIMUM AND 0.594 INCHES MAXIMUM IN
circle_diameter1.375 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 22
material_document_and_classificationQQ-S-624 FED SPEC ALL MATERIAL RESPONSES OVERALL
NSN5315-00-011-7993
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1B8720 · 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
•
THICKNESS: 0.250 INCHES NOMINAL IN
•
STYLE DESIGNATOR: ROUND BOTTOM
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-624 FED SPEC ALL MATERIAL RESPONSES OVERALL
•
KEY HEIGHT: 0.589 INCHES MINIMUM AND 0.594 INCHES MAXIMUM IN
•
HARDNESS RATING: 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
•
STARTING EDGE SHAPE: STRAIGHT
•
MATERIAL: STEEL COMP 2330 OR STEEL COMP 2340 OVERALL
•
CIRCLE DIAMETER: 1.375 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
THICKNESS0.250 INCHES NOMINAL IN
STYLE DESIGNATORROUND BOTTOM
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-624 FED SPEC ALL MATERIAL RESPONSES OVERALL
KEY HEIGHT0.589 INCHES MINIMUM AND 0.594 INCHES MAXIMUM IN
HARDNESS RATING40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
STARTING EDGE SHAPESTRAIGHT
MATERIALSTEEL COMP 2330 OR STEEL COMP 2340 OVERALL
CIRCLE DIAMETER1.375 INCHES NOMINAL IN
KEY SIZE DESIGNATIONWOODRUFF 22
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
7435-98DInterchangeable
interchangeable cross-reference
interchangeable
87Interchangeable
interchangeable cross-reference
interchangeable
119294Interchangeable
interchangeable cross-reference
interchangeable
1179-93Interchangeable
interchangeable cross-reference
interchangeable
PL87Interchangeable
Same NIIN cross-reference
interchangeable
42-5416-500-470Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1B8720?
1B8720 is a KEY,WOODRUFF.
What parts can replace 1B8720?
There are 6 known substitutes for 1B8720: 7435-98D, 87, 119294 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1B8720?
1B8720 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-011-7993. 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