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Technical Data Sheet
PartsTable / COMPONENT / 9918156
9918156 ✓ 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 OVERALL, thickness: 0.125 INCHES NOMINAL IN, key_height: 0.190 INCHES NOMINAL IN, circle_diameter: 0.480 INCHES NOMINAL IN, style_designator: FLAT BOTTOM, starting_edge_shape: ROUND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-511-7291, 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
9918156
NSN: 5315-00-511-7291
FSC: 5315
CAGE: 71871 — ALFA LAVAL INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thickness0.125 INCHES NOMINAL IN
key_height0.190 INCHES NOMINAL IN
circle_diameter0.480 INCHES NOMINAL IN
style_designatorFLAT BOTTOM
starting_edge_shapeROUND
key_size_designationWOODRUFF 3
starting_edge_radius0.240 INCHES NOMINAL IN
NSN5315-00-511-7291
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 9918156 · 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
•
STARTING EDGE SHAPE: ROUND
•
MATERIAL: STEEL OVERALL
•
STYLE DESIGNATOR: FLAT BOTTOM
•
THICKNESS: 0.125 INCHES NOMINAL IN
•
CIRCLE DIAMETER: 0.480 INCHES NOMINAL IN
•
KEY HEIGHT: 0.190 INCHES NOMINAL IN
•
STARTING EDGE RADIUS: 0.240 INCHES NOMINAL IN
•
KEY SIZE DESIGNATION: WOODRUFF 3
TECHNICAL CHARACTERISTICS (FLIS)
STARTING EDGE SHAPEROUND
MATERIALSTEEL OVERALL
STYLE DESIGNATORFLAT BOTTOM
THICKNESS0.125 INCHES NOMINAL IN
CIRCLE DIAMETER0.480 INCHES NOMINAL IN
KEY HEIGHT0.190 INCHES NOMINAL IN
STARTING EDGE RADIUS0.240 INCHES NOMINAL IN
KEY SIZE DESIGNATIONWOODRUFF 3
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
MIL-S-15291/7Interchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-15291/7Interchangeable
interchangeable cross-reference
interchangeable
M15291/7-007Interchangeable
interchangeable cross-reference
interchangeable
808-015Interchangeable
interchangeable cross-reference
interchangeable
8156Interchangeable
interchangeable cross-reference
interchangeable
01002011Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 9918156?
9918156 is a KEY,WOODRUFF.
What parts can replace 9918156?
There are 14 known substitutes for 9918156: MIL-S-15291/7, MIL-DTL-15291/7, M15291/7-007 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 9918156?
9918156 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-511-7291. 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