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PartsTable / COMPONENT / AN280H405
AN280H405 ✓ 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 8630 OVERALL, thickness: 0.125 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN, key_height: 0.245 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN, circle_diameter: 0.625 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN, hardness_rating: 26.0 ROCKWELL C MINIMUM AND 33.0 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 5315-00-230-6238, 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
AN280H405
NSN: 5315-00-230-6238
FSC: 5315
CAGE: 88044 — AERONAUTICAL STANDARDS GROUP DEPT OF NAVY AND AIR FORCE (USA)
SPECIFICATIONS
materialSTEEL COMP 8630 OVERALL
thickness0.125 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
key_height0.245 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
circle_diameter0.625 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
hardness_rating26.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM OVERALL
style_designatorROUND BOTTOM
starting_edge_shapeROUND
key_size_designationWOODRUFF 5
starting_edge_radius0.008 INCHES MINIMUM AND 0.012 INCHES MAXIMUM IN
material_document_and_classificationMIL-S-6050 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5315-00-230-6238
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: AN280H405 · 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
•
KEY HEIGHT: 0.245 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
•
THICKNESS: 0.125 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
•
CIRCLE DIAMETER: 0.625 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
•
KEY SIZE DESIGNATION: WOODRUFF 5
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-6050 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
STARTING EDGE RADIUS: 0.008 INCHES MINIMUM AND 0.012 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: ROUND BOTTOM
TECHNICAL CHARACTERISTICS (FLIS)
STARTING EDGE SHAPEROUND
KEY HEIGHT0.245 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
THICKNESS0.125 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
CIRCLE DIAMETER0.625 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
KEY SIZE DESIGNATIONWOODRUFF 5
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-6050 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
STARTING EDGE RADIUS0.008 INCHES MINIMUM AND 0.012 INCHES MAXIMUM IN
STYLE DESIGNATORROUND BOTTOM
HARDNESS RATING26.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM OVERALL
MATERIALSTEEL COMP 8630 OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
2709Interchangeable
interchangeable cross-reference
interchangeable
N1809Interchangeable
interchangeable cross-reference
interchangeable
271731-8Interchangeable
interchangeable cross-reference
interchangeable
2984PC63Interchangeable
interchangeable cross-reference
interchangeable
S6101-3121465PC63Interchangeable
interchangeable cross-reference
interchangeable
S6101-3121462PC6Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AN280H405?
AN280H405 is a KEY,WOODRUFF.
What parts can replace AN280H405?
There are 20 known substitutes for AN280H405: 2709, N1809, 271731-8 and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AN280H405?
AN280H405 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-230-6238. 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