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PartsTable / COMPONENT / 110S20
110S20 ✓ 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 WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1020 OVERALL, hole_diameter: 3.010 INCHES MINIMUM AND 3.015 INCHES MAXIMUM IN, hardness_rating: 55.0 ROCKWELL B MINIMUM AND 70.0 ROCKWELL B MAXIMUM, outside_diameter: 3.615 INCHES MINIMUM AND 3.635 INCHES MAXIMUM IN, style_designator: KEY, surface_treatment: CADMIUM OVERALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-209-2594, 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
110S20
NSN: 5310-00-209-2594
FSC: 5310
CAGE: 55284 — HONEYWELL INTERNATIONAL INC. DBA HONEYWELL DIV AEROSPACE-SOUTH BEND (WESTMOOR ST) (USA)
SPECIFICATIONS
materialSTEEL COMP 1020 OVERALL
hole_diameter3.010 INCHES MINIMUM AND 3.015 INCHES MAXIMUM IN
hardness_rating55.0 ROCKWELL B MINIMUM AND 70.0 ROCKWELL B MAXIMUM
outside_diameter3.615 INCHES MINIMUM AND 3.635 INCHES MAXIMUM IN
style_designatorKEY
surface_treatmentCADMIUM OVERALL
material_thickness0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN
internal_key_quantity1
internal_straight_key_width0.170 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN
material_document_and_classificationSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
distance_from_centerline_to_top_of_internal_key1.376 INCHES MINIMUM AND 1.380 INCHES MAXIMUM IN
NSN5310-00-209-2594
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 110S20 · 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
•
MATERIAL THICKNESS: 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: KEY
•
HOLE DIAMETER: 3.010 INCHES MINIMUM AND 3.015 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
INTERNAL KEY QUANTITY: 1
•
OUTSIDE DIAMETER: 3.615 INCHES MINIMUM AND 3.635 INCHES MAXIMUM IN
•
HARDNESS RATING: 55.0 ROCKWELL B MINIMUM AND 70.0 ROCKWELL B MAXIMUM
•
MATERIAL: STEEL COMP 1020 OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL THICKNESS0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN
STYLE DESIGNATORKEY
HOLE DIAMETER3.010 INCHES MINIMUM AND 3.015 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
INTERNAL KEY QUANTITY1
OUTSIDE DIAMETER3.615 INCHES MINIMUM AND 3.635 INCHES MAXIMUM IN
HARDNESS RATING55.0 ROCKWELL B MINIMUM AND 70.0 ROCKWELL B MAXIMUM
MATERIALSTEEL COMP 1020 OVERALL
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY1.376 INCHES MINIMUM AND 1.380 INCHES MAXIMUM IN
INTERNAL STRAIGHT KEY WIDTH0.170 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
C6908Interchangeable
interchangeable cross-reference
interchangeable
51021Interchangeable
interchangeable cross-reference
interchangeable
50701-000Interchangeable
interchangeable cross-reference
interchangeable
40701-000Interchangeable
interchangeable cross-reference
interchangeable
1005202-3Interchangeable
interchangeable cross-reference
interchangeable
579R185H02Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 110S20?
110S20 is a WASHER,KEY.
What parts can replace 110S20?
There are 17 known substitutes for 110S20: C6908, 51021, 50701-000 and 14 more. Substitute compatibility should be verified for your specific system.
Is 110S20 still available?
110S20 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026