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Technical Data Sheet
PartsTable / COMPONENT / W17
W17 ✓ 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,FLAT is a the manufacturer industrial component. Key specifications include material: PLASTIC POLYAMIDE NYLON OVERALL, thickness: 0.031 INCHES NOMINAL IN, hole_diameter: 0.312 INCHES NOMINAL IN, hardness_rating: 50.0 ROCKWELL B MINIMUM AND 81.0 ROCKWELL B MAXIMUM, outside_diameter: 4.031 INCHES MINIMUM AND 4.061 INCHES MAXIMUM IN, overall_diameter: 0.812 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-186-0976, 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
W17
NSN: 5310-00-186-0976
FSC: 5310
CAGE: 65177 — PATTERSON PUMP CO DIV PATTERSON PUMP COMPANY (USA)
SPECIFICATIONS
materialPLASTIC POLYAMIDE NYLON OVERALL
thickness0.031 INCHES NOMINAL IN
hole_diameter0.312 INCHES NOMINAL IN
hardness_rating50.0 ROCKWELL B MINIMUM AND 81.0 ROCKWELL B MAXIMUM
outside_diameter4.031 INCHES MINIMUM AND 4.061 INCHES MAXIMUM IN
overall_diameter0.812 INCHES NOMINAL IN
style_designatorKEY
material_thickness0.067 INCHES MINIMUM AND 0.077 INCHES MAXIMUM IN
external_key_quantity19
peripheral_shape_styleROUND
center_hole_shape_styleROUND
external_prebent_key_width0.313 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
NSN5310-00-186-0976
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: W17 · 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: STEEL COMP 1005 OR STEEL COMP 1006 OR STEEL COMP 1008 OR STEEL COMP 1010 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1018 OR STEEL COMP 1025 OR STEEL COMP 1030 OR STEEL COMP 1035 OVERALL
•
EXTERNAL PREBENT KEY WIDTH: 0.313 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: KEY
•
HOLE DIAMETER: 3.395 INCHES MINIMUM AND 3.425 INCHES MAXIMUM IN
•
HARDNESS RATING: 50.0 ROCKWELL B MINIMUM AND 81.0 ROCKWELL B MAXIMUM
•
EXTERNAL KEY QUANTITY: 19
•
MATERIAL THICKNESS: 0.067 INCHES MINIMUM AND 0.077 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 4.031 INCHES MINIMUM AND 4.061 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL COMP 1005 OR STEEL COMP 1006 OR STEEL COMP 1008 OR STEEL COMP 1010 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1018 OR STEEL COMP 1025 OR STEEL COMP 1030 OR STEEL COMP 1035 OVERALL
EXTERNAL PREBENT KEY WIDTH0.313 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
STYLE DESIGNATORKEY
HOLE DIAMETER3.395 INCHES MINIMUM AND 3.425 INCHES MAXIMUM IN
HARDNESS RATING50.0 ROCKWELL B MINIMUM AND 81.0 ROCKWELL B MAXIMUM
EXTERNAL KEY QUANTITY19
MATERIAL THICKNESS0.067 INCHES MINIMUM AND 0.077 INCHES MAXIMUM IN
OUTSIDE DIAMETER4.031 INCHES MINIMUM AND 4.061 INCHES MAXIMUM IN
INTERNAL PREBENT KEY LENGTH0.188 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
OVERALL DISTANCE INCLUDING KEYS4.625 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 31
80830Interchangeable
interchangeable cross-reference
interchangeable
G538656Interchangeable
interchangeable cross-reference
interchangeable
38240Interchangeable
interchangeable cross-reference
interchangeable
T61138Interchangeable
interchangeable cross-reference
interchangeable
71-1231Interchangeable
interchangeable cross-reference
interchangeable
71-1230Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is W17?
W17 is a WASHER,FLAT.
What parts can replace W17?
There are 31 known substitutes for W17: 80830, G538656, 38240 and 28 more. Substitute compatibility should be verified for your specific system.
Is W17 still available?
W17 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