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8TW2117 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

8TW2117: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include outside_diameter: 4.031 INCHES NOMINAL IN, style_designator: KEY, material_thickness: 0.095 INCHES NOMINAL IN, external_key_quantity: 19, overall_distance_including_keys: 4.625 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-172-1990, 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
8TW2117
NSN: 5310-01-172-1990
FSC: 5310 — Nuts and Washers
CAGE: 13841 — TIFFIN PARTS, L.L.C. DIV SUBSIDIARY OF PETTIBONE CORP. (USA)
SPECIFICATIONS
outside_diameter4.031 INCHES NOMINAL IN
style_designatorKEY
material_thickness0.095 INCHES NOMINAL IN
external_key_quantity19
overall_distance_including_keys4.625 INCHES NOMINAL IN
NSN5310-01-172-1990
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 8TW2117 · 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
•
OVERALL DISTANCE INCLUDING KEYS: 4.625 INCHES NOMINAL IN
•
STYLE DESIGNATOR: KEY
•
OUTSIDE DIAMETER: 4.031 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.095 INCHES NOMINAL IN
•
EXTERNAL KEY QUANTITY: 19
TECHNICAL CHARACTERISTICS
OVERALL DISTANCE INCLUDING KEYS4.625 INCHES NOMINAL IN
STYLE DESIGNATORKEY
OUTSIDE DIAMETER4.031 INCHES NOMINAL IN
MATERIAL THICKNESS0.095 INCHES NOMINAL IN
EXTERNAL KEY QUANTITY19
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES 2
5310PL0721985Reference document
Same NSN cross-reference
Reference document — Informative reference only
TW117Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 8TW2117?
8TW2117 is a WASHER,KEY.
What parts can replace 8TW2117?
There are 2 known substitutes for 8TW2117: 5310PL0721985, TW117. Substitute compatibility should be verified for your specific system.
What is the NSN for 8TW2117?
8TW2117 is cataloged in the U.S. Government catalog under NSN 5310-01-172-1990. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.