PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 999-51108-0000
999-51108-0000 ✓ 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 OVERALL, hole_diameter: 1.603 INCHES NOMINAL1.603 INCHES NOMINAL IN, outside_diameter: 2.000 INCHES NOMINAL2.000 INCHES NOMINAL IN, style_designator: KEYKEY, material_thickness: 0.072 INCHES NOMINAL0.072 INCHES NOMINAL IN, external_key_quantity: 1515. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-271-0369, 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
999-51108-0000
NSN: 5310-00-271-0369
FSC: 5310
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter1.603 INCHES NOMINAL1.603 INCHES NOMINAL IN
outside_diameter2.000 INCHES NOMINAL2.000 INCHES NOMINAL IN
style_designatorKEYKEY
material_thickness0.072 INCHES NOMINAL0.072 INCHES NOMINAL IN
external_key_quantity1515
external_prebent_key_width0.219 INCHES NOMINAL0.219 INCHES NOMINAL IN
internal_prebent_key_width0.219 INCHES NOMINAL0.219 INCHES NOMINAL IN
internal_prebent_key_length0.094 INCHES NOMINAL0.094 INCHES NOMINAL IN
overall_distance_including_keys2.469 INCHES NOMINAL2.469 INCHES NOMINAL IN
NSN5310-00-271-0369
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 999-51108-0000 · 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
•
HOLE DIAMETER: 1.603 INCHES NOMINAL1.603 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 2.000 INCHES NOMINAL2.000 INCHES NOMINAL IN
•
EXTERNAL KEY QUANTITY: 1515
•
MATERIAL THICKNESS: 0.072 INCHES NOMINAL0.072 INCHES NOMINAL IN
•
INTERNAL PREBENT KEY WIDTH: 0.219 INCHES NOMINAL0.219 INCHES NOMINAL IN
•
INTERNAL PREBENT KEY LENGTH: 0.094 INCHES NOMINAL0.094 INCHES NOMINAL IN
•
OVERALL DISTANCE INCLUDING KEYS: 2.469 INCHES NOMINAL2.469 INCHES NOMINAL IN
•
EXTERNAL PREBENT KEY WIDTH: 0.219 INCHES NOMINAL0.219 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
HOLE DIAMETER1.603 INCHES NOMINAL1.603 INCHES NOMINAL IN
OUTSIDE DIAMETER2.000 INCHES NOMINAL2.000 INCHES NOMINAL IN
EXTERNAL KEY QUANTITY1515
MATERIAL THICKNESS0.072 INCHES NOMINAL0.072 INCHES NOMINAL IN
INTERNAL PREBENT KEY WIDTH0.219 INCHES NOMINAL0.219 INCHES NOMINAL IN
INTERNAL PREBENT KEY LENGTH0.094 INCHES NOMINAL0.094 INCHES NOMINAL IN
OVERALL DISTANCE INCLUDING KEYS2.469 INCHES NOMINAL2.469 INCHES NOMINAL IN
EXTERNAL PREBENT KEY WIDTH0.219 INCHES NOMINAL0.219 INCHES NOMINAL IN
STYLE DESIGNATORKEYKEY
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
22HS682Interchangeable
interchangeable cross-reference
interchangeable
99506Interchangeable
interchangeable cross-reference
interchangeable
6206DDUCE1SA2Interchangeable
interchangeable cross-reference
interchangeable
W108Interchangeable
interchangeable cross-reference
interchangeable
18235Interchangeable
interchangeable cross-reference
interchangeable
E-4027 ITEM 170AInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 999-51108-0000?
999-51108-0000 is a WASHER,KEY.
What parts can replace 999-51108-0000?
There are 12 known substitutes for 999-51108-0000: 22HS682, 99506, 6206DDUCE1SA2 and 9 more. Substitute compatibility should be verified for your specific system.
Is 999-51108-0000 still available?
999-51108-0000 is currently cancelled.
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Last verified: July 2026