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Technical Data Sheet
PartsTable / COMPONENT / 44J108PC51
44J108PC51 ✓ 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 hole_diameter: 4.801 INCHES MINIMUM AND 4.831 INCHES MAXIMUM IN, hardness_rating: 50.0 ROCKWELL B MINIMUM AND 81.0 ROCKWELL B MAXIMUM, outside_diameter: 5.688 INCHES MINIMUM AND 5.733 INCHES MAXIMUM IN, style_designator: KEY, material_thickness: 0.118 INCHES MINIMUM AND 0.132 INCHES MAXIMUM IN, external_key_quantity: 19. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-186-0982, 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
44J108PC51
NSN: 5310-00-186-0982
FSC: 5310
CAGE: 79500 — WESTINGHOUSE ELECTRIC CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 1010 OR STEEL COMP 1012 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OVERALL
hole_diameter4.801 INCHES MINIMUM AND 4.831 INCHES MAXIMUM IN
hardness_rating50.0 ROCKWELL B MINIMUM AND 81.0 ROCKWELL B MAXIMUM
outside_diameter5.688 INCHES MINIMUM AND 5.733 INCHES MAXIMUM IN
style_designatorKEY
material_thickness0.118 INCHES MINIMUM AND 0.132 INCHES MAXIMUM IN
external_key_quantity19
end_item_identificationMULTIPLE LAUNCH ROCKET SYSTEM (MLRS)
external_prebent_key_width0.360 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN
internal_prebent_key_width0.313 INCHES MINIMUM AND 0.353 INCHES MAXIMUM IN
internal_prebent_key_length0.250 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
overall_distance_including_keys6.469 INCHES MAXIMUM IN
NSN5310-00-186-0982
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 44J108PC51 · 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 1010 OR STEEL COMP 1012 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OVERALL
•
EXTERNAL KEY QUANTITY: 19
•
STYLE DESIGNATOR: KEY
•
HARDNESS RATING: 50.0 ROCKWELL B MINIMUM AND 81.0 ROCKWELL B MAXIMUM
•
MATERIAL THICKNESS: 0.118 INCHES MINIMUM AND 0.132 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD ALL MATERIAL RESPONSES OVERALL
•
OVERALL DISTANCE INCLUDING KEYS: 6.469 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL COMP 1010 OR STEEL COMP 1012 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OVERALL
EXTERNAL KEY QUANTITY19
STYLE DESIGNATORKEY
END ITEM IDENTIFICATIONMULTIPLE LAUNCH ROCKET SYSTEM (MLRS)
HARDNESS RATING50.0 ROCKWELL B MINIMUM AND 81.0 ROCKWELL B MAXIMUM
MATERIAL THICKNESS0.118 INCHES MINIMUM AND 0.132 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD ALL MATERIAL RESPONSES OVERALL
OVERALL DISTANCE INCLUDING KEYS6.469 INCHES MAXIMUM IN
INTERNAL PREBENT KEY WIDTH0.313 INCHES MINIMUM AND 0.353 INCHES MAXIMUM IN
EXTERNAL PREBENT KEY WIDTH0.360 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
40466Interchangeable
interchangeable cross-reference
interchangeable
1583908-2Interchangeable
interchangeable cross-reference
interchangeable
550-BInterchangeable
interchangeable cross-reference
interchangeable
24676Interchangeable
interchangeable cross-reference
interchangeable
45627Interchangeable
interchangeable cross-reference
interchangeable
150ASP 23/64Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 44J108PC51?
44J108PC51 is a WASHER,KEY.
What parts can replace 44J108PC51?
There are 24 known substitutes for 44J108PC51: 40466, 1583908-2, 550-B and 21 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 44J108PC51?
44J108PC51 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-186-0982. 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