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Technical Data Sheet
PartsTable / COMPONENT / 0551-45
0551-45 ✓ 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

DECK AND FLOOR COVERING UNDERLAY. Key specifications include special_features: TERRAZZO M UNDERLAY; COLORED POWDER, content_within_each_unit_package: 45 POUNDS LBS, color_designation_per_fed_spec/std_595: COLOR NOT MATCHING IN FED SPEC TT-C-595 OR FED STD 595. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-189-4425, 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
0551-45
NSN: 5310-00-189-4425
FSC: 5310
CAGE: 63734 — KAITLIN CORP (USA)
SPECIFICATIONS
special_featuresTERRAZZO M UNDERLAY; COLORED POWDER
content_within_each_unit_package45 POUNDS LBS
color_designation_per_fed_spec/std_595COLOR NOT MATCHING IN FED SPEC TT-C-595 OR FED STD 595
NSN5310-00-189-4425
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 0551-45 · 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
•
THREAD SERIES: UNF
•
NOMINAL THREAD SIZE: 0.625 INCHES IN
•
THREAD QUANTITY PER INCH: 18
•
BEARING SURFACE TYPE: WASHER FACED
•
NUT STYLE: HEXAGON
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
WIDTH ACROSS FLATS: 0.938 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 1020 OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIESUNF
NOMINAL THREAD SIZE0.625 INCHES IN
THREAD QUANTITY PER INCH18
BEARING SURFACE TYPEWASHER FACED
NUT STYLEHEXAGON
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
WIDTH ACROSS FLATS0.938 INCHES NOMINAL IN
MATERIALSTEEL COMP 1020 OVERALL
THREAD DIRECTIONRIGHT-HAND
NUT HEIGHT0.812 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
B844Interchangeable
interchangeable cross-reference
interchangeable
53018Interchangeable
interchangeable cross-reference
interchangeable
05-5145Interchangeable
interchangeable cross-reference
interchangeable
8-2959-01Interchangeable
interchangeable cross-reference
interchangeable
8-1506-01Interchangeable
interchangeable cross-reference
interchangeable
TERRAZZO M UNDERLAYInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 0551-45?
0551-45 is a DECK AND FLOOR COVERING UNDERLAY.
What parts can replace 0551-45?
There are 8 known substitutes for 0551-45: B844, 53018, 05-5145 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 0551-45?
0551-45 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-189-4425. 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