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Technical Data Sheet
PartsTable / COMPONENT / 188091
188091 ✓ 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 NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include color: WHITE, width: 8.500 INCHES NOMINAL IN, length: 11.000 INCHES NOMINAL IN, usage_form: SHEET. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-275-5609, 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
188091
NSN: 5310-00-275-5609
FSC: 5310
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
colorWHITE
width8.500 INCHES NOMINAL IN
length11.000 INCHES NOMINAL IN
usage_formSHEET
specific_useDEXTEROUS PAPER DESIGNED TO RUN ON DIGITAL AND OFFSET EQUIPMENT INCLUDING HIGH SPEED PRINTERS, COPIERS AND DIGITAL PRESSES
NSN5310-00-275-5609
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 188091 · 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 303 OR STEEL COMP 303SE OR STEEL COMP 303 PLUS X OVERALL
•
NOMINAL THREAD SIZE: 0.190 INCHES IN
•
THREAD QUANTITY PER INCH: 32
•
THREAD SERIES: UNF
•
NUT HEIGHT: 0.155 INCHES MINIMUM AND 0.165 INCHES MAXIMUM IN
•
THREAD CLASS: 3B
•
WIDTH ACROSS FLATS: 0.304 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN
•
NUT STYLE: HEXAGON
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL COMP 303 OR STEEL COMP 303SE OR STEEL COMP 303 PLUS X OVERALL
NOMINAL THREAD SIZE0.190 INCHES IN
THREAD QUANTITY PER INCH32
THREAD SERIESUNF
NUT HEIGHT0.155 INCHES MINIMUM AND 0.165 INCHES MAXIMUM IN
THREAD CLASS3B
WIDTH ACROSS FLATS0.304 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN
NUT STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5640 ASSN STD ALL MATERIAL RESPONSES OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
00444Interchangeable
interchangeable cross-reference
interchangeable
17-2880Interchangeable
interchangeable cross-reference
interchangeable
123-4695Interchangeable
interchangeable cross-reference
interchangeable
420-24-50Interchangeable
interchangeable cross-reference
interchangeable
188091Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 188091?
188091 is a NUT,PLAIN,HEXAGON.
What parts can replace 188091?
There are 5 known substitutes for 188091: 00444, 17-2880, 123-4695 and 2 more. Substitute compatibility should be verified for your specific system.
Is 188091 still available?
188091 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