PartsTable
Technical Data Sheet
A10191 ✓ 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

INSULATION SLEEVING,ELECTRICAL,S. Key specifications include color: BLACK, material: COPPER ALLOY, nut_style: SLOTTED, HEXAGON, nut_height: 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN, flexibility: SEMIRIGID, temp_rating: -55.0 CELSIUS AND 135.0 CELSIUS DEGC. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-515-2939, 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
A10191
NSN: 5310-00-515-2939
FSC: 5310
CAGE: U4574 — FNH UK LTD (GBR)
SPECIFICATIONS
colorBLACK
materialCOPPER ALLOY
nut_styleSLOTTED, HEXAGON
nut_height0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
flexibilitySEMIRIGID
temp_rating-55.0 CELSIUS AND 135.0 CELSIUS DEGC
thread_class2B
thread_seriesUNF
hardness_rating30.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM
overall_diameter12.125 INCHES NOMINAL IN
thread_directionRIGHT-HAND
surface_treatmentPHOSPHATE OVERALL
NSN5310-00-515-2939
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: A10191 · 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
NUT HEIGHT: 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
HARDNESS RATING: 30.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM
BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
THREAD SERIES: UNF
NOMINAL THREAD SIZE: 0.500 INCHES IN
BEARING SURFACE FINISH: 125.0 MICROINCHES
THREAD QUANTITY PER INCH: 20
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
NUT HEIGHT0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
HARDNESS RATING30.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
THREAD SERIESUNF
NOMINAL THREAD SIZE0.500 INCHES IN
BEARING SURFACE FINISH125.0 MICROINCHES
THREAD QUANTITY PER INCH20
THREAD DIRECTIONRIGHT-HAND
SURFACE TREATMENTPHOSPHATE OVERALL
MATERIALSTEEL COMP 1050 OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
A10198Interchangeable
interchangeable cross-reference
interchangeable
128C157H04Interchangeable
interchangeable cross-reference
interchangeable
562-105Interchangeable
interchangeable cross-reference
interchangeable
5152939Interchangeable
interchangeable cross-reference
interchangeable
33489Interchangeable
interchangeable cross-reference
interchangeable
A10199Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A10191?
A10191 is a INSULATION SLEEVING,ELECTRICAL,S.
What parts can replace A10191?
There are 18 known substitutes for A10191: A10198, 128C157H04, 562-105 and 15 more. Substitute compatibility should be verified for your specific system.
Is A10191 still available?
A10191 is currently cancelled.
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