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91833A125 — NUT,PLAIN,KNURLED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

91833A125: NUT,PLAIN,KNURLED.

The NUT,PLAIN,KNURLED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303SE OVERALL, nut_style: KNURLED, knurl_width: 0.188 INCHES NOMINAL IN, nut_diameter: 0.500 INCHES NOMINAL IN, thread_class: 2B, nut_thickness: 0.438 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-581-4126, 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
91833A125
NSN: 5310-01-581-4126
FSC: 5310 — Nuts and Washers
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialSTEEL COMP 303SE OVERALL
nut_styleKNURLED
knurl_width0.188 INCHES NOMINAL IN
nut_diameter0.500 INCHES NOMINAL IN
thread_class2B
nut_thickness0.438 INCHES NOMINAL IN
thread_seriesUNIFIED NATIONAL COARSE (UNC)
hardness_rating60.0 ROCKWELL B NOMINAL
thread_directionRIGHT-HAND
small_end_diameter0.375 INCHES NOMINAL IN
width_across_flats0.375 INCHES NOMINAL IN
nominal_thread_size0.190 INCHES IN
NSN5310-01-581-4126
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 91833A125 · 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
•
WIDTH ACROSS FLATS: 0.375 INCHES NOMINAL IN
•
THREAD TOLERANCE CLASS: H2 INTERNAL
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
HARDNESS RATING: 60.0 ROCKWELL B NOMINAL
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A581,ASTM A582 NATIONAL SPEC ALL MATERIAL RESPONSES OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.190 INCHES IN
•
NUT DIAMETER: 0.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.375 INCHES NOMINAL IN
THREAD TOLERANCE CLASSH2 INTERNAL
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
HARDNESS RATING60.0 ROCKWELL B NOMINAL
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A581,ASTM A582 NATIONAL SPEC ALL MATERIAL RESPONSES OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.190 INCHES IN
NUT DIAMETER0.500 INCHES NOMINAL IN
NUT THICKNESS0.438 INCHES NOMINAL IN
SMALL END DIAMETER0.375 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 91833A125?
91833A125 is a NUT,PLAIN,KNURLED.
What is the NSN for 91833A125?
91833A125 is cataloged in the U.S. Government catalog under NSN 5310-01-581-4126. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.