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197125 — NUT,SELF-LOCKING,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

197125: NUT,SELF-LOCKING,HEXAGON.

The NUT,SELF-LOCKING,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4037 OVERALL, head_style: HEXAGON, head_height: 0.203 INCHES NOMINAL IN, thread_class: 2A A, thread_length: 2.389 INCHES MINIMUM AND 2.500 INCHES MAXIMUM IN, fastener_length: 2.500 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-582-8201, 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
197125
NSN: 5310-00-582-8201
NIINs: 005828201, 012383135
FSC: 5310 — Nuts and Washers
CAGE: 2A659 — AIRMOTIVE CARBURETOR (USA)
SPECIFICATIONS
materialSTEEL COMP 4037 OVERALL
head_styleHEXAGON
head_height0.203 INCHES NOMINAL IN
thread_class2A A
thread_length2.389 INCHES MINIMUM AND 2.500 INCHES MAXIMUM IN
fastener_length2.500 INCHES NOMINAL IN
hardness_rating32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL
special_featuresCOLOR BLUE
thread_directionRIGHT-HAND
features_providedFINISHED HEAD
surface_treatmentCHROMATE ZINC OVERALL
width_between_flats0.500 INCHES NOMINAL IN
NSN5310-00-582-8201
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 197125 · 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: 0.438 INCHES NOMINAL IN
•
THREAD SERIES: UNF
•
TEMP RATING: 250.0 FAHRENHEIT NOMINAL DEGF
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MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5024 ASSN STD SINGLE MATERIAL RESPONSE NUT
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THREAD DIRECTION: RIGHT-HAND
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NOMINAL THREAD SIZE: 0.250 INCHES IN
•
LOCKING FEATURE: PREVAILING TORQUE WITH NONMETALLIC INSERT
•
NUT HEIGHT: 0.203 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.438 INCHES NOMINAL IN
THREAD SERIESUNF
TEMP RATING250.0 FAHRENHEIT NOMINAL DEGF
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5024 ASSN STD SINGLE MATERIAL RESPONSE NUT
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.250 INCHES IN
LOCKING FEATUREPREVAILING TORQUE WITH NONMETALLIC INSERT
NUT HEIGHT0.203 INCHES NOMINAL IN
SURFACE TREATMENTCADMIUM OVERALL EXCEPT INSERT
NUT STYLEHEXAGON
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 197125?
197125 is a NUT,SELF-LOCKING,HEXAGON.
What is the NSN for 197125?
197125 is cataloged in the U.S. Government catalog under NSN 5310-00-582-8201. 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.