PartsTable
Technical Data Sheet
1230279 ✓ Verified by PartsTable
3M · MRO · MRO_GENERAL
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

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This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-021-8563, 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
MRO MRO_GENERAL 1230279
NSN: 5310-00-021-8563
FSC: 5310
CAGE: 79500 — WESTINGHOUSE ELECTRIC CORP (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.203 INCHES NOMINAL IN
thread_class2B
body_materialMETAL
thread_seriesUNF
inclosure_typeENCASED
thread_directionRIGHT-HAND
features_providedCABLE
maximum_temp_rise15.0 CELSIUS DEGC
width_across_flats0.438 INCHES NOMINAL IN
nominal_thread_size0.250 INCHES IN
NSN5310-00-021-8563
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1230279 · 3M ⚠ 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
NUT STYLE: HEXAGON
THREAD CLASS: 2B
THREAD DIRECTION: RIGHT-HAND
NOMINAL THREAD SIZE: 0.250 INCHES IN
THREAD QUANTITY PER INCH: 28
THREAD SERIES: UNF
BEARING SURFACE TYPE: WASHER FACED
TECHNICAL CHARACTERISTICS (FLIS)
WIDTH ACROSS FLATS0.438 INCHES NOMINAL IN
NUT STYLEHEXAGON
THREAD CLASS2B
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.250 INCHES IN
THREAD QUANTITY PER INCH28
THREAD SERIESUNF
BEARING SURFACE TYPEWASHER FACED
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-633-CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL
DEPARTURE FROM CITED DOCUMENTAS MODIFIED BY NUT HEIGHT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
G210722-4Interchangeable
interchangeable cross-reference
interchangeable
D9578-1-27Interchangeable
interchangeable cross-reference
interchangeable
121574Interchangeable
interchangeable cross-reference
interchangeable
35Y22 W/SCREW ASSYInterchangeable
interchangeable cross-reference
interchangeable
31Y13Interchangeable
interchangeable cross-reference
interchangeable
639125 W/REG CAP ASSYInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1230279?
1230279 is a FILTER,RADIO FREQUENCY INTERFERE manufactured by 3M. It is classified as a MRO (MRO_GENERAL).
What parts can replace 1230279?
There are 21 known substitutes for 1230279: G210722-4, D9578-1-27, 121574 and 18 more. Substitute compatibility should be verified for your specific system.
Is 1230279 still available?
1230279 is currently cancelled.
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