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ST3M445A4M2 — NUT,SELF-LOCKING,GANG CHANNEL

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

ST3M445A4M2: NUT,SELF-LOCKING,GANG CHANNEL.

The NUT,SELF-LOCKING,GANG CHANNEL is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: GANG CHANNEL, SELF LOCKING, base_width: 0.395 INCHES MINIMUM AND 0.405 INCHES MAXIMUM IN, nut_height: 0.305 INCHES MAXIMUM IN, nut_length: 0.557 INCHES MINIMUM AND 0.567 INCHES MAXIMUM IN, lubrication: DRY FILM LUBRICANT. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-129-2209, 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
ST3M445A4M2
NSN: 5310-01-129-2209
FSC: 5310 — Nuts and Washers
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleGANG CHANNEL, SELF LOCKING
base_width0.395 INCHES MINIMUM AND 0.405 INCHES MAXIMUM IN
nut_height0.305 INCHES MAXIMUM IN
nut_length0.557 INCHES MINIMUM AND 0.567 INCHES MAXIMUM IN
lubricationDRY FILM LUBRICANT
thread_class3B
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
base_thickness0.040 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN
locking_featurePREVAILING TORQUE ALL METAL DESIGN
thread_directionRIGHT-HAND
surface_treatmentCADMIUM AND CHROMATE OVERALL
NSN5310-01-129-2209
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: ST3M445A4M2 · 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
•
LUBRICATION: DRY FILM LUBRICANT
•
NUT LENGTH: 0.557 INCHES MINIMUM AND 0.567 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
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THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)
•
NUT COUNTERBORE DEPTH: 0.100 INCHES MINIMUM NUT IN
•
BASE WIDTH: 0.395 INCHES MINIMUM AND 0.405 INCHES MAXIMUM IN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
TECHNICAL CHARACTERISTICS
LUBRICATIONDRY FILM LUBRICANT
NUT LENGTH0.557 INCHES MINIMUM AND 0.567 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF)
NUT COUNTERBORE DEPTH0.100 INCHES MINIMUM NUT IN
BASE WIDTH0.395 INCHES MINIMUM AND 0.405 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.250 INCHES IN
COUNTERBORE DIAMETER0.254 INCHES MINIMUM NUT IN
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
SUBSTITUTES & CROSS-REFERENCES 2
10109522Reference document
Same NSN cross-reference
Reference document — Informative reference only
G14421-2-4Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 ST3M445A4M2?
ST3M445A4M2 is a NUT,SELF-LOCKING,GANG CHANNEL.
What parts can replace ST3M445A4M2?
There are 2 known substitutes for ST3M445A4M2: 10109522, G14421-2-4. Substitute compatibility should be verified for your specific system.
What is the NSN for ST3M445A4M2?
ST3M445A4M2 is cataloged in the U.S. Government catalog under NSN 5310-01-129-2209. 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.