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MS21070-3K — NUT,SELF-LOCKING,PLATE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

MS21070-3K: NUT,SELF-LOCKING,PLATE.

The NUT,SELF-LOCKING,PLATE is a the manufacturer industrial component. Key specifications include material: IRON ALLOY 660 OVERALL, nut_style: PLATE (FLOATING), nut_height: 0.202 INCHES MAXIMUM IN, nut_length: 0.712 INCHES MAXIMUM IN, lubrication: DRY FILM LUBRICANT, plate_width: 0.308 INCHES MINIMUM AND 0.321 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-945-0517, 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
MS21070-3K
NSN: 5310-00-945-0517
NIINs: 009450517, 010091288
FSC: 5310 — Nuts and Washers
CAGE: A0126 — LEONARDO SPA HELICOPTERS DIVISION - PRODUCTION SITE (ITA)
SPECIFICATIONS
materialIRON ALLOY 660 OVERALL
nut_stylePLATE (FLOATING)
nut_height0.202 INCHES MAXIMUM IN
nut_length0.712 INCHES MAXIMUM IN
lubricationDRY FILM LUBRICANT
plate_width0.308 INCHES MINIMUM AND 0.321 INCHES MAXIMUM IN
thread_class3B
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
hardness_rating30.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM
locking_featurePREVAILING TORQUE ALL METAL DESIGN
plate_thickness0.047 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
NSN5310-00-945-0517
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MS21070-3K · 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
SUBSTITUTES & CROSS-REFERENCES 5
MT2C1032BCReference document
Same NSN cross-reference
Reference document — Secondary reference
RM200C3KReference document
Same NSN cross-reference
Reference document — Secondary reference
M 12700-02BCReference document
Same NSN cross-reference
Reference document — Secondary reference
LHTA51M2860-02BCReference document
Same NSN cross-reference
Reference document — Secondary reference
LS12906-152Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
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 MS21070-3K?
MS21070-3K is a NUT,SELF-LOCKING,PLATE.
What parts can replace MS21070-3K?
There are 5 known substitutes for MS21070-3K: MT2C1032BC, RM200C3K, M 12700-02BC and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS21070-3K?
MS21070-3K is cataloged in the U.S. Government catalog under NSN 5310-00-945-0517. 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.