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WM21-143 — NUT,SLEEVE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

WM21-143: NUT,SLEEVE.

The NUT,SLEEVE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, nut_style: SLEEVE, nut_length: 0.060 INCHES NOMINAL IN, nut_diameter: 0.123 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 0.100 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-033-3055, 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
WM21-143
NSN: 5310-00-033-3055
FSC: 5310 — Nuts and Washers
CAGE: 35918 — HORIZON AEROSPACE LLC DBA MAGNETICS DIVISION (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
nut_styleSLEEVE
nut_length0.060 INCHES NOMINAL IN
nut_diameter0.123 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN
thread_class2A A
thread_length0.100 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
thread_seriesUNS
flange_thickness0.050 INCHES NOMINAL IN
thread_directionRIGHT-HAND
surface_treatmentNICKEL OVERALL
nominal_thread_size0.100 INCHES IN
cross-sectional_shapeHEXAGONAL FLANGE
NSN5310-00-033-3055
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: WM21-143 · 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
•
FLANGE WIDTH ACROSS FLATS: 0.188 INCHES NOMINAL IN
•
NUT LENGTH: 0.060 INCHES NOMINAL IN
•
FLANGE THICKNESS: 0.050 INCHES NOMINAL IN
•
THREAD SERIES: UNS
•
THREAD LENGTH: 0.100 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-B-611A FED SPEC SINGLE MATERIAL RESPONSE OVERALL A
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.100 INCHES IN
TECHNICAL CHARACTERISTICS
FLANGE WIDTH ACROSS FLATS0.188 INCHES NOMINAL IN
NUT LENGTH0.060 INCHES NOMINAL IN
FLANGE THICKNESS0.050 INCHES NOMINAL IN
THREAD SERIESUNS
THREAD LENGTH0.100 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-B-611A FED SPEC SINGLE MATERIAL RESPONSE OVERALL A
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.100 INCHES IN
NUT DIAMETER0.123 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPEHEXAGONAL FLANGE
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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is WM21-143?
WM21-143 is a NUT,SLEEVE.
What is the NSN for WM21-143?
WM21-143 is cataloged in the U.S. Government catalog under NSN 5310-00-033-3055. 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.