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213549 — METER,SPECIAL SCALE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

213549: METER,SPECIAL SCALE.

The METER,SPECIAL SCALE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: HEXAGON, nut_height: 0.398 INCHES MINIMUM AND 0.415 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UNIFIED NATIONAL COARSE (UNC), indicator_type: DIGITAL DISPLAY. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-021-3549, 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
213549
NSN: 5310-00-021-3549
NIINs: 000213549, 017159393
FSC: 5310 — Nuts and Washers
CAGE: 56442 — DIAMOND REO TRUCK CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.398 INCHES MINIMUM AND 0.415 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
indicator_typeDIGITAL DISPLAY
thread_directionRIGHT-HAND
surface_treatmentLEAD OVERALL
width_across_flats0.5510 INCHES MINIMUM AND 0.5625 INCHES MAXIMUM IN
installation_designHANDHELD
nominal_thread_size0.375 INCHES IN
bearing_surface_typeCHAMFERED OR WASHER FACED
NSN5310-00-021-3549
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 213549 · 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: 0.5510 INCHES MINIMUM AND 0.5625 INCHES MAXIMUM IN
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.375 INCHES IN
•
DEPARTURE FROM CITED DOCUMENT: AS MODIFIED BY HEIGHT RQMT
•
NONDEFINITIVE SPEC/STD DATA: A TYPE
•
NUT HEIGHT: 0.398 INCHES MINIMUM AND 0.415 INCHES MAXIMUM IN
•
SURFACE TREATMENT: LEAD OVERALL
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.5510 INCHES MINIMUM AND 0.5625 INCHES MAXIMUM IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.375 INCHES IN
DEPARTURE FROM CITED DOCUMENTAS MODIFIED BY HEIGHT RQMT
NONDEFINITIVE SPEC/STD DATAA TYPE
NUT HEIGHT0.398 INCHES MINIMUM AND 0.415 INCHES MAXIMUM IN
SURFACE TREATMENTLEAD OVERALL
NUT STYLEHEXAGON
THREAD CLASS2B
SUBSTITUTES & CROSS-REFERENCES 1
FFB571TYPEAReference document
Same NSN cross-reference
Reference document — Identification reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 213549?
213549 is a METER,SPECIAL SCALE.
What parts can replace 213549?
There is 1 known substitute for 213549: FFB571TYPEA. Substitute compatibility should be verified for your specific system.
What is the NSN for 213549?
213549 is cataloged in the U.S. Government catalog under NSN 5310-00-021-3549. 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.