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Technical Data Sheet
PartsTable / COMPONENT / EM21
EM21 ✓ Verified by PartsTable
— · NUT WASHER
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

The NUT,SELF-LOCKING,HEXAGON is a the manufacturer industrial component. Key specifications include special_features: 1.5 INCHES WIDE IN, end_item_identification: 6530-01-472-6786; CONTROL NUMBER 00-0063, general_characteristics_item_description: FOR USE AS CARRYING BAG FOR THE VACUUM SUPER SPLINT IN INJURY IMMOBILIZATION, part_name_assigned_by_controlling_agency: TAPE FLAGGING RED 1.5 IN WIDE E.I. 6530-01-472-6786 IN.

This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-280-7666, 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
EM21
NSN: 5310-01-280-7666
FSC: 5310
CAGE: 35683 — INTEGRATED DISTRIBUTION SYSTEMSLIMITED PARTNERSHIPDBA WATEROUS POWER SYSTEMS (CAN)
SPECIFICATIONS
special_features1.5 INCHES WIDE IN
end_item_identification6530-01-472-6786; CONTROL NUMBER 00-0063
general_characteristics_item_descriptionFOR USE AS CARRYING BAG FOR THE VACUUM SUPER SPLINT IN INJURY IMMOBILIZATION
part_name_assigned_by_controlling_agencyTAPE FLAGGING RED 1.5 IN WIDE E.I. 6530-01-472-6786 IN
NSN5310-01-280-7666
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: EM21 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
94-5251Interchangeable
interchangeable cross-reference
interchangeable
EM-21Interchangeable
interchangeable cross-reference
interchangeable
00-0064Interchangeable
interchangeable cross-reference
interchangeable
EM101Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is EM21?
EM21 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace EM21?
There are 4 known substitutes for EM21: 94-5251, EM-21, 00-0064 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for EM21?
EM21 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-280-7666. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026