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21049 ✓ Verified by PartsTable
Bestway · 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

CRYSTAL CLEAR GOGGLES<br>- Soft comfort-fit eyecups<br>- Color-tint lenses, polycarbonate lenses with 100% UV protective coating<br>- Fully adjustable nose bridge and silicone head strap<br>Content: One pair of goggles<br>Made in China This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-431-7349, 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
21049
NSN: 5310-00-431-7349
FSC: 5310
CAGE: 64104 — DRESSER, LLC (USA)
SPECIFICATIONS
diameter0.3750 INCHES NOMINAL IN
materialPLASTIC POLYHEXAMETHYLENE ADIPAMIDE OVERALL
body_width0.610 INCHES MAXIMUM IN
body_height0.300 INCHES MAXIMUM IN
body_length0.810 INCHES MAXIMUM IN
overall_width0.3590 INCHES MINIMUM AND 0.3910 INCHES MAXIMUM IN
inclosure_typeFULLY INCLOSED
overall_height0.420 INCHES NOMINAL IN
overall_length0.820 INCHES MAXIMUM IN
mounting_methodTERMINAL SINGLE GROUP
frequency_rating400.0 HERTZ NOMINAL SINGLE COMPONENT
special_featuresTAKEDOWN 5.56
NSN5310-00-431-7349
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 21049 · Bestway ⚠ 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 9
21049Interchangeable
interchangeable cross-reference
interchangeable
50573Interchangeable
interchangeable cross-reference
interchangeable
21049EInterchangeable
interchangeable cross-reference
interchangeable
5L.5021.003.11Interchangeable
interchangeable cross-reference
interchangeable
1810545Interchangeable
interchangeable cross-reference
interchangeable
425163-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21049?
21049 is a TRANSFORMER,POWER manufactured by Bestway.
What parts can replace 21049?
There are 9 known substitutes for 21049: 21049, 50573, 21049E and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21049?
21049 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-431-7349. 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