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PartsTable / COMPONENT / SW33556-7
SW33556-7 ✓ 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 WASHER,LOCK is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 0.295 INCHES MINIMUM AND 0.305 INCHES MAXIMUM IN, outside_diameter: 0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN, style_designator: FLAT INTERNAL TEETH, surface_treatment: ZINC OVERALL, material_thickness: 0.012 INCHES NOMINAL 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 5310-01-371-7180, 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
SW33556-7
NSN: 5310-01-371-7180
FSC: 5310
CAGE: 98255 — DRS SUSTAINMENT SYSTEMS INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter0.295 INCHES MINIMUM AND 0.305 INCHES MAXIMUM IN
outside_diameter0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN
style_designatorFLAT INTERNAL TEETH
surface_treatmentZINC OVERALL
material_thickness0.012 INCHES NOMINAL IN
NSN5310-01-371-7180
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: SW33556-7 · 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
•
SURFACE TREATMENT: ZINC OVERALL
•
OUTSIDE DIAMETER: 0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: FLAT INTERNAL TEETH
•
HOLE DIAMETER: 0.295 INCHES MINIMUM AND 0.305 INCHES MAXIMUM IN
•
MATERIAL: STEEL OVERALL
•
MATERIAL THICKNESS: 0.012 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENTZINC OVERALL
OUTSIDE DIAMETER0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN
STYLE DESIGNATORFLAT INTERNAL TEETH
HOLE DIAMETER0.295 INCHES MINIMUM AND 0.305 INCHES MAXIMUM IN
MATERIALSTEEL OVERALL
MATERIAL THICKNESS0.012 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
X5008/12/149/27Interchangeable
interchangeable cross-reference
interchangeable
149/27Interchangeable
interchangeable cross-reference
interchangeable
X5008/12/149 ITEM 27Interchangeable
interchangeable cross-reference
interchangeable
645A849H01Interchangeable
interchangeable cross-reference
interchangeable
155C290H01Interchangeable
interchangeable cross-reference
interchangeable
A-27047Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SW33556-7?
SW33556-7 is a WASHER,LOCK.
What parts can replace SW33556-7?
There are 8 known substitutes for SW33556-7: X5008/12/149/27, 149/27, X5008/12/149 ITEM 27 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for SW33556-7?
SW33556-7 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-371-7180. 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