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426217 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

426217: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include hole_diameter: 0.128 INCHES MINIMUM AND 0.137 INCHES MAXIMUM IN, hardness_rating: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM, outside_diameter: 0.239 INCHES MAXIMUM IN, style_designator: SPLIT HELICAL-RIGHT HAND, material_thickness: 0.031 INCHES NOMINAL IN, nondefinitive_spec/std_data: A CLASS AND 2 STYLE. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-042-6217, 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
426217
NSN: 5310-00-042-6217
FSC: 5310 — Nuts and Washers
CAGE: 21450 — ARMY WEAPONS COMMAND ATTN AMSWE-REE-S (USA)
SPECIFICATIONS
hole_diameter0.128 INCHES MINIMUM AND 0.137 INCHES MAXIMUM IN
hardness_rating45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
outside_diameter0.239 INCHES MAXIMUM IN
style_designatorSPLIT HELICAL-RIGHT HAND
material_thickness0.031 INCHES NOMINAL IN
nondefinitive_spec/std_dataA CLASS AND 2 STYLE
NSN5310-00-042-6217
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 426217 · 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
•
HARDNESS RATING: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
•
STYLE DESIGNATOR: SPLIT HELICAL-RIGHT HAND
•
OUTSIDE DIAMETER: 0.239 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.031 INCHES NOMINAL IN
•
NONDEFINITIVE SPEC/STD DATA: A CLASS AND 2 STYLE
•
HOLE DIAMETER: 0.128 INCHES MINIMUM AND 0.137 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
HARDNESS RATING45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
STYLE DESIGNATORSPLIT HELICAL-RIGHT HAND
OUTSIDE DIAMETER0.239 INCHES MAXIMUM IN
MATERIAL THICKNESS0.031 INCHES NOMINAL IN
NONDEFINITIVE SPEC/STD DATAA CLASS AND 2 STYLE
HOLE DIAMETER0.128 INCHES MINIMUM AND 0.137 INCHES MAXIMUM IN
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 1
FFW84CLASSASTYLE2Reference 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 426217?
426217 is a WASHER,LOCK.
What parts can replace 426217?
There is 1 known substitute for 426217: FFW84CLASSASTYLE2. Substitute compatibility should be verified for your specific system.
What is the NSN for 426217?
426217 is cataloged in the U.S. Government catalog under NSN 5310-00-042-6217. 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.