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128-108 — WASHER,SEAL

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

128-108: WASHER,SEAL.

The WASHER,SEAL is a the manufacturer industrial component. Key specifications include width: 20.000 INCHES NOMINAL IN, length: 24.000 INCHES NOMINAL IN, material: PLASTIC, thickness: 0.002 INCHES NOMINAL IN, material_transparency: TRANSLUCENT, criticality_code_justification: HUES. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-297-8345, 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
128-108
NSN: 5310-00-297-8345
NIINs: 002978345, 010835970, 017343116
FSC: 5310 — Nuts and Washers
CAGE: 72962 — HARVARD INDUSTRIES INC (USA)
SPECIFICATIONS
width20.000 INCHES NOMINAL IN
length24.000 INCHES NOMINAL IN
materialPLASTIC
thickness0.002 INCHES NOMINAL IN
material_transparencyTRANSLUCENT
criticality_code_justificationHUES
NSN5310-00-297-8345
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 128-108 · 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
•
THREAD SERIES: UNF
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.625 INCHES IN
•
NUT DIAMETER: 1.062 INCHES NOMINAL IN
•
LOCKING FEATURE: PREVAILING TORQUE WITH NONMETALLIC INSERT
•
NUT HEIGHT: 1.281 INCHES NOMINAL IN
•
SURFACE TREATMENT: CADMIUM OVERALL
•
INTERNAL DRIVE STYLE: DOUBLE HEXAGON
TECHNICAL CHARACTERISTICS
THREAD SERIESUNF
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.625 INCHES IN
NUT DIAMETER1.062 INCHES NOMINAL IN
LOCKING FEATUREPREVAILING TORQUE WITH NONMETALLIC INSERT
NUT HEIGHT1.281 INCHES NOMINAL IN
SURFACE TREATMENTCADMIUM OVERALL
INTERNAL DRIVE STYLEDOUBLE HEXAGON
NUT STYLEINTERNAL WRENCHING
THREAD CLASS3B
SUBSTITUTES & CROSS-REFERENCES 4
12NB108Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
NAS353Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
1234065Reference document
Same NSN cross-reference
Reference document — Secondary reference
12B108Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 128-108?
128-108 is a WASHER,SEAL.
What parts can replace 128-108?
There are 4 known substitutes for 128-108: 12NB108, NAS353, 1234065 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 128-108?
128-108 is cataloged in the U.S. Government catalog under NSN 5310-00-297-8345. 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.