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Technical Data Sheet
PartsTable / COMPONENT / 1608-00-00-4000
1608-00-00-4000 ✓ 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 hole_diameter: 0.168 INCHES NOMINAL IN, outside_diameter: 0.381 INCHES NOMINAL IN, style_designator: FLAT EXTERNAL TEETH, material_thickness: 0.020 INCHES NOMINAL IN, material_document_and_classification: 66 FED STD ALL MATERIAL RESPONSES OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-110-7934, 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
1608-00-00-4000
NSN: 5310-01-110-7934
FSC: 5310
CAGE: 78189 — ITW SHAKEPROOF AUTOMOTIVE PRODUCTS (USA)
SPECIFICATIONS
hole_diameter0.168 INCHES NOMINAL IN
outside_diameter0.381 INCHES NOMINAL IN
style_designatorFLAT EXTERNAL TEETH
material_thickness0.020 INCHES NOMINAL IN
material_document_and_classification66 FED STD ALL MATERIAL RESPONSES OVERALL
NSN5310-01-110-7934
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1608-00-00-4000 · 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
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD ALL MATERIAL RESPONSES OVERALL
•
MATERIAL THICKNESS: 0.020 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 0.381 INCHES NOMINAL IN
•
STYLE DESIGNATOR: FLAT EXTERNAL TEETH
•
HOLE DIAMETER: 0.168 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
MATERIAL THICKNESS0.020 INCHES NOMINAL IN
OUTSIDE DIAMETER0.381 INCHES NOMINAL IN
STYLE DESIGNATORFLAT EXTERNAL TEETH
HOLE DIAMETER0.168 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
PEF90S/4P-12Interchangeable
interchangeable cross-reference
interchangeable
Z128Interchangeable
interchangeable cross-reference
interchangeable
25G227Interchangeable
interchangeable cross-reference
interchangeable
Z99505XR1CJ3Interchangeable
interchangeable cross-reference
interchangeable
99505X1292ANG25Interchangeable
interchangeable cross-reference
interchangeable
99505X1292EInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1608-00-00-4000?
1608-00-00-4000 is a WASHER,LOCK.
What parts can replace 1608-00-00-4000?
There are 11 known substitutes for 1608-00-00-4000: PEF90S/4P-12, Z128, 25G227 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1608-00-00-4000?
1608-00-00-4000 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-110-7934. 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