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1EAK7 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

1EAK7: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include material: STEEL COMP 410 OVERALL, hole_diameter: 0.256 INCHES NOMINAL IN, outside_diameter: 0.478 INCHES NOMINAL IN, special_features: FITS BOLT SIZES: 0.250 INCH NOMINAL;ROCKWELL HARDNESS: C40 TO C50;MEETS/EXCEEDS: ASME B18.21.1 IN, style_designator: COUNTERSINK EXTERNAL TEETH, material_thickness: 0.022 INCHES MINIMUM AND 0.025 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-657-1770, 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
1EAK7
NSN: 5310-01-657-1770
FSC: 5310 — Nuts and Washers
CAGE: 25795 — W.W. GRAINGER, INC. DIV GOVERNMENT SALES DIVISION (USA)
SPECIFICATIONS
materialSTEEL COMP 410 OVERALL
hole_diameter0.256 INCHES NOMINAL IN
outside_diameter0.478 INCHES NOMINAL IN
special_featuresFITS BOLT SIZES: 0.250 INCH NOMINAL;ROCKWELL HARDNESS: C40 TO C50;MEETS/EXCEEDS: ASME B18.21.1 IN
style_designatorCOUNTERSINK EXTERNAL TEETH
material_thickness0.022 INCHES MINIMUM AND 0.025 INCHES MAXIMUM IN
external_key_quantity12
end_item_identification6150-01-633-6567;LOAD BANK,ELECTRICAL
part_name_assigned_by_controlling_agencyLOCK WASHER
NSN5310-01-657-1770
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1EAK7 · 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
•
STYLE DESIGNATOR: COUNTERSINK EXTERNAL TEETH
•
OUTSIDE DIAMETER: 0.478 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.022 INCHES MINIMUM AND 0.025 INCHES MAXIMUM IN
•
EXTERNAL KEY QUANTITY: 12
•
COLOR: SILVER OVERALL
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORCOUNTERSINK EXTERNAL TEETH
OUTSIDE DIAMETER0.478 INCHES NOMINAL IN
MATERIAL THICKNESS0.022 INCHES MINIMUM AND 0.025 INCHES MAXIMUM IN
EXTERNAL KEY QUANTITY12
COLORSILVER OVERALL
SPECIAL FEATURESFITS BOLT SIZES: 0.250 INCH NOMINAL;ROCKWELL HARDNESS: C40 TO C50;MEETS/EXCEEDS: ASME B18.21.1 IN
PART NAME ASSIGNED BY CONTROLLING AGENCYLOCK WASHER
END ITEM IDENTIFICATION6150-01-633-6567;LOAD BANK,ELECTRICAL
MATERIALSTEEL COMP 410 OVERALL
HOLE DIAMETER0.256 INCHES NOMINAL 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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1EAK7?
1EAK7 is a WASHER,LOCK.
What is the NSN for 1EAK7?
1EAK7 is cataloged in the U.S. Government catalog under NSN 5310-01-657-1770. This indicates validated use in U.S. government and defense supply chains.
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