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3874371 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

3874371: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 2.500 INCHES NOMINAL IN, outside_diameter: 3.000 INCHES NOMINAL IN, material_thickness: 0.090 INCHES NOMINAL IN, external_prebent_key_width: 0.220 INCHES NOMINAL IN, external_prebent_key_length: 0.500 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-007-0078, 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
3874371
NSN: 5310-00-007-0078
FSC: 5310 — Nuts and Washers
CAGE: 24617 — GENERAL MOTORS CORP (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter2.500 INCHES NOMINAL IN
outside_diameter3.000 INCHES NOMINAL IN
material_thickness0.090 INCHES NOMINAL IN
external_key_quantity8
external_prebent_key_width0.220 INCHES NOMINAL IN
external_prebent_key_length0.500 INCHES NOMINAL IN
overall_distance_including_keys3.830 INCHES NOMINAL IN
NSN5310-00-007-0078
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 3874371 · 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
•
EXTERNAL PREBENT KEY LENGTH: 0.500 INCHES NOMINAL IN
•
OVERALL DISTANCE INCLUDING KEYS: 3.830 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 3.000 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.090 INCHES NOMINAL IN
•
EXTERNAL KEY QUANTITY: 8
•
EXTERNAL PREBENT KEY WIDTH: 0.220 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
HOLE DIAMETER: 2.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
EXTERNAL PREBENT KEY LENGTH0.500 INCHES NOMINAL IN
OVERALL DISTANCE INCLUDING KEYS3.830 INCHES NOMINAL IN
OUTSIDE DIAMETER3.000 INCHES NOMINAL IN
MATERIAL THICKNESS0.090 INCHES NOMINAL IN
EXTERNAL KEY QUANTITY8
EXTERNAL PREBENT KEY WIDTH0.220 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
HOLE DIAMETER2.500 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 3874371?
3874371 is a WASHER,KEY.
What is the NSN for 3874371?
3874371 is cataloged in the U.S. Government catalog under NSN 5310-00-007-0078. 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.