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BACW10EC4M — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

BACW10EC4M: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY K-500 AND NICKEL ALLOY 502 OVERALL, hole_diameter: 0.252 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN, hardness_rating: 33.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM, outside_diameter: 0.487 INCHES MAXIMUM IN, style_designator: SPLIT HELICAL-RIGHT HAND, material_thickness: 0.062 INCHES MINIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-589-6935, 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
BACW10EC4M
NSN: 5310-01-589-6935
FSC: 5310 — Nuts and Washers
CAGE: 81205 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialNICKEL ALLOY K-500 AND NICKEL ALLOY 502 OVERALL
hole_diameter0.252 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
hardness_rating33.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM
outside_diameter0.487 INCHES MAXIMUM IN
style_designatorSPLIT HELICAL-RIGHT HAND
material_thickness0.062 INCHES MINIMUM IN
material_document_and_classificationQQ-N-286, FORM 2 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-01-589-6935
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: BACW10EC4M · 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: 33.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM
•
STYLE DESIGNATOR: SPLIT HELICAL-RIGHT HAND
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-286, FORM 2 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.487 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.062 INCHES MINIMUM IN
•
MATERIAL: NICKEL ALLOY K-500 AND NICKEL ALLOY 502 OVERALL
•
HOLE DIAMETER: 0.252 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
HARDNESS RATING33.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM
STYLE DESIGNATORSPLIT HELICAL-RIGHT HAND
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-286, FORM 2 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.487 INCHES MAXIMUM IN
MATERIAL THICKNESS0.062 INCHES MINIMUM IN
MATERIALNICKEL ALLOY K-500 AND NICKEL ALLOY 502 OVERALL
HOLE DIAMETER0.252 INCHES MINIMUM AND 0.260 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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is BACW10EC4M?
BACW10EC4M is a WASHER,LOCK.
What is the NSN for BACW10EC4M?
BACW10EC4M is cataloged in the U.S. Government catalog under NSN 5310-01-589-6935. 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.