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6744239-9 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

6744239-9: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY A OVERALL, hole_diameter: 0.509 INCHES MINIMUM AND 0.523 INCHES MAXIMUM IN, hardness_rating: 33.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM, outside_diameter: 0.873 INCHES MAXIMUM IN, style_designator: SPLIT HELICAL-RIGHT HAND, material_thickness: 0.125 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-187-2429, 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
6744239-9
NSN: 5310-00-187-2429
FSC: 5310 — Nuts and Washers
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
materialNICKEL ALLOY A OVERALL
hole_diameter0.509 INCHES MINIMUM AND 0.523 INCHES MAXIMUM IN
hardness_rating33.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM
outside_diameter0.873 INCHES MAXIMUM IN
style_designatorSPLIT HELICAL-RIGHT HAND
material_thickness0.125 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
minimum_tensile_strength155000 POUNDS PER SQUARE INCH LBS
material_document_and_classificationQQ-N-286 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-187-2429
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 6744239-9 · 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 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.873 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.125 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
•
MINIMUM TENSILE STRENGTH: 155000 POUNDS PER SQUARE INCH LBS
•
MATERIAL: NICKEL ALLOY A OVERALL
•
HOLE DIAMETER: 0.509 INCHES MINIMUM AND 0.523 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 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.873 INCHES MAXIMUM IN
MATERIAL THICKNESS0.125 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
MINIMUM TENSILE STRENGTH155000 POUNDS PER SQUARE INCH LBS
MATERIALNICKEL ALLOY A OVERALL
HOLE DIAMETER0.509 INCHES MINIMUM AND 0.523 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 8
004-003005-005Reference document
Same NSN cross-reference
Reference document — Secondary reference
MS35338-124Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
2620-709X4PC134Reference document
Same NSN cross-reference
Reference document — Secondary reference
5310001872429Reference document
Same NSN cross-reference
Reference document — Informative reference only
FF-W-84Reference document
Same NSN cross-reference
Reference document — Identification reference
SS125-2113411-6Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 6744239-9?
6744239-9 is a WASHER,LOCK.
What parts can replace 6744239-9?
There are 8 known substitutes for 6744239-9: 004-003005-005, MS35338-124, 2620-709X4PC134 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 6744239-9?
6744239-9 is cataloged in the U.S. Government catalog under NSN 5310-00-187-2429. 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.