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Technical Data Sheet
PartsTable / COMPONENT / 6300787-37
6300787-37 ✓ 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: 0.141 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN, hardness_rating: 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM, outside_diameter: 0.275 INCHES MINIMUM AND 0.295 INCHES MAXIMUM IN, style_designator: FLAT INTERNAL TEETH, surface_treatment: CADMIUM AND CHROMATE OVERALL, material_thickness: 0.017 INCHES MINIMUM AND 0.021 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-579-0079, 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
6300787-37
NSN: 5310-00-579-0079
FSC: 5310
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
materialSTEEL COMP 1050 OR STEEL COMP 1551 OR STEEL COMP 1059 OR STEEL COMP 1060 OR STEEL COMP 1561 OR STEEL COMP 1064 OVERALL
hole_diameter0.141 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
hardness_rating40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
outside_diameter0.275 INCHES MINIMUM AND 0.295 INCHES MAXIMUM IN
style_designatorFLAT INTERNAL TEETH
surface_treatmentCADMIUM AND CHROMATE OVERALL
material_thickness0.017 INCHES MINIMUM AND 0.021 INCHES MAXIMUM IN
end_item_identificationARMORED MULTI-PURPOSE VEHICLE (AMPV)
material_document_and_classification66 FED STD ALL MATERIAL RESPONSES OVERALL
surface_treatment_document_and_classificationQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-579-0079
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 6300787-37 · 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
•
OUTSIDE DIAMETER: 0.275 INCHES MINIMUM AND 0.295 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: FLAT INTERNAL TEETH
•
SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL
•
HARDNESS RATING: 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
MATERIAL THICKNESS: 0.017 INCHES MINIMUM AND 0.021 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 1050 OR STEEL COMP 1551 OR STEEL COMP 1059 OR STEEL COMP 1060 OR STEEL COMP 1561 OR STEEL COMP 1064 OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER0.275 INCHES MINIMUM AND 0.295 INCHES MAXIMUM IN
STYLE DESIGNATORFLAT INTERNAL TEETH
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
END ITEM IDENTIFICATIONARMORED MULTI-PURPOSE VEHICLE (AMPV)
HARDNESS RATING40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
MATERIAL THICKNESS0.017 INCHES MINIMUM AND 0.021 INCHES MAXIMUM IN
MATERIALSTEEL COMP 1050 OR STEEL COMP 1551 OR STEEL COMP 1059 OR STEEL COMP 1060 OR STEEL COMP 1561 OR STEEL COMP 1064 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
HOLE DIAMETER0.141 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 32
1224Interchangeable
interchangeable cross-reference
interchangeable
1229G423Interchangeable
interchangeable cross-reference
interchangeable
115551Interchangeable
interchangeable cross-reference
interchangeable
5310PL0652572Interchangeable
interchangeable cross-reference
interchangeable
MS35333-33Interchangeable
interchangeable cross-reference
interchangeable
MILW6986Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 6300787-37?
6300787-37 is a WASHER,LOCK.
What parts can replace 6300787-37?
There are 32 known substitutes for 6300787-37: 1224, 1229G423, 115551 and 29 more. Substitute compatibility should be verified for your specific system.
Is 6300787-37 still available?
6300787-37 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026