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PartsTable / COMPONENT / 1056H57
1056H57 ✓ 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 material: STEEL OVERALL, hole_diameter: 0.167 INCHES MINIMUM AND 0.177 INCHES MAXIMUM IN, outside_diameter: 0.325 INCHES MINIMUM AND 0.336 INCHES MAXIMUM IN, style_designator: FLAT INTERNAL TEETH, surface_treatment: CADMIUM OVERALL, material_thickness: 0.018 INCHES MINIMUM AND 0.022 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-167-0877, 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
1056H57
NSN: 5310-00-167-0877
FSC: 5310
CAGE: 99872 — ENTRON INDUSTRIES LIMITED PARTNERSHIP DBA ENTRON INDUSTRIES PROPERTY DIV (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter0.167 INCHES MINIMUM AND 0.177 INCHES MAXIMUM IN
outside_diameter0.325 INCHES MINIMUM AND 0.336 INCHES MAXIMUM IN
style_designatorFLAT INTERNAL TEETH
surface_treatmentCADMIUM OVERALL
material_thickness0.018 INCHES MINIMUM AND 0.022 INCHES MAXIMUM IN
NSN5310-00-167-0877
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1056H57 · 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
•
HOLE DIAMETER: 0.167 INCHES MINIMUM AND 0.177 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 0.325 INCHES MINIMUM AND 0.336 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.018 INCHES MINIMUM AND 0.022 INCHES MAXIMUM IN
•
MATERIAL: STEEL OVERALL
•
STYLE DESIGNATOR: FLAT INTERNAL TEETH
•
SURFACE TREATMENT: CADMIUM OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
HOLE DIAMETER0.167 INCHES MINIMUM AND 0.177 INCHES MAXIMUM IN
OUTSIDE DIAMETER0.325 INCHES MINIMUM AND 0.336 INCHES MAXIMUM IN
MATERIAL THICKNESS0.018 INCHES MINIMUM AND 0.022 INCHES MAXIMUM IN
MATERIALSTEEL OVERALL
STYLE DESIGNATORFLAT INTERNAL TEETH
SURFACE TREATMENTCADMIUM OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
5520Interchangeable
interchangeable cross-reference
interchangeable
BT5520Interchangeable
interchangeable cross-reference
interchangeable
B107.19 TY1CL1STAInterchangeable
interchangeable cross-reference
interchangeable
0500Interchangeable
interchangeable cross-reference
interchangeable
120800Interchangeable
interchangeable cross-reference
interchangeable
66995Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1056H57?
1056H57 is a WASHER,LOCK.
What parts can replace 1056H57?
There are 12 known substitutes for 1056H57: 5520, BT5520, B107.19 TY1CL1STA and 9 more. Substitute compatibility should be verified for your specific system.
Is 1056H57 still available?
1056H57 is currently cancelled.
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Last verified: July 2026