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Technical Data Sheet
PartsTable / COMPONENT / RPA52-077-375-1750
RPA52-077-375-1750 ✓ 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 PIN,SPRING is a the manufacturer industrial component. Key specifications include diameter: 0.385 INCHES MINIMUM AND 0.392 INCHES MAXIMUM IN, material: STEEL COMP 1074 OR STEEL COMP 1095 OVERALL, overall_length: 1.730 INCHES MINIMUM AND 1.770 INCHES MAXIMUM IN, shear_strength: 17600 DOUBLE POUND, hardness_rating: 46.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM OVERALL, style_designator: SLOTTED. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-01-110-9864, 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
RPA52-077-375-1750
NSN: 5315-01-110-9864
FSC: 5315
CAGE: 72962 — HARVARD INDUSTRIES INC (USA)
SPECIFICATIONS
diameter0.385 INCHES MINIMUM AND 0.392 INCHES MAXIMUM IN
materialSTEEL COMP 1074 OR STEEL COMP 1095 OVERALL
overall_length1.730 INCHES MINIMUM AND 1.770 INCHES MAXIMUM IN
shear_strength17600 DOUBLE POUND
hardness_rating46.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM OVERALL
style_designatorSLOTTED
surface_treatmentCADMIUM OVERALL
material_thickness0.077 INCHES NOMINAL IN
supplementary_featuresSIMILAR TO NSN 5315-00-810-3704,EXC SURF. TREAT
nondefinitive_spec/std_data1 TYPE AND 2 CLASS AND A COMPOSITION
specification/standard_data81349-MIL-P-10971 GOVERNMENT SPECIFICATION
departure_from_cited_designatorAS MODIFIED BY SURFACE TREATMENT
NSN5315-01-110-9864
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: RPA52-077-375-1750 · 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
•
NONDEFINITIVE SPEC/STD DATA: 1 TYPE AND 2 CLASS AND A COMPOSITION
•
STYLE DESIGNATOR: SLOTTED
•
DEPARTURE FROM CITED DESIGNATOR: AS MODIFIED BY SURFACE TREATMENT
•
SUPPLEMENTARY FEATURES: SIMILAR TO NSN 5315-00-810-3704,EXC SURF. TREAT
•
SPECIFICATION/STANDARD DATA: 81349-MIL-P-10971 GOVERNMENT SPECIFICATION
•
MATERIAL: STEEL COMP 1074 OR STEEL COMP 1095 OVERALL
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TYPE 1,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL LENGTH1.730 INCHES MINIMUM AND 1.770 INCHES MAXIMUM IN
NONDEFINITIVE SPEC/STD DATA1 TYPE AND 2 CLASS AND A COMPOSITION
STYLE DESIGNATORSLOTTED
DEPARTURE FROM CITED DESIGNATORAS MODIFIED BY SURFACE TREATMENT
SUPPLEMENTARY FEATURESSIMILAR TO NSN 5315-00-810-3704,EXC SURF. TREAT
SPECIFICATION/STANDARD DATA81349-MIL-P-10971 GOVERNMENT SPECIFICATION
MATERIALSTEEL COMP 1074 OR STEEL COMP 1095 OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TYPE 1,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
HARDNESS RATING46.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM OVERALL
SURFACE TREATMENTCADMIUM OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
50431Interchangeable
interchangeable cross-reference
interchangeable
59-077-375-1750Interchangeable
interchangeable cross-reference
interchangeable
4107318ITEM20Interchangeable
interchangeable cross-reference
interchangeable
MIL-P-10971Interchangeable
Same NIIN cross-reference
interchangeable
NASM10971Interchangeable
Same NIIN cross-reference
interchangeable
52-077-375-1750Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is RPA52-077-375-1750?
RPA52-077-375-1750 is a PIN,SPRING.
What parts can replace RPA52-077-375-1750?
There are 6 known substitutes for RPA52-077-375-1750: 50431, 59-077-375-1750, 4107318ITEM20 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for RPA52-077-375-1750?
RPA52-077-375-1750 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-01-110-9864. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026