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Technical Data Sheet
PartsTable / COMPONENT / 530851-1
530851-1 ✓ 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

CONNECTOR,RECEPTACLE,ELECTRICAL. Key specifications include height: 0.025 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN, material: STEEL OR STEEL COMP 316 OVERALL, head_style: FLAT, surface_finish: 63.0 MICROINCHES SHOULDER END, first_end_style: CHAMFERED, style_designator: SHOULDER. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-385-9243, 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
530851-1
NSN: 5315-00-385-9243
FSC: 5315
CAGE: 70210 — HONEYWELL INTERNATIONAL INC. DIV AEROSPACE - TORRANCE (USA)
SPECIFICATIONS
height0.025 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN
materialSTEEL OR STEEL COMP 316 OVERALL
head_styleFLAT
surface_finish63.0 MICROINCHES SHOULDER END
first_end_styleCHAMFERED
style_designatorSHOULDER
first_step_length0.100 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
pin_head_diameter0.300 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN
under_head_length0.340 INCHES MINIMUM AND 0.365 INCHES MAXIMUM IN
second_step_length0.220 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN
first_step_diameter0.2510 INCHES MINIMUM AND 0.2515 INCHES MAXIMUM IN
second_step_diameter0.2494 INCHES MINIMUM AND 0.2499 INCHES MAXIMUM IN
NSN5315-00-385-9243
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 530851-1 · 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
•
PIN HEAD DIAMETER: 0.300 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN
•
FIRST STEP LENGTH: 0.100 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
•
FIRST STEP DIAMETER: 0.2510 INCHES MINIMUM AND 0.2515 INCHES MAXIMUM IN
•
MATERIAL: STEEL OR STEEL COMP 316 OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-764 TYPE 303 FED SPEC 1ST MATERIAL RESPONSE OR MIL-S-7720 COMP 316 MIL SPEC 2ND MATERIAL RESPONSE OVERALL
•
SURFACE FINISH: 63.0 MICROINCHES LARGE SHANK
•
FIRST END STYLE: CHAMFERED
TECHNICAL CHARACTERISTICS (FLIS)
PIN HEAD DIAMETER0.300 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN
FIRST STEP LENGTH0.100 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
FIRST STEP DIAMETER0.2510 INCHES MINIMUM AND 0.2515 INCHES MAXIMUM IN
MATERIALSTEEL OR STEEL COMP 316 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-764 TYPE 303 FED SPEC 1ST MATERIAL RESPONSE OR MIL-S-7720 COMP 316 MIL SPEC 2ND MATERIAL RESPONSE OVERALL
SURFACE FINISH63.0 MICROINCHES LARGE SHANK
FIRST END STYLECHAMFERED
SURFACE FINISH250.0 MICROINCHES BOTH ENDS
HEAD STYLEFLAT
SECOND STEP DIAMETER0.2494 INCHES MINIMUM AND 0.2499 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
565972Interchangeable
interchangeable cross-reference
interchangeable
31-4890-1Interchangeable
interchangeable cross-reference
interchangeable
10684234Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 530851-1?
530851-1 is a CONNECTOR,RECEPTACLE,ELECTRICAL.
What parts can replace 530851-1?
There are 3 known substitutes for 530851-1: 565972, 31-4890-1, 10684234. Substitute compatibility should be verified for your specific system.
What is the NSN for 530851-1?
530851-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-385-9243. 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