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PartsTable / COMPONENT / S1021
S1021 ✓ 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

CAPACITOR,FIXED,PLASTIC DIELECTR. Key specifications include material: STEEL CORROSION RESISTING OVERALL, load_type: INDUCTIVE AND RESISTIVE, thickness: 0.156 INCHES MINIMUM AND 0.157 INCHES MAXIMUM IN, bore_shape: STRAIGHT, head_style: MUSHROOM, key_height: 0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-011-4813, 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
S1021
NSN: 5315-00-011-4813
FSC: 5315
CAGE: 64161 — WEAVER DIV OF DURA CORP (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
load_typeINDUCTIVE AND RESISTIVE
thickness0.156 INCHES MINIMUM AND 0.157 INCHES MAXIMUM IN
bore_shapeSTRAIGHT
head_styleMUSHROOM
key_height0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
stem_styleDOUBLE GROOVED
head_height0.0630 INCHES MINIMUM AND 0.1140 INCHES MAXIMUM IN
neck_radius0.3125 INCHES NOMINAL IN
stem_length5.5525 INCHES MINIMUM AND 5.5625 INCHES MAXIMUM IN
bore_diameter0.1875 INCHES NOMINAL IN
overall_width0.1562 INCHES NOMINAL IN
NSN5315-00-011-4813
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: S1021 · 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
•
THICKNESS: 0.156 INCHES MINIMUM AND 0.157 INCHES MAXIMUM IN
•
CIRCLE DIAMETER: 0.865 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
•
STARTING EDGE RADIUS: 0.010 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN
•
STARTING EDGE SHAPE: ROUND
•
STYLE DESIGNATOR: ROUND BOTTOM
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-633 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
KEY SIZE DESIGNATION: WOODRUFF 10
•
HARDNESS RATING: 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
TYPICAL APPLICATIONS
  • RAID cache protection during power loss events
  • Write-back cache enablement for storage controllers
  • Enterprise server data integrity assurance
  • Hot-swap battery/capacitor replacement in production
TECHNICAL CHARACTERISTICS (FLIS)
THICKNESS0.156 INCHES MINIMUM AND 0.157 INCHES MAXIMUM IN
CIRCLE DIAMETER0.865 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
STARTING EDGE RADIUS0.010 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN
STARTING EDGE SHAPEROUND
STYLE DESIGNATORROUND BOTTOM
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-633 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
KEY SIZE DESIGNATIONWOODRUFF 10
HARDNESS RATING40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
MATERIALSTEEL OVERALL
KEY HEIGHT0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
S-1021Interchangeable
interchangeable cross-reference
interchangeable
AA300-128-1CW 5/16BORE/STEELInterchangeable
interchangeable cross-reference
interchangeable
M-1965Interchangeable
interchangeable cross-reference
interchangeable
114813Interchangeable
interchangeable cross-reference
interchangeable
945827Interchangeable
interchangeable cross-reference
interchangeable
25501-5SInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is S1021?
S1021 is a CAPACITOR,FIXED,PLASTIC DIELECTR.
What parts can replace S1021?
There are 16 known substitutes for S1021: S-1021, AA300-128-1CW 5/16BORE/STEEL, M-1965 and 13 more. Substitute compatibility should be verified for your specific system.
What is the NSN for S1021?
S1021 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-011-4813. 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