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Technical Data Sheet
PartsTable / COMPONENT / 12021-4
12021-4 ✓ 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 TERMINAL,QUICK DISCONNECT is a the manufacturer industrial component. Key specifications include material: RUBBER SILICONE BODY, mesh_size: 60.0, thickness: 0.020 INCHES NOMINAL IN, design_type: REUSABLE, insert_size: 0.250 IN. DIA IN, fastener_type: BOLT.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-012-0214, 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
12021-4
NSN: 5310-00-012-0214
FSC: 5310
CAGE: 1LW55 — BORGWARNER PDS (ANDERSON), L.L.C. (USA)
SPECIFICATIONS
materialRUBBER SILICONE BODY
mesh_size60.0
thickness0.020 INCHES NOMINAL IN
design_typeREUSABLE
insert_size0.250 IN. DIA IN
fastener_typeBOLT
hole_diameter0.318 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
overall_width6.500 INCHES NOMINAL IN
wire_diameter0.01000 INCHES NOMINAL IN
body_thickness0.750 INCHES NOMINAL IN
overall_height1.000 INCHES NOMINAL IN
overall_length0.531 INCHES IN
NSN5310-00-012-0214
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 12021-4 · 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
•
SURFACE TREATMENT: CADMIUM AND ZINC OVERALL
•
NONDEFINITIVE SPEC/STD DATA: 2 STYLE AND A CLASS
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD ALL MATERIAL RESPONSES OVERALL
•
HARDNESS RATING: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
•
HOLE DIAMETER: 0.318 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 1060 OR STEEL COMP 1070 OR STEEL COMP 1078 OR STEEL COMP 1080 OVERALL
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416 FED SPEC 1ST TREATMENT RESPONSE AND QQ-Z-325 FED SPEC 2ND TREATMENT RESPONSE OVERALL
•
STYLE DESIGNATOR: SPLIT HELICAL-RIGHT HAND
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENTCADMIUM AND ZINC OVERALL
NONDEFINITIVE SPEC/STD DATA2 STYLE AND A CLASS
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
HARDNESS RATING45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
HOLE DIAMETER0.318 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
MATERIALSTEEL COMP 1060 OR STEEL COMP 1070 OR STEEL COMP 1078 OR STEEL COMP 1080 OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416 FED SPEC 1ST TREATMENT RESPONSE AND QQ-Z-325 FED SPEC 2ND TREATMENT RESPONSE OVERALL
STYLE DESIGNATORSPLIT HELICAL-RIGHT HAND
OUTSIDE DIAMETER0.586 INCHES MAXIMUM IN
MATERIAL THICKNESS0.078 INCHES MINIMUM AND 0.088 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 32
SM-B-379821Interchangeable
interchangeable cross-reference
interchangeable
12021-4Interchangeable
interchangeable cross-reference
interchangeable
103-0012-019Interchangeable
interchangeable cross-reference
interchangeable
654045PC1Interchangeable
interchangeable cross-reference
interchangeable
9272Interchangeable
interchangeable cross-reference
interchangeable
MS3211-1-SZInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 12021-4?
12021-4 is a TERMINAL,QUICK DISCONNECT.
What parts can replace 12021-4?
There are 32 known substitutes for 12021-4: SM-B-379821, 12021-4, 103-0012-019 and 29 more. Substitute compatibility should be verified for your specific system.
Is 12021-4 still available?
12021-4 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