PartsTable
Technical Data Sheet
20-2057 ✓ 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,VARIABLE,GLASS DIELECT. Key specifications include material: ALUMINUM ALLOY 6061 OVERALL, thread_class: 3B SECOND END, connection_type: THREADED EXTERNAL PIPE FIRST END, connection_style: GASKET SEAL (BOSS) SECOND END, nominal_thread_size: 0.500 INCHES FIRST END IN, nominal_overall_length: 0.380 INCHES IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-015-6648, 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
20-2057
NSN: 5310-01-015-6648
FSC: 5310
CAGE: 1EM77 — B & B SPECIALTIES INC DBA GS AEROSPACE DIV GS AEROSPACE (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 6061 OVERALL
thread_class3B SECOND END
connection_typeTHREADED EXTERNAL PIPE FIRST END
connection_styleGASKET SEAL (BOSS) SECOND END
nominal_thread_size0.500 INCHES FIRST END IN
nominal_overall_length0.380 INCHES IN
end_item_identification6115013697465
thread_series_designatorNPT FIRST END
material_document_and_classificationQQ-A-2048 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationMIL-C-5541,CLASS 1A MIL SPEC SINGLE TREATMENT RESPONSE OVERALL A
NSN5310-01-015-6648
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 20-2057 · 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 OVERALL
COUNTERSINK ANGLE: 90.0 DEGREES NOMINAL NUT
MATERIAL: STEEL COMP 1137 OR STEEL COMP 1141 OR STEEL COMP 4130 OR STEEL COMP 4140 OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-637 FED SPEC 1ST MATERIAL RESPONSE OR QQ-S-637 FED SPEC 2ND MATERIAL RESPONSE OR MIL-S-6758 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-5626 MIL SPEC 4TH MATERIAL RESPONSE OVERALL
WIDTH ACROSS FLATS: 0.621 INCHES MINIMUM AND 0.628 INCHES MAXIMUM IN
THREAD QUANTITY PER INCH: 24
THREAD SERIES: UNF
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)
SURFACE TREATMENTCADMIUM OVERALL
COUNTERSINK ANGLE90.0 DEGREES NOMINAL NUT
MATERIALSTEEL COMP 1137 OR STEEL COMP 1141 OR STEEL COMP 4130 OR STEEL COMP 4140 OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-637 FED SPEC 1ST MATERIAL RESPONSE OR QQ-S-637 FED SPEC 2ND MATERIAL RESPONSE OR MIL-S-6758 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-5626 MIL SPEC 4TH MATERIAL RESPONSE OVERALL
WIDTH ACROSS FLATS0.621 INCHES MINIMUM AND 0.628 INCHES MAXIMUM IN
THREAD QUANTITY PER INCH24
THREAD SERIESUNF
NOMINAL THREAD SIZE0.375 INCHES IN
THREAD CLASS3B
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
80245-1Interchangeable
interchangeable cross-reference
interchangeable
20-2057Interchangeable
interchangeable cross-reference
interchangeable
20-2052Interchangeable
interchangeable cross-reference
interchangeable
202094-1Interchangeable
interchangeable cross-reference
interchangeable
202057-1Interchangeable
interchangeable cross-reference
interchangeable
AN924-3Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 20-2057?
20-2057 is a CAPACITOR,VARIABLE,GLASS DIELECT.
What parts can replace 20-2057?
There are 8 known substitutes for 20-2057: 80245-1, 20-2057, 20-2052 and 5 more. Substitute compatibility should be verified for your specific system.
Is 20-2057 still available?
20-2057 is currently cancelled.
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