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11557821-4 — INSERT,PANEL FASTENER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

11557821-4: INSERT,PANEL FASTENER.

The INSERT,PANEL FASTENER is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2024 OVERALL, hole_type: THREADEDTHREADED, insert_style: PROTRUDING FLANGEPROTRUDING FLANGE, body_diameter: 0.309 INCHES NOMINAL0.309 INCHES NOMINAL IN, flange_diameter: 0.625 INCHES NOMINAL0.625 INCHES NOMINAL IN, flange_thickness: 0.033 INCHES NOMINAL0.033 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-244-2390, 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
11557821-4
NSN: 5325-01-244-2390
FSC: 5325 — Fastening Devices
CAGE: 18876 — US ARMY AVIATION AND MISSILE COMMAND (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2024 OVERALL
hole_typeTHREADEDTHREADED
insert_stylePROTRUDING FLANGEPROTRUDING FLANGE
body_diameter0.309 INCHES NOMINAL0.309 INCHES NOMINAL IN
flange_diameter0.625 INCHES NOMINAL0.625 INCHES NOMINAL IN
flange_thickness0.033 INCHES NOMINAL0.033 INCHES NOMINAL IN
special_features1.240 INCHES LONG1.240 INCHES LONG IN
features_providedGROMMETGROMMET
surface_treatmentCHROMATE OVERALL
material_document_and_classificationQQ-A-225/6,T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
thread_size_and_series/type_designator0.190-32 UNF
surface_treatment_document_and_classificationMIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5325-01-244-2390
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 11557821-4 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
FLANGE DIAMETER: 0.625 INCHES NOMINAL0.625 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/6,T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
FEATURES PROVIDED: GROMMETGROMMET
•
BODY DIAMETER: 0.309 INCHES NOMINAL0.309 INCHES NOMINAL IN
•
SURFACE TREATMENT: CHROMATE OVERALL
•
INSERT STYLE: PROTRUDING FLANGEPROTRUDING FLANGE
TECHNICAL CHARACTERISTICS
FLANGE DIAMETER0.625 INCHES NOMINAL0.625 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/6,T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
FEATURES PROVIDEDGROMMETGROMMET
BODY DIAMETER0.309 INCHES NOMINAL0.309 INCHES NOMINAL IN
SPECIAL FEATURES1.240 INCHES LONG1.240 INCHES LONG IN
SURFACE TREATMENTCHROMATE OVERALL
INSERT STYLEPROTRUDING FLANGEPROTRUDING FLANGE
MATERIALALUMINUM ALLOY 2024 OVERALL
THREAD SIZE AND SERIES/TYPE DESIGNATOR0.190-32 UNF
OTHER ITEMS IN FSC 5325 — Fastening Devices
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5325-00-000-1884 5325-00-000-9988 5325-00-001-1567 5325-00-001-2043 5325-00-001-3842 5325-00-001-3858 5325-00-001-3871 5325-00-001-4317
SUBSTITUTES & CROSS-REFERENCES 1
S102F10-20Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 11557821-4?
11557821-4 is a INSERT,PANEL FASTENER.
What parts can replace 11557821-4?
There is 1 known substitute for 11557821-4: S102F10-20. Substitute compatibility should be verified for your specific system.
What is the NSN for 11557821-4?
11557821-4 is cataloged in the U.S. Government catalog under NSN 5325-01-244-2390. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.