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3503-3-BOC — EYELET,TURNLOCK FASTENER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

3503-3-BOC: EYELET,TURNLOCK FASTENER.

The EYELET,TURNLOCK FASTENER is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1010 OVERALL, eyelet_height: 0.406 INCHES NOMINAL IN, body_thickness: 0.015 INCHES NOMINAL IN, special_features: COLOR BLACK, surface_treatment: OXIDE FILM AND COPPER OVERALL, turnlock_eyelet_style: EYELET. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-004-9610, 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
3503-3-BOC
NSN: 5325-01-004-9610
FSC: 5325 — Fastening Devices
CAGE: 72794 — SOUTHCO INC (USA)
SPECIFICATIONS
materialSTEEL COMP 1010 OVERALL
eyelet_height0.406 INCHES NOMINAL IN
body_thickness0.015 INCHES NOMINAL IN
special_featuresCOLOR BLACK
surface_treatmentOXIDE FILM AND COPPER OVERALL
turnlock_eyelet_styleEYELET
eyelet_inside_diameter0.225 INCHES NOMINAL IN
largest_inside_diameter0.342 INCHES MINIMUM AND 0.347 INCHES MAXIMUM IN
material_document_and_classificationASTM 108 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationMIL-F-495 MIL SPEC 1ST TREATMENT RESPONSE AND MIL-C-14550 MIL SPEC 2ND TREATMENT RESPONSE OVERALL
NSN5325-01-004-9610
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 3503-3-BOC · 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
•
EYELET HEIGHT: 0.406 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-F-495 MIL SPEC 1ST TREATMENT RESPONSE AND MIL-C-14550 MIL SPEC 2ND TREATMENT RESPONSE OVERALL
•
LARGEST INSIDE DIAMETER: 0.342 INCHES MINIMUM AND 0.347 INCHES MAXIMUM IN
•
TURNLOCK EYELET STYLE: EYELET
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM 108 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
EYELET INSIDE DIAMETER: 0.225 INCHES NOMINAL IN
•
SURFACE TREATMENT: OXIDE FILM AND COPPER OVERALL
TECHNICAL CHARACTERISTICS
EYELET HEIGHT0.406 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-F-495 MIL SPEC 1ST TREATMENT RESPONSE AND MIL-C-14550 MIL SPEC 2ND TREATMENT RESPONSE OVERALL
LARGEST INSIDE DIAMETER0.342 INCHES MINIMUM AND 0.347 INCHES MAXIMUM IN
TURNLOCK EYELET STYLEEYELET
MATERIAL DOCUMENT AND CLASSIFICATIONASTM 108 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
EYELET INSIDE DIAMETER0.225 INCHES NOMINAL IN
SPECIAL FEATURESCOLOR BLACK
SURFACE TREATMENTOXIDE FILM AND COPPER OVERALL
MATERIALSTEEL COMP 1010 OVERALL
BODY THICKNESS0.015 INCHES NOMINAL IN
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 4
531900E99504-1Reference document
Same NSN cross-reference
Reference document — Secondary reference
136054-105Reference document
Same NSN cross-reference
Reference document — Secondary reference
PC35X547-6RBReference document
Same NSN cross-reference
Reference document — Secondary reference
PC3 1-2X547-6BLACKEBONALCReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 3503-3-BOC?
3503-3-BOC is a EYELET,TURNLOCK FASTENER.
What parts can replace 3503-3-BOC?
There are 4 known substitutes for 3503-3-BOC: 531900E99504-1, 136054-105, PC35X547-6RB and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3503-3-BOC?
3503-3-BOC is cataloged in the U.S. Government catalog under NSN 5325-01-004-9610. 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.