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Technical Data Sheet
PartsTable / COMPONENT / 639544-001
639544-001 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The EYELET,TURNLOCK FASTENER is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY OVERALL, eyelet_height: 0.175 INCHES NOMINAL IN, body_thickness: 0.015 INCHES NOMINAL IN, surface_treatment: ANODIZE OVERALL, turnlock_eyelet_style: EYELET, eyelet_inside_diameter: 0.199 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-640-9874, 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
639544-001
NSN: 5325-00-640-9874
FSC: 5325
CAGE: 14100 — STROMBERG-CARLSON CORP A PLESSEY TELECOMMUNICATIONS CO (USA)
SPECIFICATIONS
materialALUMINUM ALLOY OVERALL
eyelet_height0.175 INCHES NOMINAL IN
body_thickness0.015 INCHES NOMINAL IN
surface_treatmentANODIZE OVERALL
turnlock_eyelet_styleEYELET
eyelet_inside_diameter0.199 INCHES NOMINAL IN
largest_outside_diameter0.312 INCHES NOMINAL IN
surface_treatment_document_and_classificationMIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5325-00-640-9874
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 639544-001 · 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
•
MATERIAL: ALUMINUM ALLOY OVERALL
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
EYELET INSIDE DIAMETER: 0.199 INCHES NOMINAL IN
•
SURFACE TREATMENT: ANODIZE OVERALL
•
LARGEST OUTSIDE DIAMETER: 0.312 INCHES NOMINAL IN
•
BODY THICKNESS: 0.015 INCHES NOMINAL IN
•
TURNLOCK EYELET STYLE: EYELET
•
EYELET HEIGHT: 0.175 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALALUMINUM ALLOY OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
EYELET INSIDE DIAMETER0.199 INCHES NOMINAL IN
SURFACE TREATMENTANODIZE OVERALL
LARGEST OUTSIDE DIAMETER0.312 INCHES NOMINAL IN
BODY THICKNESS0.015 INCHES NOMINAL IN
TURNLOCK EYELET STYLEEYELET
EYELET HEIGHT0.175 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 30
SM-C-423274Interchangeable
interchangeable cross-reference
interchangeable
A6403Interchangeable
interchangeable cross-reference
interchangeable
12041Interchangeable
interchangeable cross-reference
interchangeable
12041-2Interchangeable
interchangeable cross-reference
interchangeable
12041-1Interchangeable
interchangeable cross-reference
interchangeable
131-309-3Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 639544-001?
639544-001 is a EYELET,TURNLOCK FASTENER.
What parts can replace 639544-001?
There are 30 known substitutes for 639544-001: SM-C-423274, A6403, 12041 and 27 more. Substitute compatibility should be verified for your specific system.
Is 639544-001 still available?
639544-001 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