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ES441-60 — STUD ASSEMBLY,TURNLOCK FASTENER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

ES441-60: STUD ASSEMBLY,TURNLOCK FASTENER.

STUD ASSEMBLY,TURNLOCK FASTENER. Key specifications include diameter: 0.298 INCHES MINIMUM AND 0.308 INCHES MAXIMUM IN, material: STEEL OVERALL, drive_type: CROSS RECESS, eyelet_length: 0.322 INCHES NOMINAL IN, stud_head_height: 0.056 INCHES MINIMUM AND 0.066 INCHES MAXIMUM IN, surface_treatment: CADMIUM OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-056-3889, 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
ES441-60
NSN: 5325-00-056-3889
FSC: 5325 — Fastening Devices
CAGE: 20418 — DRS SUSTAINMENT SYSTEMS, INC. (USA)
SPECIFICATIONS
diameter0.298 INCHES MINIMUM AND 0.308 INCHES MAXIMUM IN
materialSTEEL OVERALL
drive_typeCROSS RECESS
eyelet_length0.322 INCHES NOMINAL IN
stud_head_height0.056 INCHES MINIMUM AND 0.066 INCHES MAXIMUM IN
surface_treatmentCADMIUM OVERALL
stud_assembly_styleSTUD ASSEMBLY
securing_device_typeWASHER
eyelet_outside_diameter0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
turnlock_stud_head_styleFLAT FILLISTER
material_accommodated_thickness0.360 INCHES MINIMUM AND 0.419 INCHES MAXIMUM IN
distance_from_engaging_member_to_largest_bearing_surface_of_head0.903 INCHES MINIMUM AND 0.918 INCHES MAXIMUM IN
NSN5325-00-056-3889
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: ES441-60 · 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 OUTSIDE DIAMETER: 0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
•
DRIVE TYPE: CROSS RECESS
•
MATERIAL ACCOMMODATED THICKNESS: 0.360 INCHES MINIMUM AND 0.419 INCHES MAXIMUM IN
•
DIAMETER: 0.298 INCHES MINIMUM AND 0.308 INCHES MAXIMUM IN
•
STUD HEAD HEIGHT: 0.056 INCHES MINIMUM AND 0.066 INCHES MAXIMUM IN
•
SECURING DEVICE TYPE: WASHER
•
DISTANCE FROM ENGAGING MEMBER TO LARGEST BEARING SURFACE OF HEAD: 0.903 INCHES MINIMUM AND 0.918 INCHES MAXIMUM IN
•
TURNLOCK STUD HEAD STYLE: FLAT FILLISTER
TECHNICAL CHARACTERISTICS
EYELET OUTSIDE DIAMETER0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
DRIVE TYPECROSS RECESS
MATERIAL ACCOMMODATED THICKNESS0.360 INCHES MINIMUM AND 0.419 INCHES MAXIMUM IN
DIAMETER0.298 INCHES MINIMUM AND 0.308 INCHES MAXIMUM IN
STUD HEAD HEIGHT0.056 INCHES MINIMUM AND 0.066 INCHES MAXIMUM IN
SECURING DEVICE TYPEWASHER
DISTANCE FROM ENGAGING MEMBER TO LARGEST BEARING SURFACE OF HEAD0.903 INCHES MINIMUM AND 0.918 INCHES MAXIMUM IN
TURNLOCK STUD HEAD STYLEFLAT FILLISTER
SURFACE TREATMENTCADMIUM OVERALL
MATERIALSTEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES 2
2600-13Reference document
Same NSN cross-reference
Reference document — Secondary reference
26S8-13Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is ES441-60?
ES441-60 is a STUD ASSEMBLY,TURNLOCK FASTENER.
What parts can replace ES441-60?
There are 2 known substitutes for ES441-60: 2600-13, 26S8-13. Substitute compatibility should be verified for your specific system.
What is the NSN for ES441-60?
ES441-60 is cataloged in the U.S. Government catalog under NSN 5325-00-056-3889. 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.