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EF603-3 — STUD ASSEMBLY,TURNLOCK FASTENER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

EF603-3: STUD ASSEMBLY,TURNLOCK FASTENER.

STUD ASSEMBLY,TURNLOCK FASTENER. Key specifications include diameter: 0.500 INCHES NOMINAL IN, material: STEEL COMP 4037 AND STEEL COMP 1010 AND STEEL COMP 8740 STUD, stud_assembly_style: STUD ASSEMBLY, eyelet_outside_diameter: 0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN, turnlock_stud_head_style: FLAT COUNTERSUNK, material_accommodated_thickness: 0.090 INCHES MINIMUM AND 0.119 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-443-9154, 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
EF603-3
NSN: 5325-01-443-9154
FSC: 5325 — Fastening Devices
CAGE: U7941 — LEONARDO UK LIMITED (AW/EH101) (GBR)
SPECIFICATIONS
diameter0.500 INCHES NOMINAL IN
materialSTEEL COMP 4037 AND STEEL COMP 1010 AND STEEL COMP 8740 STUD
stud_assembly_styleSTUD ASSEMBLY
eyelet_outside_diameter0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
turnlock_stud_head_styleFLAT COUNTERSUNK
material_accommodated_thickness0.090 INCHES MINIMUM AND 0.119 INCHES MAXIMUM IN
material_document_and_classificationASTM-A-228 ASSN STD SINGLE MATERIAL RESPONSE OR QQ-W-470 FED SPEC SINGLE MATERIAL RESPONSE PIN
distance_from_engaging_member_to_largest_bearing_surface_of_head0.820 INCHES NOMINAL IN
NSN5325-01-443-9154
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: EF603-3 · 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
•
MATERIAL ACCOMMODATED THICKNESS: 0.090 INCHES MINIMUM AND 0.119 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM-A-228 ASSN STD SINGLE MATERIAL RESPONSE OR QQ-W-470 FED SPEC SINGLE MATERIAL RESPONSE EJECTOR SPRING
•
DIAMETER: 0.500 INCHES NOMINAL IN
•
DISTANCE FROM ENGAGING MEMBER TO LARGEST BEARING SURFACE OF HEAD: 0.820 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
EYELET OUTSIDE DIAMETER0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
MATERIAL ACCOMMODATED THICKNESS0.090 INCHES MINIMUM AND 0.119 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONASTM-A-228 ASSN STD SINGLE MATERIAL RESPONSE OR QQ-W-470 FED SPEC SINGLE MATERIAL RESPONSE EJECTOR SPRING
MATERIAL DOCUMENT AND CLASSIFICATIONASTM-A-228 ASSN STD SINGLE MATERIAL RESPONSE OR QQ-W-470 FED SPEC SINGLE MATERIAL RESPONSE PIN
MATERIAL DOCUMENT AND CLASSIFICATIONASTM-A-547 ASSN STD 1ST MATERIAL RESPONSE OR ASTM-A-331 ASSN STD 1ST MATERIAL RESPONSE OR AMS6300 ASSN STD 1ST MATERIAL RESPONSE OR ASTM-A-304 ASSN STD 2ND MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 3RD MATERIAL RESPONSE STUD
MATERIAL DOCUMENT AND CLASSIFICATIONASTM-A-684 ASSN STD 1ST MATERIAL RESPONSE OR QQ-W-470 FED SPEC 2ND MATERIAL RESPONSE OR ASTM-A-109 ASSN STD 2ND MATERIAL RESPONSE EYELET
DIAMETER0.500 INCHES NOMINAL IN
DISTANCE FROM ENGAGING MEMBER TO LARGEST BEARING SURFACE OF HEAD0.820 INCHES NOMINAL IN
TURNLOCK STUD HEAD STYLEFLAT COUNTERSUNK
MATERIALSTEEL EJECTOR SPRING
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is EF603-3?
EF603-3 is a STUD ASSEMBLY,TURNLOCK FASTENER.
What is the NSN for EF603-3?
EF603-3 is cataloged in the U.S. Government catalog under NSN 5325-01-443-9154. This indicates validated use in U.S. government and defense supply chains.
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