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Technical Data Sheet
PartsTable / COMPONENT / 3M303-6-5
3M303-6-5 ✓ 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 STUD,TURNLOCK FASTENER is a the manufacturer industrial component. Key specifications include diameter: 0.523 INCHES NOMINAL IN, material: STEEL COMP 8740 OVERALL, drive_type: SOCKET, grip_length: 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN, extension_length: 0.460 INCHES NOMINAL IN, surface_treatment: CADMIUM AND CHROMATE OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-936-9691, 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
3M303-6-5
NSN: 5325-00-936-9691
FSC: 5325
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
diameter0.523 INCHES NOMINAL IN
materialSTEEL COMP 8740 OVERALL
drive_typeSOCKET
grip_length0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
extension_length0.460 INCHES NOMINAL IN
surface_treatmentCADMIUM AND CHROMATE OVERALL
securing_device_typeRING
turnlock_stud_head_styleFLAT COUNTERSUNK
stud_shank_major_diameter0.3735 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN
turnlock_stud_shank_styleSTUD SHANK
material_accommodated_thickness0.312 INCHES NOMINAL IN
material_document_and_classificationAMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5325-00-936-9691
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 3M303-6-5 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
MATERIAL: STEEL COMP 8740 OVERALL
•
EXTENSION LENGTH: 0.460 INCHES NOMINAL IN
•
DRIVE TYPE: SOCKET
•
SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
STUD SHANK MAJOR DIAMETER: 0.3735 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN
•
TURNLOCK STUD HEAD STYLE: FLAT COUNTERSUNK
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
MATERIALSTEEL COMP 8740 OVERALL
EXTENSION LENGTH0.460 INCHES NOMINAL IN
DRIVE TYPESOCKET
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
STUD SHANK MAJOR DIAMETER0.3735 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN
TURNLOCK STUD HEAD STYLEFLAT COUNTERSUNK
DIAMETER0.523 INCHES NOMINAL IN
TURNLOCK STUD SHANK STYLESTUD SHANK
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
19266-5Interchangeable
interchangeable cross-reference
interchangeable
8148650Interchangeable
interchangeable cross-reference
interchangeable
19266Interchangeable
interchangeable cross-reference
interchangeable
192665-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3M303-6-5?
3M303-6-5 is a STUD,TURNLOCK FASTENER.
What parts can replace 3M303-6-5?
There are 4 known substitutes for 3M303-6-5: 19266-5, 8148650, 19266 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3M303-6-5?
3M303-6-5 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-936-9691. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026