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PartsTable / COMPONENT / C3198-4-4
C3198-4-4 ✓ 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: 0.358 INCHES NOMINAL IN, material: STEEL COMP 8740 OVERALL, drive_type: SOCKET, grip_length: 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN, minor_diameter: 0.219 INCHES NOMINAL IN, extension_length: 0.361 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-869-4290, 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
C3198-4-4
NSN: 5325-00-869-4290
FSC: 5325
CAGE: 81755 — LOCKHEED MARTIN CORPORATION DIV LOCKHEED MARTIN AERONAUTICS COMPANY (USA)
SPECIFICATIONS
diameter0.358 INCHES NOMINAL IN
materialSTEEL COMP 8740 OVERALL
drive_typeSOCKET
grip_length0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
minor_diameter0.219 INCHES NOMINAL IN
extension_length0.361 INCHES NOMINAL IN
surface_treatmentCADMIUM AND CHROMATE OVERALL
securing_device_typeRING
turnlock_stud_head_styleFLAT COUNTERSUNK
stud_shank_major_diameter0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN
turnlock_stud_shank_styleSTUD SHANK
material_accommodated_thickness0.197 INCHES MINIMUM AND 0.258 INCHES MAXIMUM IN
NSN5325-00-869-4290
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: C3198-4-4 · 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
•
STUD THREAD SIZE AND SERIES/TYPE DESIGNATOR: 0.164-32 UNIFIED NATIONAL COARSE (UNC)
•
SECURING DEVICE TYPE: RING
•
DRIVE TYPE: SOCKET
•
SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
MATERIAL: STEEL COMP 8740 OVERALL
•
TURNLOCK STUD HEAD STYLE: FLAT COUNTERSUNK
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-6049 MIL SPEC 1ST MATERIAL RESPONSE OR AMS 6322 ASSN STD 2ND MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
STUD THREAD SIZE AND SERIES/TYPE DESIGNATOR0.164-32 UNIFIED NATIONAL COARSE (UNC)
SECURING DEVICE TYPERING
DRIVE TYPESOCKET
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
MATERIALSTEEL COMP 8740 OVERALL
TURNLOCK STUD HEAD STYLEFLAT COUNTERSUNK
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-6049 MIL SPEC 1ST MATERIAL RESPONSE OR AMS 6322 ASSN STD 2ND MATERIAL RESPONSE OVERALL
MINOR DIAMETER0.219 INCHES NOMINAL IN
TURNLOCK STUD SHANK STYLESTUD SHANK
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
192844Interchangeable
interchangeable cross-reference
interchangeable
A-A-55126CInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is C3198-4-4?
C3198-4-4 is a STUD,TURNLOCK FASTENER.
What parts can replace C3198-4-4?
There are 2 known substitutes for C3198-4-4: 192844, A-A-55126C. Substitute compatibility should be verified for your specific system.
What is the NSN for C3198-4-4?
C3198-4-4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-869-4290. This indicates validated use in U.S. government and defense supply chains.
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PartsTable Design LLC · partstable.com
Last verified: July 2026