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C393-4-4-2 — Technical Data Sheet

✓ 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 RECEPTACLE,TURNLOCK FASTENER is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1050 RETAINER, mounting_style: PLAIN W/MOUNTING HOLE, receptacle_width: 0.410 INCHES MAXIMUM IN, special_features: STUD PROTRUSION 0.125 IN. NOM LENGTH IN, receptacle_height: 0.332 INCHES MAXIMUM 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 under NSN 5325-00-197-2814, 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
C393-4-4-2
NSN: 5325-00-197-2814
FSC: 5325
CAGE: 81755 — LOCKHEED MARTIN CORPORATION DIV LOCKHEED MARTIN AERONAUTICS COMPANY (USA)
SPECIFICATIONS
materialSTEEL COMP 1050 RETAINER
mounting_stylePLAIN W/MOUNTING HOLE
receptacle_width0.410 INCHES MAXIMUM IN
special_featuresSTUD PROTRUSION 0.125 IN. NOM LENGTH IN
receptacle_height0.332 INCHES MAXIMUM IN
surface_treatmentCADMIUM AND CHROMATE OVERALL
receptacle_overall_length1.012 INCHES MAXIMUM IN
turnlock_receptacle_styleRECEPTACLE
turnlock_mounting_hole_diameter0.098 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN
material_document_and_classificationAMS 6322 ASSN STD SINGLE MATERIAL RESPONSE BARREL
surface_treatment_document_and_classificationQQ-P-416 TY 2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
center_to_center_distance_between_mounting_holes0.748 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN
NSN5325-00-197-2814
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: C393-4-4-2 · 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
•
TURNLOCK RECEPTACLE STYLE: RECEPTACLE
•
SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL
•
MOUNTING STYLE: PLAIN W/MOUNTING HOLE
•
MATERIAL: STEEL COMP 1050 RETAINER
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE BARREL
•
TURNLOCK MOUNTING HOLE DIAMETER: 0.098 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
TURNLOCK RECEPTACLE STYLERECEPTACLE
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
MOUNTING STYLEPLAIN W/MOUNTING HOLE
MATERIALSTEEL COMP 1050 RETAINER
MATERIALSTEEL COMP 8740 BARREL
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 6322 ASSN STD SINGLE MATERIAL RESPONSE BARREL
TURNLOCK MOUNTING HOLE DIAMETER0.098 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN
MATERIALSTEEL COMP 8740 STUD
MATERIAL DOCUMENT AND CLASSIFICATIONASM 6322 ASSN STD SINGLE MATERIAL RESPONSE STUD
CENTER TO CENTER DISTANCE BETWEEN MOUNTING HOLES0.748 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
C393InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
90954InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
277715InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
810317-407InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
810317-403InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is C393-4-4-2?
C393-4-4-2 is a RECEPTACLE,TURNLOCK FASTENER.
What parts can replace C393-4-4-2?
There are 5 known substitutes for C393-4-4-2: C393, 90954, 277715 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for C393-4-4-2?
C393-4-4-2 is cataloged in the Federal Logistics Information System under NSN 5325-00-197-2814. This indicates validated use in U.S. government and defense supply chains.
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Last verified: October 2026