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PartsTable / COMPONENT / SS399-1-23-A
SS399-1-23-A ✓ 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: 0.562 INCHES NOMINAL IN, material: STEEL COMP 1008 OVERALL, drive_type: SLOTTED, grip_length: 0.760 INCHES NOMINAL IN, shank_neck_length: 0.605 INCHES NOMINAL IN, surface_treatment: CHROMATE AND ZINC 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 5325-00-051-6791, 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
SS399-1-23-A
NSN: 5325-00-051-6791
FSC: 5325
CAGE: 98437 — ELLIS & WATTS INTERNATIONAL, LLC (USA)
SPECIFICATIONS
diameter0.562 INCHES NOMINAL IN
materialSTEEL COMP 1008 OVERALL
drive_typeSLOTTED
grip_length0.760 INCHES NOMINAL IN
shank_neck_length0.605 INCHES NOMINAL IN
surface_treatmentCHROMATE AND ZINC OVERALL
securing_device_typeRING
turnlock_stud_head_styleFILLISTER
stud_shank_major_diameter0.290 INCHES NOMINAL IN
turnlock_stud_shank_styleSTUD SHANK
material_accommodated_thickness0.490 INCHES MINIMUM AND 0.509 INCHES MAXIMUM IN
surface_treatment_document_and_classificationMIL-C-87115 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5325-00-051-6791
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: SS399-1-23-A · 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 STUD SHANK STYLE: STUD SHANK
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-C-87115 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
SECURING DEVICE TYPE: RING
•
SURFACE TREATMENT: CHROMATE AND ZINC OVERALL
•
DIAMETER: 0.562 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 1008 OVERALL
•
MATERIAL ACCOMMODATED THICKNESS: 0.490 INCHES MINIMUM AND 0.509 INCHES MAXIMUM IN
•
STUD SHANK MAJOR DIAMETER: 0.290 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
TURNLOCK STUD SHANK STYLESTUD SHANK
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-87115 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
SECURING DEVICE TYPERING
SURFACE TREATMENTCHROMATE AND ZINC OVERALL
DIAMETER0.562 INCHES NOMINAL IN
MATERIALSTEEL COMP 1008 OVERALL
MATERIAL ACCOMMODATED THICKNESS0.490 INCHES MINIMUM AND 0.509 INCHES MAXIMUM IN
STUD SHANK MAJOR DIAMETER0.290 INCHES NOMINAL IN
DRIVE TYPESLOTTED
SHANK NECK LENGTH0.605 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
SC-B-69638Interchangeable
interchangeable cross-reference
interchangeable
50500Interchangeable
interchangeable cross-reference
interchangeable
5228003Interchangeable
interchangeable cross-reference
interchangeable
50500-1Interchangeable
interchangeable cross-reference
interchangeable
50500-08Interchangeable
interchangeable cross-reference
interchangeable
3075S2-8DInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SS399-1-23-A?
SS399-1-23-A is a STUD,TURNLOCK FASTENER.
What parts can replace SS399-1-23-A?
There are 21 known substitutes for SS399-1-23-A: SC-B-69638, 50500, 5228003 and 18 more. Substitute compatibility should be verified for your specific system.
What is the NSN for SS399-1-23-A?
SS399-1-23-A is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-051-6791. 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