PartsTable
Technical Data Sheet
Download PDF

28S19-4 — STUD ASSEMBLY,TURNLOCK FASTENER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

28S19-4: STUD ASSEMBLY,TURNLOCK FASTENER.

STUD ASSEMBLY,TURNLOCK FASTENER. Key specifications include diameter: 0.489 INCHES MINIMUM AND 0.511 INCHES MAXIMUM IN, material: STEEL STUD, drive_type: CROSS RECESS, stud_diameter: 0.124 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN, surface_treatment: NICKEL EYELET, stud_assembly_style: STUD ASSEMBLY. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-568-8955, 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
28S19-4
NSN: 5325-01-568-8955
FSC: 5325 — Fastening Devices
CAGE: 71286 — HOWMET GLOBAL FASTENING SYSTEMS INC DIV CAMLOC PRODUCTS (USA)
SPECIFICATIONS
diameter0.489 INCHES MINIMUM AND 0.511 INCHES MAXIMUM IN
materialSTEEL STUD
drive_typeCROSS RECESS
stud_diameter0.124 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
surface_treatmentNICKEL EYELET
stud_assembly_styleSTUD ASSEMBLY
securing_device_typeSPRING
eyelet_outside_diameter0.519 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN
turnlock_stud_head_styleFILLISTER
material_accommodated_thickness0.090 INCHES MINIMUM AND 0.119 INCHES MAXIMUM IN
part_name_assigned_by_controlling_agencySTUD ASSEMBLY EXTERNALLY SPRING LOADED CROSS RECESS HEAD NICKEL PLATED
distance_from_engaging_member_to_largest_bearing_surface_of_head0.310 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN
NSN5325-01-568-8955
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 28S19-4 · 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
•
EYELET OUTSIDE DIAMETER: 0.519 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN
•
DRIVE TYPE: CROSS RECESS
•
MATERIAL ACCOMMODATED THICKNESS: 0.090 INCHES MINIMUM AND 0.119 INCHES MAXIMUM IN
•
DIAMETER: 0.489 INCHES MINIMUM AND 0.511 INCHES MAXIMUM IN
•
SECURING DEVICE TYPE: SPRING
•
DISTANCE FROM ENGAGING MEMBER TO LARGEST BEARING SURFACE OF HEAD: 0.310 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN
•
TURNLOCK STUD HEAD STYLE: FILLISTER
•
SURFACE TREATMENT: NICKEL EYELET
TECHNICAL CHARACTERISTICS
EYELET OUTSIDE DIAMETER0.519 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN
DRIVE TYPECROSS RECESS
MATERIAL ACCOMMODATED THICKNESS0.090 INCHES MINIMUM AND 0.119 INCHES MAXIMUM IN
DIAMETER0.489 INCHES MINIMUM AND 0.511 INCHES MAXIMUM IN
SECURING DEVICE TYPESPRING
DISTANCE FROM ENGAGING MEMBER TO LARGEST BEARING SURFACE OF HEAD0.310 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN
TURNLOCK STUD HEAD STYLEFILLISTER
SURFACE TREATMENTNICKEL EYELET
SURFACE TREATMENTNICKEL STUD
PART NAME ASSIGNED BY CONTROLLING AGENCYSTUD ASSEMBLY EXTERNALLY SPRING LOADED CROSS RECESS HEAD NICKEL PLATED
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
Ready to buy 28S19-4?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 28S19-4?
28S19-4 is a STUD ASSEMBLY,TURNLOCK FASTENER.
What is the NSN for 28S19-4?
28S19-4 is cataloged in the U.S. Government catalog under NSN 5325-01-568-8955. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 28S19-4

✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.