PartsTable
Technical Data Sheet
Download PDF

40S47-21 — STUD ASSEMBLY,TURNLOCK FASTENER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

40S47-21: STUD ASSEMBLY,TURNLOCK FASTENER.

STUD ASSEMBLY,TURNLOCK FASTENER. Key specifications include material: STEEL OVERALL, head_length: 1.095 INCHES NOMINAL IN, eyelet_length: 0.651 INCHES MINIMUM AND 0.680 INCHES MAXIMUM IN, stud_head_height: 1.050 INCHES NOMINAL IN, surface_treatment: CADMIUM AND CHROMATE OVERALL, stud_assembly_style: STUD ASSEMBLY. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-935-8801, 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
40S47-21
NSN: 5325-00-935-8801
FSC: 5325 — Fastening Devices
CAGE: 71286 — HOWMET GLOBAL FASTENING SYSTEMS INC DIV CAMLOC PRODUCTS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_length1.095 INCHES NOMINAL IN
eyelet_length0.651 INCHES MINIMUM AND 0.680 INCHES MAXIMUM IN
stud_head_height1.050 INCHES NOMINAL IN
surface_treatmentCADMIUM AND CHROMATE OVERALL
stud_assembly_styleSTUD ASSEMBLY
securing_device_typeWASHER
eyelet_outside_diameter0.341 INCHES MINIMUM AND 0.348 INCHES MAXIMUM IN
turnlock_stud_head_styleLOOP ON BELL
material_accommodated_thickness0.651 INCHES MINIMUM AND 0.680 INCHES MAXIMUM IN
distance_from_stud_end_to_largest_bearing_surface_of_eyelet0.341 INCHES MINIMUM AND 0.349 INCHES MAXIMUM IN
distance_from_engaging_member_to_largest_bearing_surface_of_head0.983 INCHES MINIMUM AND 0.993 INCHES MAXIMUM IN
NSN5325-00-935-8801
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 40S47-21 · 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
•
HEAD LENGTH: 1.095 INCHES NOMINAL IN
•
EYELET OUTSIDE DIAMETER: 0.341 INCHES MINIMUM AND 0.348 INCHES MAXIMUM IN
•
MATERIAL ACCOMMODATED THICKNESS: 0.651 INCHES MINIMUM AND 0.680 INCHES MAXIMUM IN
•
STUD HEAD HEIGHT: 1.050 INCHES NOMINAL IN
•
DISTANCE FROM STUD END TO LARGEST BEARING SURFACE OF EYELET: 0.341 INCHES MINIMUM AND 0.349 INCHES MAXIMUM IN
•
SECURING DEVICE TYPE: WASHER
•
DISTANCE FROM ENGAGING MEMBER TO LARGEST BEARING SURFACE OF HEAD: 0.983 INCHES MINIMUM AND 0.993 INCHES MAXIMUM IN
•
TURNLOCK STUD HEAD STYLE: LOOP ON BELL
TECHNICAL CHARACTERISTICS
HEAD LENGTH1.095 INCHES NOMINAL IN
EYELET OUTSIDE DIAMETER0.341 INCHES MINIMUM AND 0.348 INCHES MAXIMUM IN
MATERIAL ACCOMMODATED THICKNESS0.651 INCHES MINIMUM AND 0.680 INCHES MAXIMUM IN
STUD HEAD HEIGHT1.050 INCHES NOMINAL IN
DISTANCE FROM STUD END TO LARGEST BEARING SURFACE OF EYELET0.341 INCHES MINIMUM AND 0.349 INCHES MAXIMUM IN
SECURING DEVICE TYPEWASHER
DISTANCE FROM ENGAGING MEMBER TO LARGEST BEARING SURFACE OF HEAD0.983 INCHES MINIMUM AND 0.993 INCHES MAXIMUM IN
TURNLOCK STUD HEAD STYLELOOP ON BELL
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
MATERIALSTEEL OVERALL
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
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
Ready to buy 40S47-21?
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 40S47-21?
40S47-21 is a STUD ASSEMBLY,TURNLOCK FASTENER.
What is the NSN for 40S47-21?
40S47-21 is cataloged in the U.S. Government catalog under NSN 5325-00-935-8801. 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 — 40S47-21

✓ 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.