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40S5-16 — STUD ASSEMBLY,TURNLOCK FASTENER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

40S5-16: STUD ASSEMBLY,TURNLOCK FASTENER.

STUD ASSEMBLY,TURNLOCK FASTENER. Key specifications include diameter: 0.377 INCHES MINIMUM AND 0.384 INCHES MAXIMUM IN, material: STEEL OVERALL, drive_type: CROSS RECESS, eyelet_length: 0.237 INCHES MINIMUM AND 0.267 INCHES MAXIMUM IN, special_features: JOINT STARS AIRCRAFT, stud_head_height: 0.092 INCHES MINIMUM AND 0.112 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-078-7560, 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
40S5-16
NSN: 5325-00-078-7560
NIINs: 000787560, 015016711
FSC: 5325 — Fastening Devices
CAGE: 71286 — HOWMET GLOBAL FASTENING SYSTEMS INC DIV CAMLOC PRODUCTS (USA)
SPECIFICATIONS
diameter0.377 INCHES MINIMUM AND 0.384 INCHES MAXIMUM IN
materialSTEEL OVERALL
drive_typeCROSS RECESS
eyelet_length0.237 INCHES MINIMUM AND 0.267 INCHES MAXIMUM IN
special_featuresJOINT STARS AIRCRAFT
stud_head_height0.092 INCHES MINIMUM AND 0.112 INCHES MAXIMUM IN
surface_treatmentCADMIUM OVERALL
stud_assembly_styleSTUD ASSEMBLY
eyelet_outside_diameter0.412 INCHES MINIMUM AND 0.427 INCHES MAXIMUM IN
turnlock_stud_head_styleSTUD HEAD
part_name_assigned_by_controlling_agencySTUD ASSEMBLY, PANEL FASTENER 1/4TURN
surface_treatment_document_and_classificationQQ-P-416, TYPE II, CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5325-00-078-7560
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 40S5-16 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
EYELET OUTSIDE DIAMETER: 0.341 INCHES MINIMUM AND 0.348 INCHES MAXIMUM IN
•
DRIVE TYPE: SLOTTED
•
MATERIAL ACCOMMODATED THICKNESS: 0.501 INCHES MINIMUM AND 0.530 INCHES MAXIMUM IN
•
DIAMETER: 0.380 INCHES NOMINAL IN
•
DISTANCE FROM ENGAGING MEMBER TO LARGEST BEARING SURFACE OF HEAD: 0.843 INCHES MINIMUM AND 0.873 INCHES MAXIMUM IN
•
TURNLOCK STUD HEAD STYLE: FLAT COUNTERSUNK
•
MATERIAL: STEEL COMP 305 EYELET
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
EYELET OUTSIDE DIAMETER0.341 INCHES MINIMUM AND 0.348 INCHES MAXIMUM IN
DRIVE TYPESLOTTED
MATERIAL ACCOMMODATED THICKNESS0.501 INCHES MINIMUM AND 0.530 INCHES MAXIMUM IN
DIAMETER0.380 INCHES NOMINAL IN
DISTANCE FROM ENGAGING MEMBER TO LARGEST BEARING SURFACE OF HEAD0.843 INCHES MINIMUM AND 0.873 INCHES MAXIMUM IN
TURNLOCK STUD HEAD STYLEFLAT COUNTERSUNK
MATERIALSTEEL COMP 305 EYELET
MATERIALSTEEL COMP 302 STUD
MATERIALSTEEL COMP 302 PIN
SUBSTITUTES & CROSS-REFERENCES 4
10605792-1Reference document
Same NSN cross-reference
Reference document — Secondary reference
5325PL1727861Reference document
Same NSN cross-reference
Reference document — Informative reference only
BACS21X16CReference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
4002-16SSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 40S5-16?
40S5-16 is a STUD ASSEMBLY,TURNLOCK FASTENER.
What parts can replace 40S5-16?
There are 4 known substitutes for 40S5-16: 10605792-1, 5325PL1727861, BACS21X16C and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 40S5-16?
40S5-16 is cataloged in the U.S. Government catalog under NSN 5325-00-078-7560. This indicates validated use in U.S. government and defense supply chains.
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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.