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40S37-17A — STUD ASSEMBLY,TURNLOCK FASTENER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

40S37-17A: STUD ASSEMBLY,TURNLOCK FASTENER.

STUD ASSEMBLY,TURNLOCK FASTENER. Key specifications include diameter: 0.377 INCHES MINIMUM AND 0.384 INCHES MAXIMUM IN, material: STEEL STUD, drive_type: CROSS RECESS, eyelet_length: 0.652 INCHES NOMINAL IN, special_features: BLACK CUP, surface_treatment: CADMIUM AND CHROMATE PIN. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-125-6316, 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
40S37-17A
NSN: 5325-01-125-6316
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 STUD
drive_typeCROSS RECESS
eyelet_length0.652 INCHES NOMINAL IN
special_featuresBLACK CUP
surface_treatmentCADMIUM AND CHROMATE PIN
stud_assembly_styleSTUD ASSEMBLY
eyelet_outside_diameter0.341 INCHES MINIMUM AND 0.348 INCHES MAXIMUM IN
turnlock_stud_head_styleFLAT COUNTERSUNK
material_accommodated_thickness0.531 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN
material_document_and_classificationASTM A304 COMP 4037H ASSN STD SINGLE MATERIAL RESPONSE STUD
surface_treatment_document_and_classificationQQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE EJECTOR SPRING
NSN5325-01-125-6316
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 40S37-17A · 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-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE STUD
•
EYELET OUTSIDE DIAMETER: 0.341 INCHES MINIMUM AND 0.348 INCHES MAXIMUM IN
•
DRIVE TYPE: CROSS RECESS
•
MATERIAL ACCOMMODATED THICKNESS: 0.531 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-W-470 FED SPEC SINGLE MATERIAL RESPONSE PIN
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE STUD
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE EJECTOR SPRING
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE PIN
EYELET OUTSIDE DIAMETER0.341 INCHES MINIMUM AND 0.348 INCHES MAXIMUM IN
DRIVE TYPECROSS RECESS
MATERIAL ACCOMMODATED THICKNESS0.531 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-W-470 FED SPEC SINGLE MATERIAL RESPONSE PIN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-W-470 FED SPEC SINGLE MATERIAL RESPONSE EJECTOR SPRING
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A109 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A611 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A635 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A108 COMP 1212 OR COMP 1213 ASSN STD SINGLE MATERIAL RESPONSE EYELET
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A304 COMP 4037H ASSN STD SINGLE MATERIAL RESPONSE STUD
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 1
40S37-17Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
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 40S37-17A?
40S37-17A is a STUD ASSEMBLY,TURNLOCK FASTENER.
What parts can replace 40S37-17A?
There is 1 known substitute for 40S37-17A: 40S37-17. Substitute compatibility should be verified for your specific system.
What is the NSN for 40S37-17A?
40S37-17A is cataloged in the U.S. Government catalog under NSN 5325-01-125-6316. This indicates validated use in U.S. government and defense supply chains.
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✓ 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.