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40S37-4A — STUD ASSEMBLY,TURNLOCK FASTENER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

40S37-4A: STUD ASSEMBLY,TURNLOCK FASTENER.

STUD ASSEMBLY,TURNLOCK FASTENER. Key specifications include diameter: 0.377 INCHES MINIMUM AND 0.384 INCHES MAXIMUM IN, eyelet_outside_diameter: 0.341 INCHES MINIMUM AND 0.348 INCHES MAXIMUM IN, material_accommodated_thickness: 0.141 INCHES MINIMUM AND 0.170 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-422-8922, 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
40S37-4A
NSN: 5325-01-422-8922
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
eyelet_outside_diameter0.341 INCHES MINIMUM AND 0.348 INCHES MAXIMUM IN
material_accommodated_thickness0.141 INCHES MINIMUM AND 0.170 INCHES MAXIMUM IN
NSN5325-01-422-8922
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 40S37-4A · 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: 0.341 INCHES MINIMUM AND 0.348 INCHES MAXIMUM IN
•
MATERIAL ACCOMMODATED THICKNESS: 0.141 INCHES MINIMUM AND 0.170 INCHES MAXIMUM IN
•
DIAMETER: 0.377 INCHES MINIMUM AND 0.384 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
EYELET OUTSIDE DIAMETER0.341 INCHES MINIMUM AND 0.348 INCHES MAXIMUM IN
MATERIAL ACCOMMODATED THICKNESS0.141 INCHES MINIMUM AND 0.170 INCHES MAXIMUM IN
DIAMETER0.377 INCHES MINIMUM AND 0.384 INCHES MAXIMUM IN
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
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FREQUENTLY ASKED QUESTIONS
What is 40S37-4A?
40S37-4A is a STUD ASSEMBLY,TURNLOCK FASTENER.
What is the NSN for 40S37-4A?
40S37-4A is cataloged in the U.S. Government catalog under NSN 5325-01-422-8922. 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.