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4137-0168 — STUD ASSEMBLY,TURNLOCK FASTENER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

4137-0168: STUD ASSEMBLY,TURNLOCK FASTENER.

STUD ASSEMBLY,TURNLOCK FASTENER. Key specifications include diameter: 0.281 INCHES NOMINAL IN, material: STEEL COMP 4037 STUD, drive_type: SLOTTED, eyelet_length: 0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN, stud_diameter: 0.212 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN, special_features: BLACK EPOXY PAINT OVER CADMIUM. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-379-9542, 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
4137-0168
NSN: 5325-01-379-9542
FSC: 5325 — Fastening Devices
CAGE: 19397 — BAE SYSTEMS INFORMATION & ELECTRONIC SYSTEMS INTEGRATION INC. (USA)
SPECIFICATIONS
diameter0.281 INCHES NOMINAL IN
materialSTEEL COMP 4037 STUD
drive_typeSLOTTED
eyelet_length0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
stud_diameter0.212 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN
special_featuresBLACK EPOXY PAINT OVER CADMIUM
surface_treatmentCADMIUM AND CHROMATE OVERALL
stud_assembly_styleSTUD ASSEMBLY
eyelet_outside_diameter0.373 INCHES MINIMUM AND 0.383 INCHES MAXIMUM IN
turnlock_stud_head_styleFILLISTER
material_accommodated_thickness0.120 INCHES MINIMUM AND 0.129 INCHES MAXIMUM IN
surface_treatment_document_and_classificationQQ-P-416, TY2, CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5325-01-379-9542
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 4137-0168 · 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, TY2, CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
EYELET OUTSIDE DIAMETER: 0.373 INCHES MINIMUM AND 0.383 INCHES MAXIMUM IN
•
DRIVE TYPE: SLOTTED
•
MATERIAL ACCOMMODATED THICKNESS: 0.120 INCHES MINIMUM AND 0.129 INCHES MAXIMUM IN
•
DIAMETER: 0.281 INCHES NOMINAL IN
•
DISTANCE FROM ENGAGING MEMBER TO LARGEST BEARING SURFACE OF HEAD: 0.435 INCHES MINIMUM AND 0.445 INCHES MAXIMUM IN
•
TURNLOCK STUD HEAD STYLE: FILLISTER
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416, TY2, CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
EYELET OUTSIDE DIAMETER0.373 INCHES MINIMUM AND 0.383 INCHES MAXIMUM IN
DRIVE TYPESLOTTED
MATERIAL ACCOMMODATED THICKNESS0.120 INCHES MINIMUM AND 0.129 INCHES MAXIMUM IN
DIAMETER0.281 INCHES NOMINAL IN
DISTANCE FROM ENGAGING MEMBER TO LARGEST BEARING SURFACE OF HEAD0.435 INCHES MINIMUM AND 0.445 INCHES MAXIMUM IN
TURNLOCK STUD HEAD STYLEFILLISTER
SPECIAL FEATURESBLACK EPOXY PAINT OVER CADMIUM
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
MATERIALSTEEL COMP 4037 STUD
SUBSTITUTES & CROSS-REFERENCES 2
PFSC35-44AEPBReference document
Same NSN cross-reference
Reference document — Secondary reference
PFSC35-44A-SEBSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4137-0168?
4137-0168 is a STUD ASSEMBLY,TURNLOCK FASTENER.
What parts can replace 4137-0168?
There are 2 known substitutes for 4137-0168: PFSC35-44AEPB, PFSC35-44A-SEB. Substitute compatibility should be verified for your specific system.
What is the NSN for 4137-0168?
4137-0168 is cataloged in the U.S. Government catalog under NSN 5325-01-379-9542. 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.