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M191018-4-4PL — STUD,TURNLOCK FASTENER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

M191018-4-4PL: STUD,TURNLOCK FASTENER.

The STUD,TURNLOCK FASTENER is a the manufacturer industrial component. Key specifications include diameter: 0.325 INCHES NOMINAL IN, material: STEEL CORROSION RESISTING OVERALL, drive_type: SOCKET, grip_length: 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN, extension_length: 0.361 INCHES NOMINAL IN, stud_head_height: 0.045 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-329-7117, 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
M191018-4-4PL
NSN: 5325-01-329-7117
FSC: 5325 — Fastening Devices
CAGE: 16258 — SPACE-LOK, INC. DBA SPACE-LOK INC DIV SPACE-LOK (USA)
SPECIFICATIONS
diameter0.325 INCHES NOMINAL IN
materialSTEEL CORROSION RESISTING OVERALL
drive_typeSOCKET
grip_length0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
extension_length0.361 INCHES NOMINAL IN
stud_head_height0.045 INCHES NOMINAL IN
surface_treatmentPASSIVATE AND CADMIUM AND CHROMATE OVERALL
securing_device_typeRING
turnlock_stud_head_styleFLAT FILLISTER
stud_shank_major_diameter0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN
turnlock_stud_shank_styleSTUD SHANK
stud_thread_size_and_series/type_designator0.164-32 UNJC
NSN5325-01-329-7117
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: M191018-4-4PL · 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 1ST TREATMENT RESPONSE AND QQ-P-416,TY 2 FED SPEC 2ND TREATMENT RESPONSE OVERALL
•
DRIVE TYPE: SOCKET
•
TURNLOCK STUD SHANK STYLE: STUD SHANK
•
EXTENSION LENGTH: 0.361 INCHES NOMINAL IN
•
DIAMETER: 0.325 INCHES NOMINAL IN
•
STUD HEAD HEIGHT: 0.045 INCHES NOMINAL IN
•
SECURING DEVICE TYPE: RING
•
TURNLOCK STUD HEAD STYLE: FLAT FILLISTER
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC 1ST TREATMENT RESPONSE AND QQ-P-416,TY 2 FED SPEC 2ND TREATMENT RESPONSE OVERALL
DRIVE TYPESOCKET
TURNLOCK STUD SHANK STYLESTUD SHANK
EXTENSION LENGTH0.361 INCHES NOMINAL IN
DIAMETER0.325 INCHES NOMINAL IN
STUD HEAD HEIGHT0.045 INCHES NOMINAL IN
SECURING DEVICE TYPERING
TURNLOCK STUD HEAD STYLEFLAT FILLISTER
STUD SHANK MAJOR DIAMETER0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN
SURFACE TREATMENTPASSIVATE AND CADMIUM AND CHROMATE 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 5
03A119-4-4PLReference document
Same NSN cross-reference
Reference document — Secondary reference
191018-4-4PLReference document
Same NSN cross-reference
Reference document — Secondary reference
03A398-4-4PLReference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
M192018-4-4PLReference document
Same NSN cross-reference
Reference document — Secondary reference
191012-4-4PLReference document
Same NSN cross-reference
Reference document — Secondary reference
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 M191018-4-4PL?
M191018-4-4PL is a STUD,TURNLOCK FASTENER.
What parts can replace M191018-4-4PL?
There are 5 known substitutes for M191018-4-4PL: 03A119-4-4PL, 191018-4-4PL, 03A398-4-4PL and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M191018-4-4PL?
M191018-4-4PL is cataloged in the U.S. Government catalog under NSN 5325-01-329-7117. 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.