PartsTable
Technical Data Sheet
Download PDF

MILF5591 — STUD,TURNLOCK FASTENER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

MILF5591: STUD,TURNLOCK FASTENER.

The STUD,TURNLOCK FASTENER is a the manufacturer industrial component. Key specifications include diameter: 0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN, material: STEEL OVERALL, drive_type: SLOTTED, grip_length: 0.560 INCHES NOMINAL IN, shank_neck_length: 0.410 INCHES NOMINAL IN, surface_treatment: CADMIUM OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-057-6367, 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
MILF5591
NSN: 5325-00-057-6367
NIINs: 000576367, 000635863, 001715793, 001951438, 002816204, 002819116, 002821880, 002821889, 002821894, 002821897, 002821902, 002821904, 002821905, 002821908, 002821910, 002821912, 002821916, 002821917, 002853280, 002862587, 002863770, 002865580, 002903803, 002903804, 002903805, 002903974, 002903989, 002903994, 002903998, 002903999, 002904923, 002906605, 002906607, 002906613, 002910387, 002919359, 002971092, 002979637, 002979649, 002979662, 002984192, 002987027, 003009705, 003376575, 003378708, 004329834, 004329854, 004329855, 004329887, 004329899, 004329902, 004329917, 004329987, 004378962, 004492963, 004635844, 004891139, 005618106, 005846344, 006191364, 006191366, 006197044, 006849535, 009880635, 010071714, 010480127, 011752185, 012274907, 012843417, 013475109
FSC: 5325 — Fastening Devices
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
diameter0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
materialSTEEL OVERALL
drive_typeSLOTTED
grip_length0.560 INCHES NOMINAL IN
shank_neck_length0.410 INCHES NOMINAL IN
surface_treatmentCADMIUM OVERALL
turnlock_stud_head_styleFLAT COUNTERSUNK
stud_shank_major_diameter0.212 INCHES MINIMUM AND 0.217 INCHES MAXIMUM IN
turnlock_stud_shank_styleSTUD SHANK
material_accommodated_thickness0.301 INCHES MINIMUM AND 0.330 INCHES MAXIMUM IN
surface_treatment_document_and_classificationQQ-P-416,TY 1,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5325-00-057-6367
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MILF5591 · 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,TY 1 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
DRIVE TYPE: SLOTTED
•
MATERIAL ACCOMMODATED THICKNESS: 0.051 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN
•
TURNLOCK STUD SHANK STYLE: STUD SHANK
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE 2317 ASSN STD 1ST MATERIAL RESPONSE OR AISI FED SPEC 2ND MATERIAL RESPONSE OVERALL
•
DIAMETER: 0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
•
SHANK NECK LENGTH: 0.170 INCHES NOMINAL IN
•
NONDEFINITIVE SPEC/STD DATA: 1 TYPE AND A CLASS AND B CLASS AND 1 STYLE AND 2 SIZE
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 1 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
DRIVE TYPESLOTTED
MATERIAL ACCOMMODATED THICKNESS0.051 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN
TURNLOCK STUD SHANK STYLESTUD SHANK
MATERIAL DOCUMENT AND CLASSIFICATIONSAE 2317 ASSN STD 1ST MATERIAL RESPONSE OR AISI FED SPEC 2ND MATERIAL RESPONSE OVERALL
DIAMETER0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
SHANK NECK LENGTH0.170 INCHES NOMINAL IN
NONDEFINITIVE SPEC/STD DATA1 TYPE AND A CLASS AND B CLASS AND 1 STYLE AND 2 SIZE
TURNLOCK STUD HEAD STYLEFLAT COUNTERSUNK
STUD SHANK MAJOR DIAMETER0.212 INCHES MINIMUM AND 0.217 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 3
F31-2T6Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
F3.5T6Reference document
Same NSN cross-reference
Reference document — Secondary reference
50-007F6Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
Ready to buy MILF5591?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is MILF5591?
MILF5591 is a STUD,TURNLOCK FASTENER.
What parts can replace MILF5591?
There are 3 known substitutes for MILF5591: F31-2T6, F3.5T6, 50-007F6. Substitute compatibility should be verified for your specific system.
What is the NSN for MILF5591?
MILF5591 is cataloged in the U.S. Government catalog under NSN 5325-00-057-6367. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — MILF5591

✓ 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.