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Technical Data Sheet
PartsTable / COMPONENT / F31-2T11
F31-2T11 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

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 OR STEEL COMP 8620 OVERALL, drive_type: SLOTTED, grip_length: 0.340 INCHES NOMINAL IN, shank_neck_length: 0.210 INCHES NOMINAL IN, surface_treatment: CADMIUM OVERALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-286-2587, 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
F31-2T11
NSN: 5325-00-286-2587
FSC: 5325
CAGE: 72794 — SOUTHCO INC (USA)
SPECIFICATIONS
diameter0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
materialSTEEL OR STEEL COMP 8620 OVERALL
drive_typeSLOTTED
grip_length0.340 INCHES NOMINAL IN
shank_neck_length0.210 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
nondefinitive_spec/std_data1 TYPE AND A CLASS AND B CLASS AND 1 STYLE AND 2 SIZE
material_accommodated_thickness0.101 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN
material_document_and_classificationSAE 2317 ASSN STD 1ST MATERIAL RESPONSE OR AISI FED SPEC 2ND MATERIAL RESPONSE OVERALL
NSN5325-00-286-2587
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: F31-2T11 · 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
•
MATERIAL ACCOMMODATED THICKNESS: 0.101 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN
•
NONDEFINITIVE SPEC/STD DATA: 1 TYPE AND A CLASS AND B CLASS AND 1 STYLE AND 2 SIZE
•
DIAMETER: 0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
•
STUD SHANK MAJOR DIAMETER: 0.212 INCHES MINIMUM AND 0.217 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE 2317 ASSN STD 1ST MATERIAL RESPONSE OR AISI FED SPEC 2ND MATERIAL RESPONSE OVERALL
•
SHANK NECK LENGTH: 0.210 INCHES NOMINAL IN
•
DRIVE TYPE: SLOTTED
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 1 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL ACCOMMODATED THICKNESS0.101 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN
NONDEFINITIVE SPEC/STD DATA1 TYPE AND A CLASS AND B CLASS AND 1 STYLE AND 2 SIZE
DIAMETER0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
STUD SHANK MAJOR DIAMETER0.212 INCHES MINIMUM AND 0.217 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONSAE 2317 ASSN STD 1ST MATERIAL RESPONSE OR AISI FED SPEC 2ND MATERIAL RESPONSE OVERALL
SHANK NECK LENGTH0.210 INCHES NOMINAL IN
DRIVE TYPESLOTTED
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 1 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
TURNLOCK STUD HEAD STYLEFLAT COUNTERSUNK
TURNLOCK STUD SHANK STYLESTUD SHANK
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
F3 1/2T12Interchangeable
interchangeable cross-reference
interchangeable
F31-2T12Interchangeable
interchangeable cross-reference
interchangeable
MIL-F-5591Interchangeable
interchangeable cross-reference
interchangeable
F35T11Interchangeable
Same NIIN cross-reference
interchangeable
2356-20-12-C3CInterchangeable
Same NIIN cross-reference
interchangeable
F35T12Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is F31-2T11?
F31-2T11 is a STUD,TURNLOCK FASTENER.
What parts can replace F31-2T11?
There are 8 known substitutes for F31-2T11: F3 1/2T12, F31-2T12, MIL-F-5591 and 5 more. Substitute compatibility should be verified for your specific system.
Is F31-2T11 still available?
F31-2T11 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026