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Technical Data Sheet
PartsTable / COMPONENT / F31-2T12
F31-2T12 ✓ 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: 0.350 INCHES NOMINAL IN, shank_neck_length: 0.210 INCHES NOMINAL IN, surface_treatment: CADMIUM OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-195-1438, 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
F31-2T12
NSN: 5325-00-195-1438
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_length0.350 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_thickness0.111 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
material_document_and_classificationSAE 2317 ASSN STD 1ST MATERIAL RESPONSE OR AISI FED SPEC 2ND MATERIAL RESPONSE OVERALL
NSN5325-00-195-1438
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: F31-2T12 · 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 DOCUMENT AND CLASSIFICATION: SAE 2317 ASSN STD 1ST MATERIAL RESPONSE OR AISI FED SPEC 2ND MATERIAL RESPONSE OVERALL
•
MATERIAL ACCOMMODATED THICKNESS: 0.111 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
•
MATERIAL: STEEL OR STEEL COMP 8620 OVERALL
•
SURFACE TREATMENT: CADMIUM OVERALL
•
NONDEFINITIVE SPEC/STD DATA: 1 TYPE AND A CLASS AND B CLASS AND 1 STYLE AND 2 SIZE
•
GRIP LENGTH: 0.350 INCHES NOMINAL IN
•
TURNLOCK STUD HEAD STYLE: FLAT COUNTERSUNK
•
DIAMETER: 0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL DOCUMENT AND CLASSIFICATIONSAE 2317 ASSN STD 1ST MATERIAL RESPONSE OR AISI FED SPEC 2ND MATERIAL RESPONSE OVERALL
MATERIAL ACCOMMODATED THICKNESS0.111 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
MATERIALSTEEL OR STEEL COMP 8620 OVERALL
SURFACE TREATMENTCADMIUM OVERALL
NONDEFINITIVE SPEC/STD DATA1 TYPE AND A CLASS AND B CLASS AND 1 STYLE AND 2 SIZE
GRIP LENGTH0.350 INCHES NOMINAL IN
TURNLOCK STUD HEAD STYLEFLAT COUNTERSUNK
DIAMETER0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
DRIVE TYPESLOTTED
STUD SHANK MAJOR DIAMETER0.212 INCHES MINIMUM AND 0.217 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
F31-2T11Interchangeable
interchangeable cross-reference
interchangeable
50-007F11Interchangeable
interchangeable cross-reference
interchangeable
MIL-F-5591Interchangeable
interchangeable cross-reference
interchangeable
98292-2-220Interchangeable
interchangeable cross-reference
interchangeable
3797Interchangeable
interchangeable cross-reference
interchangeable
MMY99835-2-200Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is F31-2T12?
F31-2T12 is a STUD,TURNLOCK FASTENER.
What parts can replace F31-2T12?
There are 10 known substitutes for F31-2T12: F31-2T11, 50-007F11, MIL-F-5591 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for F31-2T12?
F31-2T12 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-195-1438. This indicates validated use in U.S. government and defense supply chains.
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PartsTable Design LLC · partstable.com
Last verified: July 2026