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Technical Data Sheet
PartsTable / COMPONENT / MIL-F-22978
MIL-F-22978 ✓ 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 FASTENER ASSEMBLY,TURNLOCK is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, grip_length: 0.465 INCHES NOMINAL IN, head_length: 0.719 INCHES NOMINAL IN, stud_head_height: 0.662 INCHES NOMINAL IN, shank_neck_length: 0.347 INCHES NOMINAL IN, surface_treatment: ZINC AND CHROMATE OVERALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-133-2094, 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
MIL-F-22978
NSN: 5325-00-133-2094
FSC: 5325
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL OVERALL
grip_length0.465 INCHES NOMINAL IN
head_length0.719 INCHES NOMINAL IN
stud_head_height0.662 INCHES NOMINAL IN
shank_neck_length0.347 INCHES NOMINAL IN
surface_treatmentZINC AND CHROMATE OVERALL
securing_device_typeRING
turnlock_stud_head_styleLOOP ON FLAT FILLISTER
stud_shank_major_diameter0.240 INCHES NOMINAL IN
turnlock_stud_shank_styleSTUD SHANK
material_accommodated_thickness0.310 INCHES MINIMUM AND 0.329 INCHES MAXIMUM IN
NSN5325-00-133-2094
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MIL-F-22978 · 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
•
RECEPTACLE OVERALL LENGTH: 1.135 INCHES MAXIMUM IN
•
STUD SHANK MAJOR DIAMETER: 0.373 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 1008 OR STEEL COMP 1010 OR STEEL COMP 1012 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OR STEEL COMP 1021 OR STEEL COMP 1022 OR STEEL COMP 1025 OR STEEL COMP 1030 OR STEEL COMP 1035 OR STEEL COMP 1040 OR STEEL COMP 1045 OR STEEL COMP 1050 OR STEEL COMP 1055 OR STEEL COMP 1060 OR STEEL COMP 1095 OVERALL
•
DRIVE TYPE: CROSS RECESS
•
DIAMETER: 0.525 INCHES NOMINAL IN
•
MOUNTING STYLE: PLAIN W/MOUNTING HOLE
•
TURNLOCK STUD HEAD STYLE: FLAT COUNTERSUNK
•
MATERIAL ACCOMMODATED THICKNESS: 0.431 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
RECEPTACLE OVERALL LENGTH1.135 INCHES MAXIMUM IN
STUD SHANK MAJOR DIAMETER0.373 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
MATERIALSTEEL COMP 1008 OR STEEL COMP 1010 OR STEEL COMP 1012 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OR STEEL COMP 1021 OR STEEL COMP 1022 OR STEEL COMP 1025 OR STEEL COMP 1030 OR STEEL COMP 1035 OR STEEL COMP 1040 OR STEEL COMP 1045 OR STEEL COMP 1050 OR STEEL COMP 1055 OR STEEL COMP 1060 OR STEEL COMP 1095 OVERALL
DRIVE TYPECROSS RECESS
DIAMETER0.525 INCHES NOMINAL IN
MOUNTING STYLEPLAIN W/MOUNTING HOLE
TURNLOCK STUD HEAD STYLEFLAT COUNTERSUNK
MATERIAL ACCOMMODATED THICKNESS0.431 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
RECEPTACLE WIDTH0.625 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 28
8-02-00-3Interchangeable
interchangeable cross-reference
interchangeable
MIL-F-22978Interchangeable
interchangeable cross-reference
interchangeable
FX10-1556-3PInterchangeable
interchangeable cross-reference
interchangeable
8-02-00-1Interchangeable
interchangeable cross-reference
interchangeable
8-02-00-5Interchangeable
interchangeable cross-reference
interchangeable
80C06-5-1AAInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MIL-F-22978?
MIL-F-22978 is a FASTENER ASSEMBLY,TURNLOCK.
What parts can replace MIL-F-22978?
There are 28 known substitutes for MIL-F-22978: 8-02-00-3, MIL-F-22978, FX10-1556-3P and 25 more. Substitute compatibility should be verified for your specific system.
Is MIL-F-22978 still available?
MIL-F-22978 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