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MIL-F-22978 — FASTENER ASSEMBLY,TURNLOCK

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

MIL-F-22978: FASTENER ASSEMBLY,TURNLOCK.

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 U.S.

Government catalog 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
NIINs: 001332094, 001973359, 002780734, 002842146, 004065478, 004783317, 004783318, 008325772, 008325773, 010078529, 010323664, 010323665, 010690623, 011652549
FSC: 5325 — Fastening Devices
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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TYPE 2 CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
DRIVE TYPE: CROSS RECESS
•
MATERIAL ACCOMMODATED THICKNESS: 0.431 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
•
TURNLOCK STUD SHANK STYLE: STUD SHANK
•
CENTER TO CENTER DISTANCE BETWEEN MOUNTING HOLES: 0.873 INCHES MINIMUM AND 0.877 INCHES MAXIMUM IN
•
MOUNTING STYLE: PLAIN W/MOUNTING HOLE
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD ALL MATERIAL RESPONSES OVERALL
TECHNICAL CHARACTERISTICS
RECEPTACLE OVERALL LENGTH1.135 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TYPE 2 CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
DRIVE TYPECROSS RECESS
MATERIAL ACCOMMODATED THICKNESS0.431 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
TURNLOCK STUD SHANK STYLESTUD SHANK
CENTER TO CENTER DISTANCE BETWEEN MOUNTING HOLES0.873 INCHES MINIMUM AND 0.877 INCHES MAXIMUM IN
MOUNTING STYLEPLAIN W/MOUNTING HOLE
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
DIAMETER0.525 INCHES NOMINAL IN
TURNLOCK RECEPTACLE STYLERECEPTACLE
SUBSTITUTES & CROSS-REFERENCES 4
80S01-5-1AASame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
MS17731-5Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
2919857-5Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
FX10-1555-5Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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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 4 known substitutes for MIL-F-22978: 80S01-5-1AA, MS17731-5, 2919857-5 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MIL-F-22978?
MIL-F-22978 is cataloged in the U.S. Government catalog under NSN 5325-00-133-2094. 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.