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20574-4 — 20574-4

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

20574-4: 20574-4.

The 20574-4 is a the manufacturer industrial component. Key specifications include material: STEEL COMP 305, head_length: 0.062 INCHES NOMINAL IN, thread_class: 2A NUT THREAD A, head_diameter: 0.159 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN, thread_length: 0.375 INCHES NOMINAL NUT THREAD IN, overall_length: 0.438 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5307-01-011-3164, 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
20574-4
NSN: 5307-01-011-3164
NIINs: 010113164, 012375075
FSC: 5307 — Studs
CAGE: 56563 — ALIGN AEROSPACE LLC (USA)
SPECIFICATIONS
materialSTEEL COMP 305
head_length0.062 INCHES NOMINAL IN
thread_class2A NUT THREAD A
head_diameter0.159 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN
thread_length0.375 INCHES NOMINAL NUT THREAD IN
overall_length0.438 INCHES NOMINAL IN
locking_featureSELF-CLINCHING HEAD
style_designatorSELF-LOCKING
thread_directionRIGHT-HAND NUT THREAD
surface_treatmentPASSIVATE OVERALL
nominal_thread_size0.112 INCHES NUT THREAD IN
distance_across_flats0.188 INCHES NOMINAL IN
NSN5307-01-011-3164
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 20574-4 · 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
•
THREAD LENGTH: 0.375 INCHES NOMINAL NUT THREAD IN
•
STYLE DESIGNATOR: SELF-LOCKING
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE
•
THREAD DIRECTION: RIGHT-HAND NUT THREAD
•
NOMINAL THREAD SIZE: 0.112 INCHES NUT THREAD IN
•
HEAD LENGTH: 0.062 INCHES NOMINAL IN
•
LOCKING FEATURE: SELF-CLINCHING HEAD
TECHNICAL CHARACTERISTICS
THREAD LENGTH0.375 INCHES NOMINAL NUT THREAD IN
STYLE DESIGNATORSELF-LOCKING
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE
OVERALL LENGTH0.438 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND NUT THREAD
NOMINAL THREAD SIZE0.112 INCHES NUT THREAD IN
HEAD LENGTH0.062 INCHES NOMINAL IN
LOCKING FEATURESELF-CLINCHING HEAD
SURFACE TREATMENTPASSIVATE OVERALL
THREAD CLASS2A NUT THREAD A
SUBSTITUTES & CROSS-REFERENCES 3
950278-4Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
70-846517-4Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
4S-2-12Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 20574-4?
20574-4 is a 20574-4.
What parts can replace 20574-4?
There are 3 known substitutes for 20574-4: 950278-4, 70-846517-4, 4S-2-12. Substitute compatibility should be verified for your specific system.
What is the NSN for 20574-4?
20574-4 is cataloged in the U.S. Government catalog under NSN 5307-01-011-3164. 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.