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021-31575-000 — STUD,CONTINUOUS THREAD

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

021-31575-000: STUD,CONTINUOUS THREAD.

The STUD,CONTINUOUS THREAD is a the manufacturer industrial component. Key specifications include material: STEEL, thread_class: 2A LOCATION NOT OTHERWISE SPECIFIED A, overall_length: 4.500 INCHES NOMINAL IN, thread_direction: RIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED, nominal_thread_size: 0.750 INCHES LOCATION NOT OTHERWISE SPECIFIED IN, end_item_identification: R-114 WATER COOLING SYSTEMS, SSN-688 CLASS SUBMARINES. This part is cataloged in the U.S.

Government catalog under NSN 5307-01-556-2387, 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
021-31575-000
NSN: 5307-01-556-2387
FSC: 5307 — Studs
CAGE: 66935 — JOHNSON CONTROLS NAVY SYSTEMS, LLC (USA)
SPECIFICATIONS
materialSTEEL
thread_class2A LOCATION NOT OTHERWISE SPECIFIED A
overall_length4.500 INCHES NOMINAL IN
thread_directionRIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED
nominal_thread_size0.750 INCHES LOCATION NOT OTHERWISE SPECIFIED IN
end_item_identificationR-114 WATER COOLING SYSTEMS, SSN-688 CLASS SUBMARINES
thread_quantity_per_inch10 LOCATION NOT OTHERWISE SPECIFIED
thread_series_designatorUNIFIED NATIONAL COARSE (UNC) LOCATION NOT OTHERWISE SPECIFIED
material_document_and_classificationSAE J-429. GRADE 5 ASSN STD SINGLE MATERIAL RESPONSE
NSN5307-01-556-2387
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 021-31575-000 · 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 J-429. GRADE 5 ASSN STD SINGLE MATERIAL RESPONSE
•
THREAD DIRECTION: RIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED
•
NOMINAL THREAD SIZE: 0.750 INCHES LOCATION NOT OTHERWISE SPECIFIED IN
•
THREAD CLASS: 2A LOCATION NOT OTHERWISE SPECIFIED A
•
THREAD QUANTITY PER INCH: 10 LOCATION NOT OTHERWISE SPECIFIED
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
MATERIAL DOCUMENT AND CLASSIFICATIONSAE J-429. GRADE 5 ASSN STD SINGLE MATERIAL RESPONSE
OVERALL LENGTH4.500 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED
NOMINAL THREAD SIZE0.750 INCHES LOCATION NOT OTHERWISE SPECIFIED IN
THREAD CLASS2A LOCATION NOT OTHERWISE SPECIFIED A
END ITEM IDENTIFICATIONR-114 WATER COOLING SYSTEMS, SSN-688 CLASS SUBMARINES
THREAD QUANTITY PER INCH10 LOCATION NOT OTHERWISE SPECIFIED
MATERIALSTEEL
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC) LOCATION NOT OTHERWISE SPECIFIED
SUBSTITUTES & CROSS-REFERENCES 2
477-15979-000 ITEM 66Reference document
Same NSN cross-reference
Reference document — Secondary reference
477-15979-000Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 021-31575-000?
021-31575-000 is a STUD,CONTINUOUS THREAD.
What parts can replace 021-31575-000?
There are 2 known substitutes for 021-31575-000: 477-15979-000 ITEM 66, 477-15979-000. Substitute compatibility should be verified for your specific system.
What is the NSN for 021-31575-000?
021-31575-000 is cataloged in the U.S. Government catalog under NSN 5307-01-556-2387. 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.