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5997-559-178 — INSERT,SCREW THREAD

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

5997-559-178: INSERT,SCREW THREAD.

The INSERT,SCREW THREAD is a the manufacturer industrial component. Key specifications include length: 0.870 INCHES NOMINAL IN, material: STEEL OVERALL, insert_size: 0.4375 IN OD IN, mounting_method: THREADED HOLE(S), style_designator: FLANGE, nominal_thread_size: 0.4375 INCHES IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-443-3504, 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
5997-559-178
NSN: 5325-01-443-3504
FSC: 5325 — Fastening Devices
CAGE: U7375 — WURTH UK LTD (GBR)
SPECIFICATIONS
length0.870 INCHES NOMINAL IN
materialSTEEL OVERALL
insert_size0.4375 IN OD IN
mounting_methodTHREADED HOLE(S)
style_designatorFLANGE
nominal_thread_size0.4375 INCHES IN
thread_quantity_per_inch20
thread_series_designatorUNF
NSN5325-01-443-3504
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 5997-559-178 · 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
•
LENGTH: 0.870 INCHES NOMINAL IN
•
MOUNTING METHOD: THREADED HOLE(S)
•
INSERT SIZE: 0.4375 IN OD IN
•
STYLE DESIGNATOR: FLANGE
•
NOMINAL THREAD SIZE: 0.4375 INCHES IN
•
THREAD QUANTITY PER INCH: 20
•
MATERIAL: STEEL OVERALL
•
THREAD SERIES DESIGNATOR: UNF
TECHNICAL CHARACTERISTICS
LENGTH0.870 INCHES NOMINAL IN
MOUNTING METHODTHREADED HOLE(S)
INSERT SIZE0.4375 IN OD IN
STYLE DESIGNATORFLANGE
NOMINAL THREAD SIZE0.4375 INCHES IN
THREAD QUANTITY PER INCH20
MATERIALSTEEL OVERALL
THREAD SERIES DESIGNATORUNF
SUBSTITUTES & CROSS-REFERENCES 1
0662-971-870Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 5997-559-178?
5997-559-178 is a INSERT,SCREW THREAD.
What parts can replace 5997-559-178?
There is 1 known substitute for 5997-559-178: 0662-971-870. Substitute compatibility should be verified for your specific system.
What is the NSN for 5997-559-178?
5997-559-178 is cataloged in the U.S. Government catalog under NSN 5325-01-443-3504. 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.