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221SS5639 — STUD,FASTENER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

221SS5639: STUD,FASTENER.

The STUD,FASTENER is a the manufacturer industrial component. Key specifications include general_characteristics_item_description: PLASTIC /NYLON/,COLOR BLACK,0.375 IN. DIA HEAD,0.300 IN.

H HEAD,0.750 IN. LG O/A IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-960-5224, 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
221SS5639
NSN: 5325-00-960-5224
FSC: 5325 — Fastening Devices
CAGE: K1017 — BAE SYSTEMS (OPERATIONS) LTD (GBR)
SPECIFICATIONS
general_characteristics_item_descriptionPLASTIC /NYLON/,COLOR BLACK,0.375 IN. DIA HEAD,0.300 IN. H HEAD,0.750 IN. LG O/A IN
NSN5325-00-960-5224
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 221SS5639 · 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
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: PLASTIC /NYLON/,COLOR BLACK,0.375 IN. DIA HEAD,0.300 IN. H HEAD,0.750 IN. LG O/A IN
TECHNICAL CHARACTERISTICS
GENERAL CHARACTERISTICS ITEM DESCRIPTIONPLASTIC /NYLON/,COLOR BLACK,0.375 IN. DIA HEAD,0.300 IN. H HEAD,0.750 IN. LG O/A IN
OTHER ITEMS IN FSC 5325 — Fastening Devices
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5325-00-000-1884 5325-00-000-9988 5325-00-001-1567 5325-00-001-2043 5325-00-001-3842 5325-00-001-3858 5325-00-001-3871 5325-00-001-4317
SUBSTITUTES & CROSS-REFERENCES 1
H323-2-2-1Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
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 221SS5639?
221SS5639 is a STUD,FASTENER.
What parts can replace 221SS5639?
There is 1 known substitute for 221SS5639: H323-2-2-1. Substitute compatibility should be verified for your specific system.
What is the NSN for 221SS5639?
221SS5639 is cataloged in the U.S. Government catalog under NSN 5325-00-960-5224. 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.