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ISO-8-4 — BOLT,SQUARE NECK

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

ISO-8-4: BOLT,SQUARE NECK.

The BOLT,SQUARE NECK is a the manufacturer industrial component. Key specifications include end_item_identification: NSN 2320-01-097-0249 M978 HEMTT. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-166-0718, 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
ISO-8-4
NSN: 5306-01-166-0718
FSC: 5306 — Bolts
CAGE: 92858 — HANNAY REELS INC (USA)
SPECIFICATIONS
end_item_identificationNSN 2320-01-097-0249 M978 HEMTT
NSN5306-01-166-0718
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: ISO-8-4 · 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
TECHNICAL CHARACTERISTICS
END ITEM IDENTIFICATIONNSN 2320-01-097-0249 M978 HEMTT
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-001-1276 5306-00-001-1949 5306-00-001-1988 5306-00-001-1989 5306-00-001-1990 5306-00-001-1991 5306-00-001-1993 5306-00-001-2017
SUBSTITUTES & CROSS-REFERENCES 3
2BA596Reference document
Same NSN cross-reference
Reference document — Secondary reference
617G-ISO-8-4Reference document
Same NSN cross-reference
Reference document — Secondary reference
9904.0213Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 ISO-8-4?
ISO-8-4 is a BOLT,SQUARE NECK.
What parts can replace ISO-8-4?
There are 3 known substitutes for ISO-8-4: 2BA596, 617G-ISO-8-4, 9904.0213. Substitute compatibility should be verified for your specific system.
What is the NSN for ISO-8-4?
ISO-8-4 is cataloged in the U.S. Government catalog under NSN 5306-01-166-0718. This indicates validated use in U.S. government and defense supply chains.
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