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74A410640-2001 — BOLT,INTERNALLY RELIEVED BODY

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

74A410640-2001: BOLT,INTERNALLY RELIEVED BODY.

The BOLT,INTERNALLY RELIEVED BODY is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: DEE, head_height: 0.093 INCHES NOMINAL IN, thread_class: 3A A, head_diameter: 1.000 INCHES NOMINAL IN, thread_length: 0.300 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-121-1656, 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
74A410640-2001
NSN: 5306-01-121-1656
FSC: 5306 — Bolts
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleDEE
head_height0.093 INCHES NOMINAL IN
thread_class3A A
head_diameter1.000 INCHES NOMINAL IN
thread_length0.300 INCHES NOMINAL IN
fastener_length1.750 INCHES NOMINAL IN
special_features2 KEYWAYS IN THD END 0.125 IN. MIN TO 0.130 IN. MAX W BY 0.245 IN. LG IN
style_designatorCOUNTERBORE UNTHREADED
thread_directionRIGHT-HAND
counterbore_depth1.558 INCHES NOMINAL IN
surface_treatmentCHROMATE OVERALL
NSN5306-01-121-1656
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 74A410640-2001 · 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
•
HEAD HEIGHT: 0.093 INCHES NOMINAL IN
•
FASTENER LENGTH: 1.750 INCHES NOMINAL IN
•
DISTANCE FROM CENTERLINE TO FLAT: 0.435 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.300 INCHES NOMINAL IN
•
CRITICALITY CODE JUSTIFICATION: AASY
•
STYLE DESIGNATOR: COUNTERBORE UNTHREADED
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-8844,CLASS 3,COND E2 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.625 INCHES IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.093 INCHES NOMINAL IN
FASTENER LENGTH1.750 INCHES NOMINAL IN
DISTANCE FROM CENTERLINE TO FLAT0.435 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
THREAD LENGTH0.300 INCHES NOMINAL IN
CRITICALITY CODE JUSTIFICATIONAASY
STYLE DESIGNATORCOUNTERBORE UNTHREADED
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-8844,CLASS 3,COND E2 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.625 INCHES IN
COUNTERBORE DEPTH1.558 INCHES NOMINAL IN
HEAD STYLEDEE
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 1
10115763Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 74A410640-2001?
74A410640-2001 is a BOLT,INTERNALLY RELIEVED BODY.
What parts can replace 74A410640-2001?
There is 1 known substitute for 74A410640-2001: 10115763. Substitute compatibility should be verified for your specific system.
What is the NSN for 74A410640-2001?
74A410640-2001 is cataloged in the U.S. Government catalog under NSN 5306-01-121-1656. 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.