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5A74009 — BOLT,INTERNAL WRENCHING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

5A74009: BOLT,INTERNAL WRENCHING.

The BOLT,INTERNAL WRENCHING is a the manufacturer industrial component. Key specifications include material: STEEL COMP 302 OVERALL, hole_type: DRILLED, head_style: FLAT CHAMFER, head_height: 0.150 INCHES MINIMUM AND 0.170 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.550 INCHES MINIMUM AND 0.570 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-879-2127, 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
5A74009
NSN: 5306-00-879-2127
FSC: 5306 — Bolts
CAGE: 11599 — TRIUMPH ENGINE CONTROL SYSTEMS LLC (USA)
SPECIFICATIONS
materialSTEEL COMP 302 OVERALL
hole_typeDRILLED
head_styleFLAT CHAMFER
head_height0.150 INCHES MINIMUM AND 0.170 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.550 INCHES MINIMUM AND 0.570 INCHES MAXIMUM IN
hole_diameter0.055 INCHES NOMINAL IN
hole_quantity4
thread_length0.380 INCHES MINIMUM AND 0.460 INCHES MAXIMUM IN
fastener_length2.230 INCHES MINIMUM AND 2.270 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
width_across_flats0.187 INCHES MINIMUM AND 0.191 INCHES MAXIMUM IN
NSN5306-00-879-2127
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 5A74009 · 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
•
FOURTH DIAMETER FROM HEAD: 0.230 INCHES MINIMUM AND 0.234 INCHES MAXIMUM IN
•
WIDTH ACROSS FLATS: 0.187 INCHES MINIMUM AND 0.191 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.150 INCHES MINIMUM AND 0.170 INCHES MAXIMUM IN
•
FASTENER LENGTH: 2.230 INCHES MINIMUM AND 2.270 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.380 INCHES MINIMUM AND 0.460 INCHES MAXIMUM IN
•
HOLE CONFIGURATION STYLE: ROUND LONGITUDINAL HOLE
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5637 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
FIRST DIAMETER FROM HEAD: 0.338 INCHES MINIMUM AND 0.348 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
FOURTH DIAMETER FROM HEAD0.230 INCHES MINIMUM AND 0.234 INCHES MAXIMUM IN
WIDTH ACROSS FLATS0.187 INCHES MINIMUM AND 0.191 INCHES MAXIMUM IN
HEAD HEIGHT0.150 INCHES MINIMUM AND 0.170 INCHES MAXIMUM IN
FASTENER LENGTH2.230 INCHES MINIMUM AND 2.270 INCHES MAXIMUM IN
THREAD LENGTH0.380 INCHES MINIMUM AND 0.460 INCHES MAXIMUM IN
HOLE CONFIGURATION STYLEROUND LONGITUDINAL HOLE
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5637 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
FIRST DIAMETER FROM HEAD0.338 INCHES MINIMUM AND 0.348 INCHES MAXIMUM IN
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER1.610 INCHES MINIMUM AND 1.630 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.312 INCHES IN
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 5A74009?
5A74009 is a BOLT,INTERNAL WRENCHING.
What is the NSN for 5A74009?
5A74009 is cataloged in the U.S. Government catalog under NSN 5306-00-879-2127. 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.