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749598 — BOLT,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

749598: BOLT,MACHINE.

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include MATERIAL: NICKEL ALLOY OVERALL, HOLE TYPE: DRILLEDDRILLED, HEAD STYLE: DOUBLE HEXAGON W/HOLEDOUBLE HEXAGON W/HOLE, GRIP LENGTH: 0.060 INCHES NOMINAL0.060 INCHES NOMINAL IN, HEAD HEIGHT: 0.248 INCHES MINIMUM AND 0.248 INCHES MINIMUM AND 0.268 INCHES MAXIMUM0.268 INCHES MAXIMUM IN, THREAD CLASS: 3A3A. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-133-9843, 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
749598
NSN: 5306-01-133-9843
FSC: 5306 — Bolts
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
MATERIALNICKEL ALLOY OVERALL
HOLE TYPEDRILLEDDRILLED
HEAD STYLEDOUBLE HEXAGON W/HOLEDOUBLE HEXAGON W/HOLE
GRIP LENGTH0.060 INCHES NOMINAL0.060 INCHES NOMINAL IN
HEAD HEIGHT0.248 INCHES MINIMUM AND 0.248 INCHES MINIMUM AND 0.268 INCHES MAXIMUM0.268 INCHES MAXIMUM IN
THREAD CLASS3A3A
HOLE DIAMETER0.042 INCHES MINIMUM AND 0.042 INCHES MINIMUM AND 0.052 INCHES MAXIMUM0.052 INCHES MAXIMUM IN
HOLE QUANTITY44
THREAD LENGTH0.648 INCHES NOMINAL0.648 INCHES NOMINAL IN
FASTENER LENGTH0.698 INCHES MINIMUM AND 0.698 INCHES MINIMUM AND 0.718 INCHES MAXIMUM0.718 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HANDRIGHT-HAND
WIDTH BETWEEN FLATS0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN
NSN5306-01-133-9843
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 749598 · 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
•
EXTENDED WASHER THICKNESS: 0.040 INCHES NOMINAL0.040 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.248 INCHES MINIMUM AND 0.248 INCHES MINIMUM AND 0.268 INCHES MAXIMUM0.268 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.698 INCHES MINIMUM AND 0.698 INCHES MINIMUM AND 0.718 INCHES MAXIMUM0.718 INCHES MAXIMUM IN
•
EXTENDED WASHER DIAMETER: 0.365 INCHES MINIMUM AND 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM0.385 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.648 INCHES NOMINAL0.648 INCHES NOMINAL IN
•
SHANK UNTHREADED HOLE DIAMETER: 0.060 INCHES MINIMUM AND 0.060 INCHES MINIMUM AND 0.080 INCHES MAXIMUM FIRST HOLE0.080 INCHES MAXIMUM FIRST HOLE IN
•
HOLE CONFIGURATION STYLE: DOUBLE HEXAGON LONGITUDINAL HOLEDOUBLE HEXAGON LONGITUDINAL HOLE
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS7471 ASSN STD SINGLE MATERIAL RESPONSE OVERALLAMS7471 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS
EXTENDED WASHER THICKNESS0.040 INCHES NOMINAL0.040 INCHES NOMINAL IN
HEAD HEIGHT0.248 INCHES MINIMUM AND 0.248 INCHES MINIMUM AND 0.268 INCHES MAXIMUM0.268 INCHES MAXIMUM IN
FASTENER LENGTH0.698 INCHES MINIMUM AND 0.698 INCHES MINIMUM AND 0.718 INCHES MAXIMUM0.718 INCHES MAXIMUM IN
EXTENDED WASHER DIAMETER0.365 INCHES MINIMUM AND 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM0.385 INCHES MAXIMUM IN
THREAD LENGTH0.648 INCHES NOMINAL0.648 INCHES NOMINAL IN
SHANK UNTHREADED HOLE DIAMETER0.060 INCHES MINIMUM AND 0.060 INCHES MINIMUM AND 0.080 INCHES MAXIMUM FIRST HOLE0.080 INCHES MAXIMUM FIRST HOLE IN
HOLE CONFIGURATION STYLEDOUBLE HEXAGON LONGITUDINAL HOLEDOUBLE HEXAGON LONGITUDINAL HOLE
MATERIAL DOCUMENT AND CLASSIFICATIONAMS7471 ASSN STD SINGLE MATERIAL RESPONSE OVERALLAMS7471 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.190 INCHES0.190 INCHES IN
HEAD STYLEDOUBLE HEXAGON W/HOLEDOUBLE HEXAGON W/HOLE
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: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 749598?
749598 is a BOLT,MACHINE.
What is the NSN for 749598?
749598 is cataloged in the U.S. Government catalog under NSN 5306-01-133-9843. 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.