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1285M91G02 — BOLT,EXTERNALLY RELIEVED BODY

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

1285M91G02: BOLT,EXTERNALLY RELIEVED BODY.

The BOLT,EXTERNALLY RELIEVED BODY is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY OVERALL, head_style: ROUND W/WRENCH FLATS CHAMFERED, head_height: 0.075 INCHES MINIMUM AND 0.085 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.450 INCHES MINIMUM AND 0.470 INCHES MAXIMUM IN, thread_length: 0.738 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-214-2759, 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
1285M91G02
NSN: 5306-01-214-2759
FSC: 5306 — Bolts
CAGE: 07482 — GENERAL ELECTRIC COMPANY (USA)
SPECIFICATIONS
materialNICKEL ALLOY OVERALL
head_styleROUND W/WRENCH FLATS CHAMFERED
head_height0.075 INCHES MINIMUM AND 0.085 INCHES MAXIMUM IN
thread_class3A A
head_diameter0.450 INCHES MINIMUM AND 0.470 INCHES MAXIMUM IN
thread_length0.738 INCHES NOMINAL IN
fastener_length1.648 INCHES MINIMUM AND 1.668 INCHES MAXIMUM IN
special_features3 PINS EQUALLY SPACED AND KEY ON TOP OF HEAD
thread_directionRIGHT-HAND
width_between_flats0.320 INCHES MINIMUM AND 0.340 INCHES MAXIMUM IN
nominal_thread_diameter0.250 INCHES IN
first_diameter_from_head0.258 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
NSN5306-01-214-2759
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 1285M91G02 · 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: 0.075 INCHES MINIMUM AND 0.085 INCHES MAXIMUM IN
•
FASTENER LENGTH: 1.648 INCHES MINIMUM AND 1.668 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.738 INCHES NOMINAL IN
•
FIRST DIAMETER FROM HEAD: 0.258 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
•
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER: 0.560 INCHES MINIMUM AND 0.580 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF THIRD DIAMETER: 0.910 INCHES MINIMUM AND 0.930 INCHES MAXIMUM IN
•
HEAD STYLE: ROUND W/WRENCH FLATS CHAMFERED
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.075 INCHES MINIMUM AND 0.085 INCHES MAXIMUM IN
FASTENER LENGTH1.648 INCHES MINIMUM AND 1.668 INCHES MAXIMUM IN
THREAD LENGTH0.738 INCHES NOMINAL IN
FIRST DIAMETER FROM HEAD0.258 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER0.560 INCHES MINIMUM AND 0.580 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.250 INCHES IN
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF THIRD DIAMETER0.910 INCHES MINIMUM AND 0.930 INCHES MAXIMUM IN
HEAD STYLEROUND W/WRENCH FLATS CHAMFERED
THREAD DIRECTIONRIGHT-HAND
SECOND DIAMETER FROM HEAD0.215 INCHES MINIMUM AND 0.225 INCHES MAXIMUM 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 1
1285M91G01Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1285M91G02?
1285M91G02 is a BOLT,EXTERNALLY RELIEVED BODY.
What parts can replace 1285M91G02?
There is 1 known substitute for 1285M91G02: 1285M91G01. Substitute compatibility should be verified for your specific system.
What is the NSN for 1285M91G02?
1285M91G02 is cataloged in the U.S. Government catalog under NSN 5306-01-214-2759. 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.