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91272A770 — BOLT,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

91272A770: BOLT,MACHINE.

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: DOUBLE HEXAGON EXTENDED WASHER, head_height: 0.500 INCHES NOMINAL IN, thread_class: 3A A, thread_length: 1.500 INCHES NOMINAL IN, fastener_length: 2.500 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-398-3600, 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
91272A770
NSN: 5306-01-398-3600
FSC: 5306 — Bolts
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleDOUBLE HEXAGON EXTENDED WASHER
head_height0.500 INCHES NOMINAL IN
thread_class3A A
thread_length1.500 INCHES NOMINAL IN
fastener_length2.500 INCHES NOMINAL IN
hardness_rating37.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
width_between_flats0.493 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN
nominal_thread_diameter0.500 INCHES IN
extended_washer_diameter0.735 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
minimum_tensile_strength170000 POUNDS PER SQUARE INCH LBS
NSN5306-01-398-3600
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 91272A770 · 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: 0.129 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.500 INCHES NOMINAL IN
•
FASTENER LENGTH: 2.500 INCHES NOMINAL IN
•
EXTENDED WASHER DIAMETER: 0.735 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
•
THREAD LENGTH: 1.500 INCHES NOMINAL IN
•
HARDNESS RATING: 37.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
•
NOMINAL THREAD DIAMETER: 0.500 INCHES IN
•
HEAD STYLE: DOUBLE HEXAGON EXTENDED WASHER
TECHNICAL CHARACTERISTICS
EXTENDED WASHER THICKNESS0.129 INCHES NOMINAL IN
HEAD HEIGHT0.500 INCHES NOMINAL IN
FASTENER LENGTH2.500 INCHES NOMINAL IN
EXTENDED WASHER DIAMETER0.735 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
THREAD LENGTH1.500 INCHES NOMINAL IN
HARDNESS RATING37.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
NOMINAL THREAD DIAMETER0.500 INCHES IN
HEAD STYLEDOUBLE HEXAGON EXTENDED WASHER
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS0.493 INCHES MINIMUM AND 0.502 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 2
91271A770Reference document
Same NSN cross-reference
Reference document — Secondary reference
91272A722Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 91272A770?
91272A770 is a BOLT,MACHINE.
What parts can replace 91272A770?
There are 2 known substitutes for 91272A770: 91271A770, 91272A722. Substitute compatibility should be verified for your specific system.
What is the NSN for 91272A770?
91272A770 is cataloged in the U.S. Government catalog under NSN 5306-01-398-3600. 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.