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Technical Data Sheet
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A25-2B — BOLT,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

A25-2B: BOLT,MACHINE.

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: HEXAGON, grip_length: 0.160 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN, head_height: 0.080 INCHES MINIMUM AND 0.086 INCHES MAXIMUM IN, thread_length: 0.360 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN, fastener_length: 0.560 INCHES MINIMUM AND 0.600 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-452-3522, 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
A25-2B
NSN: 5306-00-452-3522
FSC: 5306 — Bolts
CAGE: K7766 — BSI STANDARDS LIMITED (GBR)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
grip_length0.160 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN
head_height0.080 INCHES MINIMUM AND 0.086 INCHES MAXIMUM IN
thread_length0.360 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
fastener_length0.560 INCHES MINIMUM AND 0.600 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
features_providedFINISHED HEAD
surface_treatmentCADMIUM OVERALL
width_between_flats0.243 INCHES MINIMUM AND 0.248 INCHES MAXIMUM IN
nominal_thread_diameter3.6 MILLIMETERS MM
thread_series_designatorBA
NSN5306-00-452-3522
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: A25-2B · 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: 0.080 INCHES MINIMUM AND 0.086 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.560 INCHES MINIMUM AND 0.600 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.360 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 3.6 MILLIMETERS MM
•
FEATURES PROVIDED: FINISHED HEAD
•
HEAD STYLE: HEXAGON
•
THREAD DIRECTION: RIGHT-HAND
•
GRIP LENGTH: 0.160 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.080 INCHES MINIMUM AND 0.086 INCHES MAXIMUM IN
FASTENER LENGTH0.560 INCHES MINIMUM AND 0.600 INCHES MAXIMUM IN
THREAD LENGTH0.360 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER3.6 MILLIMETERS MM
FEATURES PROVIDEDFINISHED HEAD
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
GRIP LENGTH0.160 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN
WIDTH BETWEEN FLATS0.243 INCHES MINIMUM AND 0.248 INCHES MAXIMUM IN
SURFACE TREATMENTCADMIUM OVERALL
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
99-1008149Reference document
Same NSN cross-reference
Reference document — Informative reference only
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 A25-2B?
A25-2B is a BOLT,MACHINE.
What parts can replace A25-2B?
There is 1 known substitute for A25-2B: 99-1008149. Substitute compatibility should be verified for your specific system.
What is the NSN for A25-2B?
A25-2B is cataloged in the U.S. Government catalog under NSN 5306-00-452-3522. 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.