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21852-1 — PISTON,HYDRAULIC BRAKE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

21852-1: PISTON,HYDRAULIC BRAKE.

The PISTON,HYDRAULIC BRAKE is a the manufacturer industrial component. Key specifications include end_item_identification: CRANE ROUGH T, part_name_assigned_by_controlling_agency: PISTON, FIN. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-007-3228, 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
21852-1
NSN: 5305-00-007-3228
NIINs: 000073228, 013863563, 016223094
FSC: 5305 — Screws
CAGE: 31361 — WOODWARD, INC. (USA)
SPECIFICATIONS
end_item_identificationCRANE ROUGH T
part_name_assigned_by_controlling_agencyPISTON, FIN
NSN5305-00-007-3228
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 21852-1 · 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
•
WIDTH ACROSS FLATS: 0.156 INCHES MINIMUM AND 0.159 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.185 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
•
FASTENER LENGTH: 1.335 INCHES MINIMUM AND 1.375 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.875 INCHES MINIMUM IN
•
HOLE CONFIGURATION STYLE: ROUND LONGITUDINAL HOLE
•
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
•
HEAD STYLE: FLAT CHAMFER
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.156 INCHES MINIMUM AND 0.159 INCHES MAXIMUM IN
HEAD HEIGHT0.185 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
FASTENER LENGTH1.335 INCHES MINIMUM AND 1.375 INCHES MAXIMUM IN
THREAD LENGTH0.875 INCHES MINIMUM IN
HOLE CONFIGURATION STYLEROUND LONGITUDINAL HOLE
NOMINAL THREAD DIAMETER0.190 INCHES IN
HEAD STYLEFLAT CHAMFER
THREAD DIRECTIONRIGHT-HAND
INTERNAL DRIVE STYLEHEXAGON
THREAD CLASS3A A
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 21852-1?
21852-1 is a PISTON,HYDRAULIC BRAKE.
What is the NSN for 21852-1?
21852-1 is cataloged in the U.S. Government catalog under NSN 5305-00-007-3228. 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.