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Technical Data Sheet
PartsTable / COMPONENT / 8-52-161
8-52-161 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

PISTON,LINEAR ACTUATING CYLINDER. Key specifications include width: 2.500 INCHES NOMINAL IN, length: 4.000 INCHES NOMINAL IN, material: ALUMINUM ALLOY, hole_diameter: 0.235 INCHES NOMINAL IN, body_thickness: 0.378 INCHES NOMINAL IN, flange_thickness: 0.313 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-776-7688, 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
8-52-161
NSN: 5305-00-776-7688
FSC: 5305
CAGE: 83298 — ALLIED SIGNAL INC AEROSPACE EQUIPMENT SYSTEMS EATONTOWN SITE (USA)
SPECIFICATIONS
width2.500 INCHES NOMINAL IN
length4.000 INCHES NOMINAL IN
materialALUMINUM ALLOY
hole_diameter0.235 INCHES NOMINAL IN
body_thickness0.378 INCHES NOMINAL IN
flange_thickness0.313 INCHES NOMINAL IN
surface_treatmentANODIZE
securing_device_typeTHREADED FASTENER
peripheral_shape_styleRECTANGLE, MULTI HOLES
end_item_identificationUNIT,FLUSHING AND SCRUBBER, ILLINOIS TOOL WORKS, INC., 8-52T-04
hole_quantity_along_width2
first_recess_inside_height2.566 INCHES NOMINAL IN
NSN5305-00-776-7688
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 8-52-161 · 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
•
SCREW MATERIAL: STEEL COMP 1118
•
HEAD STYLE: HEXAGON
•
INTERNAL DRIVE STYLE: SLOT
•
THREAD LENGTH: 0.625 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.625 INCHES NOMINAL IN
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
SCREW MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-633 CANCELED FED SPEC SINGLE MATERIAL RESPONSE
•
THREAD CLASS: 2A A
TECHNICAL CHARACTERISTICS (FLIS)
SCREW MATERIALSTEEL COMP 1118
HEAD STYLEHEXAGON
INTERNAL DRIVE STYLESLOT
THREAD LENGTH0.625 INCHES MAXIMUM IN
FASTENER LENGTH0.625 INCHES NOMINAL IN
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
SCREW MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-633 CANCELED FED SPEC SINGLE MATERIAL RESPONSE
THREAD CLASS2A A
SCREW SURFACE TREATMENTCADMIUM
THREAD QUANTITY PER INCH20
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
8-52-16-1Interchangeable
interchangeable cross-reference
interchangeable
8-52-16Interchangeable
interchangeable cross-reference
interchangeable
776-7688Interchangeable
interchangeable cross-reference
interchangeable
67688Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 8-52-161?
8-52-161 is a PISTON,LINEAR ACTUATING CYLINDER.
What parts can replace 8-52-161?
There are 4 known substitutes for 8-52-161: 8-52-16-1, 8-52-16, 776-7688 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 8-52-161?
8-52-161 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-776-7688. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026