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52-W-2291-803 — SCREW,CAP,SOCKET HEAD

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

52-W-2291-803: SCREW,CAP,SOCKET HEAD.

The SCREW,CAP,SOCKET HEAD is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: FLAT CHAMFER, head_height: 0.182 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.556 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN, thread_length: 1.125 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-189-9839, 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
52-W-2291-803
NSN: 5305-01-189-9839
FSC: 5305 — Screws
CAGE: 21439 — CURTISS-WRIGHT FLOW CONTROL SERVICE, LLC DBA ENGINEERED ARRESTING SYSTEMS - ESCO DIV CW FLOW CONTROL SVC LLC DBA (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleFLAT CHAMFER
head_height0.182 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN
thread_class3A A
head_diameter0.556 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
thread_length1.125 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN
fastener_length1.250 INCHES NOMINAL IN
hardness_rating38.0 ROCKWELL C MINIMUM OVERALL
locking_featureSTRIP THREADS
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL
width_across_flats0.1875 INCHES NOMINAL IN
NSN5305-01-189-9839
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 52-W-2291-803 · 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: 0.1875 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.182 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN
•
FASTENER LENGTH: 1.250 INCHES NOMINAL IN
•
THREAD LENGTH: 1.125 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN
•
HARDNESS RATING: 38.0 ROCKWELL C MINIMUM OVERALL
•
NOMINAL THREAD DIAMETER: 0.375 INCHES IN
•
HEAD STYLE: FLAT CHAMFER
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.1875 INCHES NOMINAL IN
HEAD HEIGHT0.182 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN
FASTENER LENGTH1.250 INCHES NOMINAL IN
THREAD LENGTH1.125 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN
HARDNESS RATING38.0 ROCKWELL C MINIMUM OVERALL
NOMINAL THREAD DIAMETER0.375 INCHES IN
HEAD STYLEFLAT CHAMFER
THREAD DIRECTIONRIGHT-HAND
LOCKING FEATURESTRIP THREADS
SURFACE TREATMENTCADMIUM OVERALL
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-000-0094 5305-00-000-1397 5305-00-000-2625 5305-00-000-3669 5305-00-000-3830 5305-00-000-3831
SUBSTITUTES & CROSS-REFERENCES 1
72531L-6C-20CSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 52-W-2291-803?
52-W-2291-803 is a SCREW,CAP,SOCKET HEAD.
What parts can replace 52-W-2291-803?
There is 1 known substitute for 52-W-2291-803: 72531L-6C-20C. Substitute compatibility should be verified for your specific system.
What is the NSN for 52-W-2291-803?
52-W-2291-803 is cataloged in the U.S. Government catalog under NSN 5305-01-189-9839. 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.