PartsTable
Technical Data Sheet
181858-1 ✓ 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

The SCREW,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OVERALL, head_style: FLAT CHAMFER, head_height: 0.125 INCHES NOMINAL IN, thread_class: 2A A, head_diameter: 0.250 INCHES NOMINAL IN, thread_length: 0.156 INCHES MINIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-056-8265, 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
181858-1
NSN: 5305-00-056-8265
FSC: 5305
CAGE: 71791 — CURTISS-WRIGHT CONTROLS, INC. DBA CURTISS WRIGHT DIV ACTUATION DIVISION (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
head_styleFLAT CHAMFER
head_height0.125 INCHES NOMINAL IN
thread_class2A A
head_diameter0.250 INCHES NOMINAL IN
thread_length0.156 INCHES MINIMUM IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length0.281 INCHES NOMINAL IN
shoulder_length0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM FIRST SHOULDER IN
thread_directionRIGHT-HAND
shoulder_diameter0.121 INCHES MINIMUM AND 0.124 INCHES MAXIMUM FIRST SHOULDER IN
surface_treatmentPASSIVATE OVERALL
NSN5305-00-056-8265
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 181858-1 · 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
INTERNAL DRIVE STYLE: CROSS RECESS TYPE 1
NOMINAL THREAD DIAMETER: 0.112 INCHES IN
THREAD LENGTH: 0.156 INCHES MINIMUM IN
THREAD QUANTITY PER INCH: 40
THREAD CLASS: 2A A
FASTENER LENGTH: 0.281 INCHES NOMINAL IN
HEAD DIAMETER: 0.250 INCHES NOMINAL IN
SHOULDER SHAPE: ROUND FIRST SHOULDER
TECHNICAL CHARACTERISTICS (FLIS)
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
NOMINAL THREAD DIAMETER0.112 INCHES IN
THREAD LENGTH0.156 INCHES MINIMUM IN
THREAD QUANTITY PER INCH40
THREAD CLASS2A A
FASTENER LENGTH0.281 INCHES NOMINAL IN
HEAD DIAMETER0.250 INCHES NOMINAL IN
SHOULDER SHAPEROUND FIRST SHOULDER
THREAD DIRECTIONRIGHT-HAND
HEAD STYLEFLAT CHAMFER
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
G-421Interchangeable
interchangeable cross-reference
interchangeable
LUBRICANT24Interchangeable
interchangeable cross-reference
interchangeable
G-7421Interchangeable
interchangeable cross-reference
interchangeable
01845-1644Interchangeable
interchangeable cross-reference
interchangeable
BA1191PC7Interchangeable
interchangeable cross-reference
interchangeable
N5002-156Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
Ready to buy 181858-1?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 181858-1?
181858-1 is a SCREW,SHOULDER.
What parts can replace 181858-1?
There are 10 known substitutes for 181858-1: G-421, LUBRICANT24, G-7421 and 7 more. Substitute compatibility should be verified for your specific system.
Is 181858-1 still available?
181858-1 is currently cancelled.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 181858-1