Externally Threaded Ring

Model / MPN: A51H20581-13 | NSN: 5365-00-008-5691

A cylindrically shaped item with a concentric bore and a peripheral thread over its entire length or over a portion thereof. One face is drilled, slotted, knurled, or has projecting lugs for installation and/or removal purposes. Excludes retainer, optical element.

Product Details

NATO Stock Number

5365-00-008-5691

Sold in multiples of

1 EA

DEMIL

Thread Class

Thread Direction

Right-hand

Casehardening Indicator

Not casehardened

Chamfer Angle In Deg

45.0

Chamfer Length

0.030 inches

Overall Length

1.250 inches

Diameter

Between 2.900 inches and 2.910 inches

Thread Size

3.250-12

Bore Diameter

Between 2.900 inches and 2.910 inches

Bore Shape

Straight

Screw Thread Series Designator

Unj

Drive Type

Lug face

Material Hardness Rating

Between 38.0 rockwell c and 45.0 rockwell c

Thread Location

End opposite drive end

Accommodation Type And Quantity

4 lugs

Angle Between Accommodations In Deg

90.0

Radius From Geometric Axis To Accommodation

Between 1.575 inches and 1.595 inches

Beveled Thread

Included

Bore Annular Internal Serration

Not included

Setscrew Locking Notch

Not included

Bore Edge Process

Chamfered

Process End Location

End opposite drive end

Height

Between 3.230 inches and 3.270 inches

Material

Steel, ams 5659

Material

Steel comp xm-12

Surface Treatment

Passivated, mil-s-5002

Surface Treatment

Passivated, mil-s-5002

A51H20581 Series Parts

A51H20581-13

Pricing and Availability

Send us a request for quote using the form below. Our team will contact you with an up to date pricing and availability quote ASAP.

Certified Quality Assurance

ISO 9001:2015 + AS9120B
Counterfeit Parts Prevention
100% Product Inspections
7 Year Record Retention
On Time Delivery
HAZMAT Certified
Worldwide Shipping

A51H20581-13 Cross Reference

A51H20581-13