QA1 KFR4 K Series 3-Piece Carbon Steel Female Rod End 1/4 in. Bore Right Hand Thread

Manufacturer

Part Number

KFR4

5 reviews

Sale Price

$7.03

Estimated ship date Saturday, November 21

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Show details for QA1 KFR4 K Series 3-Piece Carbon Steel Female Rod End 1/4 in. Bore Right Hand Thread

QA1 KFR4 K Series 3-Piece Carbon Steel Female Rod End 1/4 in. Bore Right Hand Thread — image 1

Product Details

The QA1 KFR4 is a K Series three-piece carbon steel female rod end bearing engineered to QA1's precision standards. Featuring a 1/4 in. bore and 1/4-28 right-hand threads, this rod end is built for demanding performance applications in racing, street rod, and suspension linkage systems.

The body is constructed from carbon steel with a protective coating for corrosion resistance, while the inner race (race) is made from alloy steel that is both corrosion and wear resistant. The ball is manufactured from 52100 bearing steel — heat treated, precision ground, and hard chrome plated — delivering superior strength and long service life.

Key Features:

Three-piece precision rod end construction
Female mounting configuration
1/4 in. bore diameter
1/4-28 right-hand thread
Ball: 52100 bearing steel, heat treated, hard chrome plated, precision ground
Race: alloy steel, corrosion and wear resistant
Body: carbon steel with protective corrosion-resistant coating
Available in inch dimensions for easy fitment
Compatible with grease fitting and stud configurations (sold separately)

QA1 K Series rod ends are a trusted choice for circle track, drag racing, and street performance builds where precision articulation and reliable load handling are essential.

Products specifications

A (+/-0.015)

1.312

Approx Bearing Weight

0.06

B (+0.0015/-0.0005)

0.25

Ball Dia Ref

0.5

C (+0.062/-0.031)

0.75

D (+/-0.010)

0.75

E (+/-0.010)

0.469

F (+/-0.010)

0.375

Grease Fitting

Heat-Treated

Yes

Jam Nut Included

Misalign Angle

Notes

Only rod end ball and race are heat-treated.

Quantity

Sold individually.

Rod End Attachment

Female threads

Rod End Ball Width

0.375 in.

Rod End Centerline Length

1.312 in.

Rod End Construction

3-piece

Rod End Finish

Zinc plated

Rod End Head Bore Size

0.250 in.

Rod End Head Diameter

0.750 in.

Rod End Head Width

0.375 in.

Rod End Material

Carbon steel

Rod End Misalign Angle (degrees)

16 degrees

Rod End Static Load Capacity

2,539 lbs.

Rod End Style

Metal to metal

Rod End Thread Size

1/4-28 RH in.

T (+/-0.005)

0.281

Thread Length

0.750 in.

Thread Type

Right Hand

Thread UNF-2B

1/4 -28

UTL Radical Static

2539

W (+0.000/-0.005)

0.375

Prop 65

WARNING: Cancer and Reproductive Harm. www.P65Warnings.ca.gov

Title

QA1 Suspension Rod End Bearing KFR4

hope product is as nice as portrayed

Emanuel Jones

Easy web searching and good quality parts for reasonable price..customer friendly too!!!!!!

JAKE05

Great selection and fast shipping. Not to meantion the lowest prices anywhere on the net.

jjrmonxx

Excellent Service! Product shipped out the day after being processed and was sent via overnight delivery. Autoplicity also offered the lowest cost available for the product online.

TMah

Very good prices and incredibly fast shipping. Shipping costs were a bit high but I would definitely use them again!

tgold22

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