In Stock 🚚 Ships Today

9/16" × 3-1/2" TRP Greaseable Wet Shackle Bolt Kit — Axle Set (4 Bolts + 4 Locknuts)

$45.00 SAVE $-45.00

TRP Greaseable Wet Shackle Bolt Kit — Axle SetComplete axle-set hardware kit built around the TRP SHB-91635-LUBE greaseable shackle bolt — four bolts paired with four matching
... Read more

There was an error submitting the form. Please try again.

false

Name: 9/16" × 3-1/2" TRP Greaseable Wet Shackle Bolt Kit — Axle Set (4 Bolts + 4 Locknuts)
Brand: Detroit Hitch
SKU: 854-7236-KIT4
Price: 45.00 USD
Availability: InStock

Fast Shipping

Easy Returns

Secure Checkout

Licensed Dealer

TRP Greaseable Wet Shackle Bolt Kit — Axle Set

Complete axle-set hardware kit built around the TRP SHB-91635-LUBE greaseable shackle bolt — four bolts paired with four matching 9/16"-18 UNF nylon-insert locknuts. Sized for a typical single-axle trailer shackle rebuild (4 shackle positions per axle).

The wet bolt design has an internal grease passage and an installed Zerk fitting, so the bushing can be lubricated under load without disassembling the shackle. This is the standard upgrade over plain (dry) shackle bolts on utility, cargo, boat, and equipment trailers — the lubrication path dramatically extends bushing life and keeps the suspension articulating smoothly.

⚙️ Specifications

Brand	TRP
Manufacturer Part #	SHB-91635-LUBE
Thread	9/16"-18 UNF
Overall length	3-1/2"
Thread length	5/8"
Thread diameter	0.5625"
Head style	Hex
Style	Greaseable (wet) — internal grease passage with installed Zerk fitting
Material	Steel, zinc plated
Locknut	9/16"-18 UNF nylon-insert (top-lock), included
Approx. weight	~0.30 lb per bolt + nut

📦 What's Included

4 × TRP SHB-91635-LUBE greaseable wet shackle bolts
4 × 9/16"-18 UNF nylon-insert locknuts
Complete hardware for a single-axle (4 shackle position) replacement — no additional fasteners required

🔧 Fitment

Fits standard 9/16" trailer leaf-spring shackles requiring a 3-1/2" greaseable shoulder bolt. Common application on utility, cargo, boat, dump, and equipment trailers using slipper or double-eye leaf springs. Replaces dry shackle bolts of the same dimensions. Confirm bolt length and thread match your shackle bushings before ordering.

✔ Why a Wet (Greaseable) Bolt

Internal grease passage feeds lubricant directly to the bushing surface
Extends bushing service life vs. dry bolts — less squeal, less wear
Allows scheduled lubrication without removing the shackle
Nylon-insert locknuts resist loosening from road vibration

🔄 Cross-References

📞 Questions? Call or text AAA Trailer: 517-225-1991 | AAATrailer.com — Same-day shipping from Howell, MI on in-stock orders. 1000s of trailer parts in stock, trusted 20+ years.