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All measurements indicate the wheel diameter by the tread width.

The below capacity ranges indicate the working (dynamic) load that each caster will support. A safety factor should be included in your formula to determine your required load rating per caster.

W/(C-1)=R W is total weight needed to move. C is total number of casters required. R is ideal load rating, with safety factor built in. Divide the total load weight by one less caster than you will use to safely determine load rating.

Plate dimensions shown are overall mounting plate size.
When replacing existing casters, select the closest plate size and verify bolt-hole compatibility.
BHP = Bolt Hole Pattern, shown under each plate.

BHP: 1-3/4″ × 2-7/8″, slotted to 3″
BHP: 1-3/4″ × 2-7/8″, slotted to 3″
BHP: 1-3/4″ × 2-15/16″ slotted to 2-3/8″ × 3-3/8″
BHP: 1-3/4″ × 2-15/16″ slotted to 2-3/8″ × 3-3/8″
BHP: 2-5/8” X 3-5/8” (Slotted to 3” x 3”)
BHP: 2-5/8” X 3-5/8” (Slotted to 3” x 3”)
BHP: 2-7/16" x 4-15/16" slotted to 3-3/8" x 5-1/4"
BHP: 2-7/16" x 4-15/16" slotted to 3-3/8" x 5-1/4"
(3″ Wide Casters), Industry-Standard
(3″ Wide Casters), Industry-Standard
BHP: 3-3/8" x 5-1/4" slotted to 4-1/8" x 6-1/8"
BHP: 3-3/8" x 5-1/4" slotted to 4-1/8" x 6-1/8"
BHP: 4-1/8" x 6" slotted to 4-1/2" x 6-1/8"
BHP: 4-1/8" x 6" slotted to 4-1/2" x 6-1/8"
View All • 21 Plate Sizes
View All • 21 Plate Sizes
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Caster Wheel Materials & Selection Guide

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5/16" x 1" Threaded Stem Casters

Stem: 5/16 x 1 in threadedWheel 50 mm (2 in) twin nylonCapacity: 75 lb each
Shepherd Pacer PPA50507 twin wheel casters on a 5/16 x 1 in threaded stem, for chairs, displays, store fixtures and office furniture. Each comes in four finish codes (WA, FB, BC, SC), with or without a side lock brake. The nylon twin wheels list -40 to 250°F.
75 lbs
TieredPricing
PPA50507WA - Pacer Hooded Stem Caster - 50mm Diameter - 5/16" x 1" Threaded Stem - 75 lbs Capacity - Nylon Wheels shepherd
Ships in 1-3 Business Days
Shepherd PPA50507WA 50mm Dual Wheel Caster 5/16" x 1" Stem – 75 lb
Part # PPA50507WA
from $30.00
Volume pricing available
NylonThreaded Stem
Load rating
75 lbs
Size2" x 1-11/16"
Capacity75 lbs
WheelNylon
MountThreaded Stem
Type—
More Details Less Details
Width 1-11/16"
Height 2-1/2"
Temp Range -40°F to 250°F
Frame Zinc Plated Steel
PPA50507WA Pacer Hooded Stem Caster - 50mm Diameter - 5/16" x 1" Threaded StemThis...
Shop Product
75 lbs
TieredPricing
PPA50507FB - Pacer Hooded Stem Caster - 50mm Diameter - 5/16" x 1" Threaded Stem - 75 lbs Capacity - Nylon Wheels shepherd
Ships in 1-3 Business Days
Shepherd PPA50507FB 50mm Nylon Dual Wheel Caster 5/16"x1" Stem – 75 lb
Part # PPA50507FB
from $30.00
Volume pricing available
NylonThreaded Stem
Load rating
75 lbs
Size2" x 1-11/16"
Capacity75 lbs
WheelNylon
MountThreaded Stem
Type—
More Details Less Details
Width 1-11/16"
Height 2-1/2"
Temp Range -40°F to 250°F
Frame Zinc Plated Steel
PPA50507FB - Pacer Hooded Stem Caster - 50mm Diameter - 5/16" x 1" Threaded...
Shop Product
75 lbs
TieredPricing
PPA50507BC - Bright Chrome Finish - Pacer Hooded Stem Caster - 50mm Diameter - 5/16" x 1" Threaded Stem - 75 lbs Capacity - Nylon Wheels shepherd
Ships in 1-3 Business Days
Shepherd PPA50507BC 50mm Dual Wheel Caster – 75 lb
Part # PPA50507BC
from $30.00
Volume pricing available
NylonThreaded Stem
Load rating
75 lbs
Size2" x 1-11/16"
Capacity75 lbs
WheelNylon
MountStem 5/16" x 1"
Type—
More Details Less Details
Width 1-11/16"
Height 2-1/2"
Temp Range -40°F to 250°F
Frame Zinc Plated Steel
PPA50507BC - Bright Chrome Finish - Pacer Hooded Stem Caster - 50mm Diameter -...
Shop Product
75 lbs
TieredPricing
PPA50507SC - Pacer Hooded Stem Caster - 50mm Diameter - 5/16" x 1" Threaded Stem - 75 lbs Capacity - Nylon Wheels shepherd
Ships in 1-3 Business Days
Shepherd PPA50507SC 50mm Dual Nylon Wheel Caster – 75 lb
Part # PPA50507SC
from $30.00
Volume pricing available
NylonThreaded Stem
Load rating
75 lbs
Size2" x 1-11/16"
Capacity75 lbs
WheelNylon
MountThreaded Stem
Type—
More Details Less Details
Width 1-11/16"
Height 2-1/2"
Temp Range -40°F to 250°F
Frame Zinc Plated Steel
PPA50507SC - Pacer Hooded Stem Caster - 50mm Diameter - 5/16" x 1" Threaded...
Shop Product
75 lbs
TieredPricing
PPA50507FB-B - Locking Pacer Hooded Stem Caster - 50mm Diameter - 5/16" x 1" Threaded Stem - 75 lbs Capacity - Nylon Wheels shepherd
Ships in 1-3 Business Days
Shepherd PPA50507FB-B 2" Nylon Dual Wheel Caster With Brake – 75 lb
Part # PPA50507FB-B
$32.00
Volume pricing available
NylonThreaded Stem
Load rating
75 lbs
Size2" x 1-11/16"
Capacity75 lbs
WheelNylon
MountThreaded Stem
TypeSide Lock Brake
More Details Less Details
Width 1-11/16"
Height 2-1/2"
Temp Range -40°F to 250°F
Brake Side Lock Brake
Frame Zinc Plated Steel
PPA50507FB-B - Pacer Hooded Stem Caster - 50mm Diameter - 5/16" x 1" Threaded...
Shop Product
75 lbs
TieredPricing
PPA50507WA-B - Pacer Hooded Caster w/Brake - 50mm Diameter - 5/16" x 1" Threaded Stem - 75 lbs Capacity - Nylon Wheels shepherd
Ships in 1-3 Business Days
Shepherd PPA50507WA-B 50mm Dual Nylon Wheel Caster w/Brake – 75 lb
Part # PPA50507WA-B
$32.00
Volume pricing available
NylonThreaded Stem
Load rating
75 lbs
Size2" x 1-11/16"
Capacity75 lbs
WheelNylon
MountThreaded Stem
TypeSide Lock Brake
More Details Less Details
Width 1-11/16"
Height 2-1/2"
Temp Range -40°F to 250°F
Brake Side Lock Brake
Frame Zinc Plated Steel
PPA50507WA-B Pacer Hooded Chair Caster - 50mm Diameter - 5/16" x 1" Threaded StemThis...
Shop Product
75 lbs
TieredPricing
PPA50507SC-B - Pacer Hooded Stem Caster - 50mm Diameter - 5/16" x 1" Threaded Stem - 75 lbs Capacity - Nylon Wheels shepherd
Ships in 1-3 Business Days
Shepherd PPA50507SC-B 50mm Dual Nylon Wheel Caster with Brake – 75 lb
Part # PPA50507SC-B
$32.00
Volume pricing available
NylonThreaded Stem
Load rating
75 lbs
Size2" x 1-11/16"
Capacity75 lbs
WheelNylon
MountThreaded Stem
TypeSide Lock Brake
More Details Less Details
Width 1-11/16"
Height 2-1/2"
Temp Range -40°F to 250°F
Brake Side Lock Brake
Frame Zinc Plated Steel
PPA50507SC-B - Pacer Hooded Locking Stem Caster - 50mm Diameter - 5/16" x 1"...
Shop Product
75 lbs
TieredPricing
PPA50507BC-B - Bright Chrome Finish - Locking Pacer Hooded Stem Caster - 50mm Diameter - 5/16" x 1" Threaded Stem - 75 lbs Capacity - Nylon Wheels shepherd
Ships in 1-3 Business Days
Shepherd PPA50507BC-B 50mm Nylon Dual Wheel Caster with Brake – 75 lb
Part # PPA50507BC-B
$32.00
Volume pricing available
NylonThreaded Stem
Load rating
75 lbs
Size2" x 1-11/16"
Capacity75 lbs
WheelNylon
MountThreaded Stem
TypeSide Lock Brake
More Details Less Details
Width 1-11/16"
Height 2-1/2"
Temp Range -40°F to 250°F
Brake Side Lock Brake
Frame Zinc Plated Steel
PPA50507BC-B - Bright Chrome Finish - Pacer Hooded Stem Caster - 50mm Diameter -...
Shop Product

Choosing a finish and brake

Option Part numbers
No brake PPA50507WA, PPA50507FB, PPA50507BC, PPA50507SC
Side lock brake PPA50507WA-B, PPA50507FB-B, PPA50507BC-B, PPA50507SC-B

From product titles [S1]. Rated 75 lb each.

Fitting a threaded stem

  • Measure the thread: 5/16 in diameter and 1 in long, and match the insert or tapped hole in your furniture.
  • Thread it in by hand and snug it; do not over tighten into wood inserts.
  • Four casters at 75 lb each carry about 300 lb in total on a level floor.

Twin nylon wheels

Two narrow wheels turn more easily than one wide wheel and spread the load. Hard nylon rolls well on carpet but can mark or scratch soft floors.

The whole series: Pacer twin wheel casters.

5/16 x 1 in stem caster questions

What stem do these casters use?

A 5/16 x 1 in threaded stem.

How much does each caster hold?

75 lb.

Is there a version with a brake?

Yes. Every finish is also listed with a side lock brake (part numbers ending in -B).

Jordan Wilson, CasterHQ · reviewed October 20, 2026 · 844-439-4335 · info@casterhq.com

Sources

  • [S1] CasterHQ product fields (rated load, diameter, width, wheel and core material, temperature range, mount) and product descriptions for the items on this page, pulled October 20, 2026.

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