ShopAmerex.com · Amerex 16664-P001 datasheet · https://shopamerex.com/products/amerex-16664-p001-wheeled-unit-halotron-collar-o-ring · Figures as published by Amerex · Verified Sep 2, 2026
Genuine Amerex service part·Part no. 16664-P001
Amerex 16664-P001 Wheeled Unit Halotron Collar O-Ring
Amerex 16664-P001 is the collar o-ring for Amerex's 65 lb. Full overview ↓
- Part no.
- 16664-P001
- Pack
- Pack of 1
- Parts Book
- Page 26
- UPS-calculated at checkout. Free shipping on orders over $100.
- Returns per our refund policy.
Genuine Amerex part from an authorized Amerex distributor. Not a generic substitute.
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What is the Amerex 16664-P001?
Amerex 16664-P001 is the collar o-ring for Amerex's 65 lb. and 150 lb. Halotron I stored-pressure wheeled extinguishers, printed in the Parts Book as 16664-P — item 16 on page 24 (B673) and item 18 on page 25 (B674, B675). It seals the valve assembly against the cylinder neck and, per Amerex's service manual, is discarded and replaced with a new GREEN o-ring, lightly lubricated with V-711, alongside the valve stem assembly at every six-year complete maintenance. Per the Parts Book notice, genuine Amerex replacement parts protect the UL listing and keep the extinguisher warranty in effect.
Amerex 16664-P001 specifications
| Part number | 16664-P |
|---|---|
| Description | Collar O-Ring |
| Parts Book page | 24 (PDF page 26); 25 (PDF page 27) |
| Diagram item | 16 (p.24); 18 (p.25) |
| Models | B673, B674, B675 |
|---|
| Amerex item number | 16664-P001 |
|---|
Part data as published by Amerex. Confirm against the current Parts Book revision before ordering for a unit in service.
Amerex 16664-P001 documents
Official Amerex publications · PDFCurrent Amerex publications, hosted on ShopAmerex so links do not break when Amerex reorganizes its site.
Other parts on Parts Book page 26
Parts list for 65 lb. Halotron I wheeled model · All 7 parts| Part no. | Part | Pack | Price | Quantity and add to cart |
|---|---|---|---|---|
| 16724 | Each | $731.00 | ||
| 22979 | Each | $403.00 | ||
| 22983 | Each | $4.99 | ||
| 23811 | Each | $107.00 | ||
| 24760 | Each | $1,460.00 | ||
| 25025 | Each | $31.99 |
Item numbers refer to the exploded view on the Parts Book page. Model-specific items are marked in the Amerex parts list; confirm before ordering.
Amerex 16664-P001 questions
What does the Amerex 16664-P001 collar o-ring fit?
The Amerex B673 65 lb. Halotron I wheeled extinguisher (item 16, page 24) and the B674/B675 150 lb. Halotron I wheeled units (item 18, page 25); the Parts Book part number is 16664-P.
Is Amerex 16664-P001 a genuine Amerex part?
Yes; the Parts Book notice states genuine Amerex replacement parts are required to protect the UL listing and keep the warranty in effect.
What does the collar o-ring do?
It seals the valve assembly against the cylinder neck, where the valve seats into the cylinder.
When is the collar o-ring replaced?
At the six-year complete maintenance, when Amerex's service manual calls for discarding the old o-ring and carefully installing a new GREEN o-ring lightly lubricated with V-711, alongside a new valve stem assembly.
Can Amerex 16664-P001 be used on the SF 1230 (Model 775) wheeled unit?
No; the Model 775 Parts Book page lists a different collar o-ring, part 05239-P.
Is the collar o-ring included in a complete replacement valve assembly?
No; the Parts Book's replacement valve assembly note lists the valve body, gauge, gauge guard, cam, lever, valve stem assembly, spring and downtube/retainer assembly — the collar o-ring is ordered separately.