The B3000-50 is the 50 mL hybex bottle with standard GL32 blue cap, sold as 10-bottle pack at $133 ($13.31 per bottle). Important: this SKU uses the GL32 thread standard (a smaller cap thread than the GL45 used across the rest of the B3000 family), designed for the smaller bottle neck typical of 50 mL bottle formats.
Critical thread-compatibility warning: The B3000-50 (GL32 cap) is NOT cap-interchangeable with the rest of the B3000 family (which uses GL45). The GL32 replacement cap is B3000-CAP2 ($41 / 10pk); the GL45 replacement cap B3000-CAP DOES NOT FIT the 50 mL bottle. Confirm cap-accessory thread compatibility at every replacement-cap procurement.
Key Specifications
| SKU | B3000-50 |
| Type | hybex small-volume bottle with GL32 blue cap |
| Volume | 50 mL |
| Cap thread | GL32 (smaller thread standard, NOT GL45) |
| Pack quantity | 10 bottles per pack |
| Per-bottle cost | $13.31 |
| Compatible replacement cap | B3000-CAP2 (GL32 standard blue cap, 10/pk, $41) |
| Incompatible cap | B3000-CAP DOES NOT FIT (B3000-CAP is GL45, this bottle is GL32) |
| Sister larger-volume SKUs | B3000-100-B, B3000-250-B, etc., all GL45 (different cap thread, not interchangeable) |
| List price | $133 |
Why GL32 at the 50 mL Bottle Scale
The GL32 cap thread is the standard smaller-bottle thread for 50–100 mL bottle formats in the lab industry. Bottle necks at this volume scale are sized to GL32 to accommodate the smaller bottle geometry; GL45 caps would not fit the smaller neck. The hybex family follows this industry convention:
- 50 mL bottles: GL32 cap (this SKU)
- 100 mL and larger bottles: GL45 cap (the rest of the B3000 family)
For dual-cap-thread inventory facilities, both standards are common across the lab, facilities typically maintain replacement caps for both thread standards.
When to Pick the 50 mL Bottle
Pick the 50 mL bottle (B3000-50) when:
- Workflow uses small-aliquot 50 mL storage as the format (small reagent aliquots, sample-prep stocks, single-use reagent volumes)
- GL32-thread-accessory-compatible workflows: facility uses GL32-compatible accessories (smaller dispensing caps, smaller filtration accessories)
- Multi-thread-standard facility. Facility maintains both GL32 and GL45 inventory for diverse storage volumes
Step up to GL45 100 mL pack (B3000-100-B) when GL45 cap-thread compatibility is the procurement standard and 100 mL is an acceptable working volume.
Ordering & Configuration
Confirm cap-thread accessory inventory. Critical: GL32 caps and GL45 caps are NOT cross-compatible. Confirm B3000-CAP2 (GL32 replacement cap) inventory at order. The standard B3000-CAP (GL45) does NOT fit this bottle.
Confirm autoclave compatibility. 50 mL bottles can typically autoclave with vented caps; confirm autoclave SOP at order.
Confirm at quote: bottle / cap material, GL32 cap-accessory pairing, autoclave compatibility, and lead time.
Warranty: Per Benchmark Scientific standard consumable terms.
hybex small-volume bottle (GL32 thread):
- B3000-50 (this product): 50 mL × 10/pk ($133, $13.31/bottle), GL32 thread
The 50 mL bottle uses GL32 (smaller thread); all other B3000 bottles use GL45. Pair with B3000-CAP2 GL32 replacement cap, NOT B3000-CAP (GL45). See B3000-1000-B anchor for the GL45 family chemistry; this 50 mL bottle is the family's smaller-thread outlier.
